Technical field
[0001]
The present invention is primarily container with lid for cooking which is heated by a microwave oven or the like, and to a container for use therein.
BACKGROUND
[0002]
Conventionally, a plastic container for containing the contents, and a flange portion formed in the container, a flange portion circumferentially of the sheet - container with lid comprising a lid that is joined by the pole tip is known. Contents contained in the container with a lid is heated by a microwave oven. Contents, and the like cooked or semi-cooked food.
[0003]
The contents contained in a container in a state of being sealed by a lid, and heated using a microwave oven, water contained in the contents with the heating is gradually increased pressure of the housing portion of the container and evaporated. When the pressure of the housing portion of the container is increased, there is a possibility that the lid and container soiling rupture to the contents are scattered in a microwave oven. Such problems in mind, the pressure in the housing portion of the container with lid is equal to or higher than a predetermined value, it is proposed to provide a venting mechanism to release the housing portion and the outside vapor in the storage portion is communicated with the outside there.
[0004]
　For example, Patent Document 1 below, becomes so Megura seal portion to the entire circumference of the outer peripheral portion and the bulging portion of the flange portion, the seal portion is peeled off by the bulge portion, for cooking removing the expanded air in the container container with a lid is disclosed. In this vessel, not bulging portion flange portion only, is also formed on the container side.
CITATION
Patent Document
[0005]
Patent Document 1: Real-Open 03-87688 JP
Disclosure of the Invention
[0006]
　When the internal pressure of the container with lid is raised, the lid is expanded to an arc from the plane. As a result, a pair of flanges for opposing likely to be warped into pulled and upward. The degree of warp of the flange portion, the heating conditions and the microwave oven depends on the thickness and material of the flange.
[0007]
　When vapors to escape after, the warp of the upper flange portion is generated, inevitably, the lid and the flange portion of the sealing portion is likely to contact. Therefore, also a part of the sealing portion as provided above venting mechanisms, a problem that the lid and the flange portion will not easily released vapor in close contact occurs.
[0008]
　In this regard, in Patent Document 1 described above, not only the bulging portion is a flange portion only, because they also formed on the container side, the stiffness on the side is given by the presence of the bulge portion, the first place a problem that warping of the flange portion is generated is less likely to occur. However, from the viewpoint of accommodating the contents, ensuring carrying capacity, appearance, content removal property, in view of extra protrusions like bulging portion is formed on the surface of the container side and yet not a continuous flat or curved, it is preferable. However, in this case, the problem of the flange portion as described above vapor hardly escape warp occurs.
[0009]
　The present invention, this problem can effectively resolve, and an object thereof is to provide a container with lid.
[0010]
　Side present invention includes a container having an opening formed, a container with a lid and a lid joined to the container covers the opening, the container is erected and the bottom, from the bottom portion and parts, are provided continuously on the top of the side portion, and a flange portion including a first plane, circumferential sealing portion is formed between the first plane of said lid and said flange portion, the seal portion includes a primary seal portion, and a projecting seal portion protruding inward with respect to said principal sealing portion, to at least one of the flange portion or the lid, corresponding to at least the protruding sealing portion at a position, outside of the protruding sealing portion, the flange portion to suppress adhesion suppression mechanism adhesion of the lid are formed, a container with a lid.
[0011]
　In the side of the container with lid according to the present invention, a first portion corresponding to the protruding sealing portion is constituted the same plane or the same curved surface continuous with the second portion located on either side of the first portion it may be.
[0012]
　In the container with lid according to the present invention, the adhesion suppressing mechanism may include a notch formed in the flange portion at the outside of the projecting seal portion.
[0013]
　In the container with lid according to the present invention, the outer edge of the projecting seal portion may be in contact with the notch portion of the flange portion.
[0014]
　In the container with lid according to the present invention, the adhesion suppressing mechanism includes a stepped portion formed in the flange portion at the outside of the projecting seal portion, the step portion, the first plane is connected to the first plane flange wall portions extending downward from may at least contain.
[0015]
　In the container with lid according to the present invention, the outer edge of the projecting seal portion may be in contact with the step portion of the flange portion.
[0016]
　In the container with lid according to the present invention, the adhesion inhibiting mechanism, the outside of the projecting seal portion is formed in said first plane of said flange portion, from the first plane comprise a protrusion protruding upward good.
[0017]
　In the container with lid according to the present invention, the adhesion suppressing mechanism includes at least two of the convex portions are arranged with a gap, at least two of the projections, the center point and the said opening in a plan view so that it is possible to draw a straight line extending to the outer edge of the flange portion without intersecting said convex portion together through the gap, it may be disposed.
[0018]
　In the container with lid according to the present invention, the adhesion suppressing mechanism may include a notch formed in the lid at the outside of the projecting seal portion.
[0019]
　In the container with lid according to the present invention, the first line segment a portion connecting two intersections of the outer edge of the seal portion of the straight line extending so as to pass through the center point of the center point and the aperture of the protruding sealing portion and referred, when referring to the portion connecting two intersections of the outer edge of the seal portion of the straight line extending through the center point of the opening as well as perpendicular to the first line and the second line segment, preferably the first line segment is shorter than the second segment.
[0020]
　In the container with lid according to the present invention, the projecting seal portion may be formed at two or more locations in a position facing the container.
[0021]
　In the container with lid according to the present invention, preferably, the first minimum distance in the plan view from the adhesion inhibiting mechanism to said opening, wherein the main seal portion and the protruding sealing portion is connected among the seal portion shorter than the second shortest distance in a plan view to the opening from the inner edge of the connecting portion.
[0022]
　The present invention provides a container having an opening formed includes a bottom portion, and erected sides from the bottom portion, are provided continuously on the top of the side portion, the first plane lid is joined, and a flange portion defining the opening, the flange portion, the provided flange portions to suppress adhesion suppression mechanism adhesion of the lid is formed, the adhesion inhibiting mechanism, the outer edge of the flange portion notches formed, projecting from said first plane is connected to the first plane stepped portion and a second plane which is continuously provided on the flange portion and the flange wall portions extending downwardly, or upwardly from the first plane including a convex portion for a container.
[0023]
　In the side of the container according to the present invention, a first portion corresponding to the adhesion inhibition mechanism may constitute the same plane or the same curved surface continuous with the second portion located on either side of the first portion .
[0024]
　A container according to the present invention, preferably, the adhesion-reduction mechanism is located on a straight line extending between the center point of the opening and the inner edge of the flange portion so as to connect with the shortest distance.
[0025]
　Container with lid of the present invention, when the microwave heating, even when the flange portion of the container is warped, it is possible to pass vapors from the projecting seal portion.
BRIEF DESCRIPTION OF THE DRAWINGS
[0026]
FIG. 1 is a plan view of a container with lid of the first embodiment of the present invention.
FIG. 2 is a perspective view of a container with lid of the first embodiment of the present invention.
3 is a plan view of a container constituting the container with lid of FIG.
Is a cross-sectional view taken along FIG. 4A] IVA-IVA line capped container shown in FIG.
It is a cross-sectional view taken along a capped container in line IVB-IVB shown in FIG. 4B] FIG.
FIG. 5 is a plan view of a container with lid of the first modification of the first embodiment.
6 is a perspective view of a container with lid of the first modification of the first embodiment.
It is a cross-sectional view taken along the capped container to VIIA-VIIA line shown in FIG 7A] FIG.
Is a cross-sectional view taken along a capped container line VIIB-VIIB shown in FIG. 7B] FIG.
8 is a plan view of a container with lid of the second modification of the first embodiment.
9 is a plan view of a container constituting the container with lid of FIG.
FIG. 10 is a plan view of a container with a lid of the third modification of the first embodiment.
11 is an exploded view of members constituting a container with lid according to the second embodiment of the present invention.
Is a plan view showing a container with lid according to the second embodiment of FIG. 12 the present invention.
Is [13] a cross-sectional view of a container with lid cut along line XIII-XIII shown in FIG. 12.
14 is a sectional view showing a modification of the container with a lid.
Is a sectional view showing an example of FIG. 15 the layer of the lid structure.
It is an enlarged plan view showing the Figure 16] projecting seal portion shown in FIG. 12.
17 is a cross-sectional view of the container with lid taken along line XVII-XVII shown in FIG. 12.
FIG. 18 is an enlarged plan view showing the notched portion of the flange portion.
19 is a plan view illustrating the process for producing the container notch in a part of the outer edge is formed in the flange portion.
It is a plan view showing a step of heat-sealing the lid to the flange portion of the FIG. 20 container.
It is a plan view showing a modified example of the notch portion of FIG. 21 flange portion.
22 is a plan view showing a modification of the container with a lid.
FIG. 23 is a plan view showing a modification of the container with a lid.
It is a sectional view showing a modification of the adhesion inhibiting mechanism formed in the flange portion of the FIG. 24 container.
[FIG 25 is a plan view showing a modification of the protruding sealing portion.
FIG. 26 is a plan view showing a modification of the protruding sealing portion.
FIG. 27 is an exploded view of members constituting a container with lid according to the third embodiment of the present invention.
Is a plan view showing a container with lid according to the third embodiment of FIG. 28A] present invention.
It is a sectional view showing a when viewed along the vessel with lid in XXVIIIB-XXVIIIB line shown in FIG. 28B] FIG 28A.
It is an enlarged plan view showing a projecting seal portion shown in FIG. 29 FIG. 28A.
It is a sectional view showing a when viewed along the vessel with lid line XXX-XXX shown in FIG. 30 FIG. 29.
It is a sectional view showing a modification of FIG. 31 flange portion.
Is [32] a cross-sectional view showing a when viewed along the vessel with lid in a straight line Lc shown in FIG. 29.
Is [Figure 33A] cover is a diagram showing an inflated state.
[Figure 33B] lid is peeled from the flange portion steam is a diagram showing a state exit to the outside.
FIG. 34 is a plan view showing a container with lid according to the first modification of the third embodiment.
Is a drawing showing a process for forming the body portion and the convex portion in FIG. 35A] sheet.
In FIG. 35B] sheet is a diagram showing a step of bonding the lid.
Is a diagram illustrating a FIG. 35C] forming a corner portion by punching a sheet.
Is a diagram illustrating the FIG. 35D] step of cutting along the conveying direction of the sheet.
It is a diagram illustrating a FIG. 35E] step of cutting along a direction orthogonal to the sheet in the conveying direction.
[FIG. 36] is a plan view showing a container with lid according to the second modification of the third embodiment.
It is a sectional view showing a when viewed along the vessel with lid in a straight line Lc shown in FIG. 37 FIG. 36.
Is [Figure 38A] cover is a diagram showing an inflated state.
[Figure 38B] heat-softenable resin layer is a diagram showing a state of softening.
[Figure 38C] lid is peeled from the flange portion steam is a diagram showing a state exit to the outside.
[39] is an exploded view of members constituting a container with lid according to the fourth embodiment of the present invention.
Is a plan view showing a container with lid according to the fourth embodiment of FIG. 40A] present invention.
It is a sectional view showing a when viewed along the vessel with lid in XXXXB-XXXXB line shown in FIG. 40B] FIG 40A.
It is an enlarged plan view showing a projecting seal portion of the joint portion shown in FIG. 41 FIG. 40A.
[FIG. 42] is a sectional view showing a when viewed along the vessel with lid in a straight line Lc shown in FIG. 41.
Is [Figure 43A] cover is a diagram showing an inflated state.
[Figure 43B] lid is peeled from the flange portion steam is a diagram showing a state exit to the outside.
[Figure 43C] flange portion is a diagram showing a state of deforming.
[FIG. 44] is a plan view showing a container with lid according to the first modification of the fourth embodiment.
[FIG. 45] is a plan view showing a container with lid according to the second modification of the fourth embodiment.
[FIG. 46] is a plan view showing a container with lid according to the third modification of the fourth embodiment.
[FIG. 47] is a plan view showing a container with lid according to the fourth modification of the fourth embodiment.
Is [48] a cross-sectional view showing a when viewed along the vessel with lid in a straight line Lc shown in FIG. 47.
Is [Figure 49A] cover is a diagram showing an inflated state.
[Figure 49B] heat-softenable resin layer is a diagram showing a state of softening.
[Figure 49C] lid is peeled from the flange portion steam is a diagram showing a state exit to the outside.
[FIG. 50] is an exploded view of members constituting a container with lid in the fifth modification of the fourth embodiment.
[FIG. 51] is a plan view showing a container with lid in the fifth modification of the fourth embodiment.
Is [52] a cross-sectional view showing a when viewed along the vessel with lid in a straight line Lc shown in FIG. 51.
DESCRIPTION OF THE INVENTION
[0027]
　Hereinafter, each embodiment of the present invention will be described in detail, the present invention is not intended to be limited to the following embodiments, within the scope of the object of the present invention, be practiced with appropriate modifications can.
[0028]
　 First Embodiment
　
　Hereinafter, the container with lid 10 of the first embodiment will be described with reference to FIGS. 1 to 4B. Figure 1 is a plan view of the container with lid of the first embodiment, FIG. 2 is a perspective view of a container with lid of the first embodiment. Figure 3 is a plan view of a container 20 forming a container with lid 10. 4A is a sectional view taken along a container with lid 10 on line IVA-IVA of FIG. 1, FIG. 4B, taken along a container with lid 10 shown in Figure 1 the line IVB-IVB cross section it is a diagram. In order to avoid to become complicated, it is shown by a solid line also configured on the lower side of the lid 30 in FIG. 1. In the accompanying drawings to the present specification, for convenience of easy understanding and illustration, the scale and aspect of the dimensional ratios and the like, may be exaggerated appropriately changed from those of the real. Also, as used herein, identifies the shape and geometric conditions and the degree thereof, such as "parallel", the "orthogonal", terms and the length of such "identity" and angle values or the like, exact meaning without being bound, and interpreting including range that can expect a similar function.
[0029]
　(Capped container)
　container with lid 10 includes a container 20, a lid 30 covering the opening 29 of the container 20, between the container 20 and the lid 30, the circumferential sealing portion 40 is formed there. In Figure 1, reference numeral 40x is end located opening 29 side of the sealing portion 40 (hereinafter, the inner edge also referred to) represents the sign 40y represents the outer edge on the opposite side of the inner edge 40x. By joining the container 20 and the lid 30 via the seal portion 40, the contents of such food (not shown) is sealed. In the present invention, the term "circumferential" refers to a seal portion which is formed over the circumference, not limited to a circular shape may be a polygonal shape, a circular shape and a polygonal shape or it may be combined.
[0030]
　Contents contained in the container with lid 10 is not particularly limited, examples of the contents can be, for example, retort foods, etc. frozen foods and refrigerated foods. Also, as the food, mention may be made of curry, porridge, fried noodles, prepared foods, such as fish. In these contents, since water evaporates increasing the pressure in the housing portion of the container with lid 10 with the heating, venting function vapors to escape the container with lid 10 to the outside with a lid for cooking required for the container 10.
[0031]
　[Vessel]
　container 20, for example, can be molded by injection molding or sheet molding. It is not particularly limited as the material constituting the container 20 can be a plastic such as polypropylene, polystyrene or polyethylene terephthalate. When manufacturing the container 20 by injection molding, in order to ensure the moldability, high H1 (Fig. 4A, 4B refer) of the container 20, the short length of the flange portion 22 of the container 20 L2 (see FIG. 1 ) it is preferable to be less than or equal to.
[0032]
　In the present invention, as the contents to be housed in the container with lid 10, refrigerated (chilled) or frozen food are also contemplated. In this case, for example, it is a container using a conventional homopolypropylene, impact resistance at low temperature is lowered. Accordingly, by using the like block polypropylene containing a rubber component and ethylene component, it improves the impact resistance at low temperatures. However, the addition of the rubber component and ethylene component, as it reduces the rigidity of the container including the flange portion, a problem that warping of the flange portion is likely to occur. In other words, the container with lid of the present invention is suitably used in the case of using a block polypropylene containing a rubber component and an ethylene component as a container. Alternatively, even a container with a homopolyethylene, is suitably used in the case where the thickness is thin.
[0033]
　Next, with reference to FIGS. 1 to 4B, a description will be given of the configuration of the container 20. Container 20 has a body portion 21 including a bottom (bottom wall) 211 and side (side wall) 213, which is provided continuously on the upper edge of the side 213 of the body portion 21, a flat flange portion 22, a ing. Inner edge 22x of the flange portion 22 defines an opening 29 of the housing portion of the container 20. Side 213 is erected from the bottom 211 so as to spread over the circumference along the outer edge of the bottom portion 211.
[0034]
　The lid 30 is on the upper surface of the flange portion 22 of the container 20, are joined via a sealing section 40. In Figures 1 and 2, the flange portion 22 is provided continuously on the upper edge of the side 213, it has been shown example extending horizontally outwardly. In this specification, terms such as "plan", "upper", "lower", "upper", "horizontal", "horizontal direction", the container as the bottom 211 of the container 20 is positioned below relative to the state 20 is placed, the container 20 is representative of the position and direction of the lid 30 and their components.
[0035]
　The bottom 211, as in the ridge 212 shown in FIGS. 4A and 4B, may be one or more protrusions and recesses are formed. Thus, when cooking the contents by using the microwave oven, it is possible to prevent the Futazuke container 10 is deformed when the increased pressure inside the container with lid 10.
[0036]
　In the present embodiment, at the side 213, a first portion 214 corresponding to the cutout portion 23 described later constitute the same plane or the same curved surface continuous with the second portion 215 positioned on both sides of the first portion 214 . In the present embodiment, as shown in FIG. 1, the other end portion sandwiched between the straight line lb corresponding to the straight line la and the notch 23 corresponding to one end of the notch 23 in the first portion 214 of the side 213 There, both sides and the second portion 215 is positioned in the side 213 of first portion 214, a first portion 214 of the side 213 second portion 215 forms a single plane continuous. In other words, the inner edge 22x of the flange portion 22 corresponding to the first portion 214 and second portion 215 of the side 213 forms a straight line (see Figure 1). In the case where the second portion 215 of the first portion 214 and the side 213 of the side 213 form the same curved surface, to form a single curved surface first portion 214 and second portion 215 are continuous.
[0037]
　[Flange]
　contour of the flange portion 22 is formed at the outer edge 22y, has a pair of long sides 22a, a rectangular contour and a pair of short sides 22b. As shown in FIG. 1, in this embodiment, even those corners 22c are provided between the long side 22a and a short side 22b, included in the rectangular shape concept. That is, in this embodiment, the contour of the flange portion 22, through the long side 22a, a corner 22c, the short side 22b, a corner 22c, the long sides 22a, corner 22c, the short side 22b, the corner portion 22c, the circumferential continuously formed on Jo. In the following description, the portion extending along the inner long side 22a of the flange portion 22, also referred to as a long side portion 22A. Further, a portion extending along the short side 22b of the flange portion 22, also referred to as short side portions 22B. Further, a portion corresponding to the corner portion 22c of the flange portion 22, also referred to as corner portions 22C.
[0038]
　In Figure 1, reference numeral L1 is the longitudinal length of the flange portion 22 represents a (distance between one short side 22b and the other short side 22b), reference numeral L2 is the lateral direction of the flange portion length and represents a (distance between one long side 22a and the other long side 22a), the length L1 is larger than the length L2. 1 and 2, the corner portion 22c is located between the long sides 22a and short 22b, are formed in an arc shape convex to the outside. Corners 22c, for example, obtained by chamfering the corners of the flange portion having a rectangular profile.
[0039]
　In Figure 1, reference numeral M1, among the straight line IVA extending so as to pass through the center point 29c of the tip distal end point of portion P2 and the opening 29 of the protruding sealing portion 44 to be described later, the outer edge 40y of the circumferential sealing portion 40 It represents a moiety that connects the two points of intersection (hereinafter, referred to as a first line segment). In the example shown in FIG. 1, one end of the first line segment M1 is located at the outer edge 40y of the protruding sealing portion 44 on one long side portion 22A, the other end of the first line segments M1, the other long side portion located on the outer edge 40y of the main seal portion 42 on 22A. Further, in FIG. 1, reference numeral M2, among the straight line extending through the center point 29c of the opening 29 as well as perpendicular to the first line segments M1, the two intersections of the outer edge 40y of the circumferential sealing portion 40 connecting portion represents a (hereinafter, the second referred to as segment). In the example shown in FIG. 1, one end of the second line segment M2 is located on one of the outer edge 40y of the main seal portion 42 on the shorter side portion 22B, the other end of the second line segment M2, the other shorter side portion located on the outer edge 40y of the main seal portion 42 on 22B. The first line segment M1 is shorter than the second segment M2. For example, the length of the first line segment M1 is 0.85 or less of the length of the second line segment M2, more preferably 0.75 or less, further preferably 0.70 or less.
[0040]
　Be greater than the length L1 of the length L2, or, by the first line segment M1 shorter than the second line segment M2, bulge how the lid 30 when the contents are heated using a microwave oven even if the variation is present, it is possible to separate the projecting seal portion 44 described later on the longer-side portion 22A, before the other portions of the sealing portion 40 from the cover 30 or the flange portion 22.
[0041]
　In the present invention, the contour shape of the flange portion 22 is not particularly limited, and may be the entire circular, elliptical, polygonal, or a combination thereof. Further, corner portions 22c is not limited to the curved portion, it may be configured at the corners. The thickness of the flange portion 22 is set within the range of, for example, 0.5mm or 2.0mm or less.
[0042]
　Flange 22 is a flange portion that extends horizontally from the upper edge of the side 213, in the present embodiment, as shown in FIGS. 4A and 4B, is composed of a first plane 221. The first plane 221, the upper edge of the side 213, that is, the flange-shaped portion extending horizontally from the inner edge 22x of the flange portion is a plane that constitutes the sealing portion 40.
[0043]
　[Notch]
　At the center of the long side of one of the longer-side portion 22A of the flange portion 22, cutout portions 23 formed to protrude inwardly of the container 20 is formed. The notch 23, in the region where the lid 30 is present, a portion having no flat portion extending in a horizontal direction, FIG. 1, FIG. 3 and FIG. 4A, shown as a portion where the first plane 221 is not present there. Notch 23, with cutting out the outer edge of one long side portion 22A, the opening 29 side of the center point are formed so as to be tapered toward the (vertex) P1, in Figure 1 notch 23 the shown examples of the triangular shape. As described below, notch 23 serves to prevent the the lower surface of the upper surface and the lid 30 of the flange portion 22 comes into close contact when the contents are heated. In the following description, such as notch 23, that the suppressing component adhesion of the flange portion 22 and the lid 30, also referred to as an adhesion suppressing mechanism 19.
[0044]
　3, reference numeral L3 is attached straight line, a straight line extending between the center point 29c of the inner edge 22x and the opening 29 of the flange portion 22 so as to connect with the shortest distance. Preferably, the adhesion suppressing mechanism 19, as shown in FIG. 3, located on the straight line L3.
　Further, in FIG. 3, reference numeral M5 represents a portion overlapping the opening 29 of the straight line L3 (hereinafter, referred to as a fifth line segment). Further, in FIG. 3, reference numeral M6, the portion overlapping the opening 29 of the straight line extending through the center point 29c of the opening 29 as well as perpendicular to the fifth segment M5 (hereinafter, referred to as a sixth segment) a representative. The fifth line segment M5 shorter than the sixth line M6. For example, the length of the fifth segment M5 is 0.85 or less of the length of the sixth line M6, more preferably 0.75 or less, further preferably 0.70 or less.
[0045]
　[Seal portion]
　As shown in FIG. 1, between the flange portion 22 of the lid 30 and the container 20, circumferential seal portion 40 for bonding the lid 30 and the flange portion 22 is continuously formed over one circumference It is. Circumferential seal portion 40, heat, ultrasound, or may be formed by at least partially melting at least one of the container 20 or lid 30 by a sealing means such as high frequency. The seal portion 40, such as an adhesive, or may be formed by a separate component from the container 20 and lid 30. The seal portion 40 by forming between the lid 30 and the flange portion 22 can seal the opening 29 of the container 20 without clearance.
[0046]
　As shown in FIG. 1, circumferential sealing portion 40, the outer edge at a long side 22a of the flange portion 22, the short side 22b, a main seal portion 42 which extends along the corner portion 22c, the length of the flange portion 22 is disposed at a substantially central portion on the side portions 22A, it is composed of a main seal portion 42 and the projecting seal portion 44 protruding inward.
[0047]
　Projecting seal portion 44 is formed on the first plane 221 positioned inside the cutout portion 23, along the notch 23, the tip point projects inwardly of the container 20 in a substantially V-shape with a (top) P2 It is provided. As described later, the protruding sealing portion 44 is peeled off before the main seal portion 42 when the contents are heated, operable to discharge the steam inside the container with lid 10 to the outside. In the following description, such as the protruding sealing portion 44, the components for discharging the vapor inside the container with lid 10 preferentially to the outside, also referred to as a venting mechanism 18.
[0048]
　In the present invention, the flange portion constituting the circumferential sealing portion 40 is not limited to a plane, to form a convex portion to the flange portion, to form a circumferential sealing portion 40 through the convex portion it may be.
[0049]
　[Lid]
　material forming the lid 30 joined to the container 20, so that the bottom surface of the cover 30 may be joined to the upper surface of the flange portion 22 of at least the container 20, is selected. For example, the lid 30 includes a substrate layer, and the sealant layer constituting the lower surface of the lid 30. The thickness of the lid 30 is not particularly limited and may be, for example, 20μm or 100μm within the following range.
[0050]
　The material for the substrate layer, a polyester resin such as polyethylene terephthalate, and polyamide resins such as nylon, can be used such as polypropylene. As the material constituting the sealant layer, it is possible to use a polypropylene or a mixed resin of polypropylene and polyethylene. Incidentally, when the substrate layer and the sealant layer comprises a polypropylene any, biaxially oriented polypropylene is used in the base layer, cast polypropylene is used in the sealant layer.
　
[0051]
　Interior container with lid 10 contents Monoiri, when the contents are heated using a microwave oven, the temperature of the contents is increased, along with this, moisture contained in the contents of the container with lid 10 and evaporated increasing pressure of. When the pressure inside the container with lid 10 is further increased with the heating, occurs bulge on the lid 30, the stress is applied to the circumferential seal portion 40. Here, in the container 10 with a lid, the tip point P2 of the protruding sealing portion 44 is formed on the long side portion 22A of the flange portion 22. Therefore, stress is concentrated on the tip point P2 of the protruding sealing portion 44.
[0052]
　At this time, the inner edge 22x of the position of the flange portion 22 corresponding to the protruding sealing portion 44 has no straight, second portion 215 located first portion 214 of the side 213 and on both sides of the first portion 214 is coplanar or constitute the same curved surface, specifically, in this embodiment, the first portion 214 and the second portion 215 is constituted by the same plane.
[0053]
　As a result, the container with lid of notch 23 is not formed, the stress concentrated on the tip point P2 of the protruding sealing portion 44, when the flange portion of the protruding sealing portion 44 is warped upward, the downward lid 30 for one plane 127 is present, it easily released vapor in close contact with the lid 30 and the flange portion 22, even if the tip point P2 is peeled off preferentially, it is impossible to escape the vapors.
[0054]
　However, in the container with lid of the present embodiment, since the notch 23 under the lid 30 are formed, even warped flanges 22 including projections seal portion 44 can be easily passed through a steam .
[0055]
　[First Modification of the container with lid]
　A first modification of the first embodiment will be described with reference to the container with lid 10 in FIG. 5 ~ 7B. In the following description of other embodiments, the same drawing number and embodiment described above, and be read with the aid of the description in the above embodiment, the description thereof is omitted. The same applies to the second modification later. In order to avoid to become complicated, it is shown by a solid line also configured on the lower side of the lid 30 in FIG.
[0056]
　Container with lid 10 in FIG. 5 ~ 7B are that the step portion 24 is formed is different from the embodiment described above. In this variation, the step portion 24 functions as suppressing adhesion suppression mechanism 19 that the lower surface of the upper surface and the lid 30 of the flange portion 22 comes into close contact when the contents are heated.
[0057]
　In the first modification, the flange portion 22 includes a first plane 221, is continuously provided on the outer edge of the first plane 221 includes a flange wall portion 241 extending downwardly, at least. Flange portion 22 is provided continuously at the bottom of the flange wall portion 241 may further include a second plane 242 extending in the horizontal direction. In the example shown in FIG. 7A, the step portion 24 is formed by the flange wall portion 241 and the second plane 242. In this case, by providing a gap between the upper edge of the lower edge and the second plane 242 of the lid 30, the flange portion of the protruding sealing portion 44 even when the warps upward, to facilitate passed through a steam be able to. Here, in FIG. 7A, the spacing between the upper edge of the lower edge and the second plane 242 of the lid 30 is shown by reference numeral h1, h1 is preferably greater than or equal to 1 mm, to be 2mm or more 5mm or less It is more preferable. Incidentally, as long as the lower edge of the lid 30 and the second plane 242 is not in close contact, there is no possibility that the shape of the second flat 242 is limited to a flat shape.
[0058]
　[Second Modification of the container with lid]
　A second modification of the first embodiment will be described with reference to FIGS. Figure 8 is a plan view of a container with lid 10 according to this modified example, FIG. 9 is a plan view of a container 20 forming a container with lid 10 in FIG. 8. In order to avoid to become complicated, it is shown by a solid line also configured on the lower side of the lid 30 in FIG. 8. Container with lid 10 in FIG. 8 in that a notch 23 is two locations formed in a position opposed on a pair of long sides 22a differs from the first embodiment.
[0059]
　As shown in FIG. 8, the protruding sealing portion 44 are two locations formed on the first plane 221 positioned inside the notch 23. 8, reference numeral M3, among the straight line L4 extending so as to pass through the tip point P2 of the two projections seal portion 44, the portion connecting two intersections of the outer edge 40y of the circumferential sealing portion 40 (hereinafter, third representing the called line). In the example shown in FIG. 8, line L4 passes through the center point 29c of the opening 29. Further, in FIG. 8, reference numeral M4, among the straight line extending through the center point 29c of the opening 29 as well as perpendicular to the third line segment M3, the two intersections of the outer edge 40y of the circumferential sealing portion 40 connecting portion represents a (hereinafter, the fourth referred to as segment). The third line segment M3 shorter than the fourth segment M4. For example, the length of the third segment M3 is 0.85 or less of the length of the fourth segment M4, more preferably 0.75 or less, further preferably 0.70 or less.
[0060]
　9, reference numeral L5 is attached straight line, a straight line extending between the center point 29c of the inner edge 22x and the opening 29 of the flange portion 22 so as to connect with the shortest distance. Preferably, any two contact suppression mechanism 19, as shown in FIG. 9, located on the straight line L5. In the example shown in FIG. 9, the straight line L5 passes through the tip point P1 of the two notches 23.
　Further, in FIG. 9, reference numeral M7 represents a portion overlapping the opening 29 of the straight line L5 (hereinafter, referred to as a seventh line segment). Further, in FIG. 9, reference numeral M8, the portion overlapping the opening 29 of the straight line extending through the center point 29c of the opening 29 as well as perpendicular to the seventh line M7 (hereinafter, referred to as the eighth segment) a representative. The seventh line M7 shorter than the eighth line M8. For example, the length of the seventh line M7 is 0.85 or less of the length of the eighth line M8, more preferably 0.75 or less, further preferably 0.70 or less.
[0061]
　The second modification container with lid 10 of the first embodiment, the pressure of the seal head to form a circumferential sealing portion 40 even if the seal strength varies becomes uneven in the plane, the flange one of the two notches 23 formed in the part 22 can be passed through the steam from more reliably can be easily passed through a vapor.
[0062]
　[Third Modification of the container with lid]
　third modification of the first embodiment will be described with reference to the container with lid 10 in FIG. 10. In order to avoid to become complicated, it is shown by a solid line also configured on the lower side of the lid 30 in FIG. 10. Container with lid 10 in FIG. 10, that the stepped portion 24 is two places formed at opposite positions on the pair of long sides 22a is different from the first modification of the first embodiment.
[0063]
　The third modification container with lid 10 of the first embodiment, the pressure of the seal head to form a circumferential sealing portion 40 even if the seal strength varies becomes uneven in the plane, the flange one of the two stepped portions 24 formed in the part 22 can be passed through the steam from more reliably can be easily passed through a vapor.
[0064]
　Above, the container with lid of the present embodiment, even when the flange portion is warped by microwave heating, it becomes possible to appropriately permit vapors to escape from the venting mechanism of the seal portion.
[0065]
　 Second Embodiment
　The following describes the second embodiment of the present invention. First described problems the second embodiment is to solve.
[0066]
　In Patent Document 1 described above, the portion located inside of the projecting line of heat-sealing lines of the flange portion is projected portion that projects toward the accommodation portion is formed, also on the outside of the protruding line of the flange portion the portion located recess recessed toward the accommodating portion is formed. In other words, the protruding line of heat-sealing lines are formed between the convex portions of the inner edge side and the outer edge of the recess of the flange portion. In this case, in the step of heat sealing a lid to the flange portion with a hot plate, a portion having a pattern corresponding to the projecting line of the heating plate, it is necessary to arrange between the convex portion and the concave portion of the flange portion . Accordingly, required in the heat sealing process, the positioning accuracy of the hot plate is increased. As a result, time and cost required for heat-sealing process is increased. This embodiment aims to provide a container with lid that such problems can be effectively solved the.
[0067]
　Hereinafter, the container with lid 10 of the second embodiment will be described with reference to FIGS. 11 to 20. In the second embodiment, the first embodiment and the same parts may be omitted the detailed description are denoted by the same reference numerals. Also, when the effects obtained in the first embodiment it is apparent that also obtained in the second embodiment, it may be omitted from the description.
[0068]
　(Container with lid)
　with reference to first to FIG. 11 through FIG. 13, an outline of the container with lid 10. Figure 11 is an exploded view of members constituting a container with lid 10, FIG. 12 is a plan view of a container with lid 10. The 13 is a cross-sectional view showing a case where a container with lid of FIG. 12 taken along line XIII-XIII.
[0069]
　Container with lid 10 includes a container 20 accommodating portion 25 for accommodating the contents is formed, a lid 30 covering the opening 29 of the housing portion 25 of the container 20, the seal portion joining the lid 30 to the container 20 It includes a (joint) 40, a. Further, the container with lid 10 further includes a venting mechanism 18 for discharging the steam generated in the housing portion 25 by the contents are heated to the outside of the housing portion 25. In the present specification, the term "bonding" is a concept including both welding and adhesion. The term "welding", by at least partially melting at least one of the container 20 or lid 30, which means that mounting the lid 30 to the container 20. Also the "glue" is such an adhesive, by using a separate component from the container 20 and lid 30, which means that mounting the lid 30 to the container 20.
[0070]
　Contents contained in the container 20, containing at least water. Examples of the contents, for example, retort foods, such as frozen foods and refrigerated foods can be mentioned. Examples of food, mention may be made of curry, porridge, fried noodles, prepared foods, such as fish. In these contents, the pressure receiving portion 25 of the container 20 the water is evaporated is increased with the heating, it needs the vapor in the housing portion 25 to the venting mechanism 18 with lid container 10 to escape to the outside Become.
[0071]
　Hereinafter, the container 20, the lid 30 will be described seal portion 40 and the venting mechanism 18.
[0072]
　[Container]
　As shown in FIGS. 11 to 13, the container 20 includes a body portion 21 which defines the accommodating portion 25, a flange portion 22 which is connected over one circumference on the top of the barrel 21. Barrel 21 includes as in the first embodiment, for example, a bottom portion 211, the side 213 provided upright from the bottom portion 211 so as to spread over one circumference along an outer edge of the bottom portion 211, a. The bottom 211, as shown in FIG. 13, the raised portion 212 raised upwardly may be formed. Flange portion 22 is provided continuously on the upper edge of the side 213 of the body portion 21 and extends horizontally outwardly. In the present specification, "outside", it is the side away from the center point 29c of the opening 29 of the container 20 in a plan view. Further, "inside", it is the side closer to the center point 29c of the opening 29 of the container 20.
[0073]
　In this embodiment, the flange portion 22 has a contour of substantially rectangular shape (substantially rectangular shape). For example, the flange portion 22 includes a pair of long side portion 22A, and a pair of shorter side portion 22B, and a corner portion 22C located between the long side portion 22A and the shorter side portion 22B. The direction in which the long side portion 22A extends, and the direction of the shorter side portion 22B extends, are orthogonal to each other. 12, reference numeral L1 represents the distance between the outer periphery of the outer edge and the other shorter side portion 22B of one of the shorter side portion 22B, reference numeral L2 is of one long side portion 22A outer edge and the other it represents the distance between the outer edge of the long side portion 22A. The length L1 is greater than the length L2.
[0074]
　Corners 22C, as shown in FIG. 12, may have a curved shape that is convex toward the outside. Such corners 22C, for example, obtained by chamfering the corners of the flange portion having a rectangular profile. Although not shown, the corner portion 22C may have an angular shape. A part of the corner portion 22C of the plurality of corner portions 22C may be a tab 22D which protrudes outside the other corners 22C.
[0075]
　In FIG. 12, a pair of long side portions 22A are parallel to each other, a pair of short side portions 22B are parallel to each other, and examples in which the long side portion 22A and the shorter side portion 22B are orthogonal is shown to have, but not be limited to this. For example, a pair of long side portion 22A is may be non-parallel to each other, a pair of short side portions 22B may be non parallel to each other. Also, an angle made by the long side portion 22A and the short side portion 22B may be offset from 90 degrees.
[0076]
　As shown in FIGS. 11 and 12, a portion of the outer edge 22y of the flange portion 22, cutout portions 23 are formed recessed inwardly. Notch 23 is one of the elements constituting the venting mechanism 18 described above. Details of the notch 23 will be described later.
[0077]
　Figure 13 is a cross-sectional view taken a container with lid 10 in FIG. 12 at line XIII-XIII does not pass through the notch 23. In the example shown in FIG. 13, the flange portion 22 includes a first plane 221 extending flat from the inner edge 22x up to the outer edge 22y. However, it is not limited thereto, the flange portion 22 may include a like inclined surface or non-planar surface. For example, as shown in FIG. 14, the flange 22 may include an inclined surface 22e extending to the outer edge 22y inclined downward. In this case, it may not cover 30 is joined to the inclined surface 22e.
[0078]
　13, reference numeral T denotes the thickness of the container 20. The thickness T of the container 20 is, for example, 0.1mm or more and 1.0mm or less. As the thickness T of the container 20 is reduced, for example, when the thickness T of the container 20 is 100μm or more and 300μm or less, the side 213 and the flange portion 22 to the deformation is likely to occur in the container 20, when the thickness T is 200μm or less , deformation is more likely to occur.
[0079]
　The container 20 is deformation of the container 20 is likely to occur even if it contains a rubber component and ethylene component. Container 20, for example, when configured for block polypropylene containing a rubber component and an ethylene component, the stiffness and heat resistance is reduced as compared with homopolypropylene containing no rubber component and ethylene component.
[0080]
　The method of making the container 20, an injection molding method or sheet molding method may be employed. When manufacturing the container 20 by injection molding, in order to ensure the moldability, the height H1 of the container 20, is preferably not more than the distance L2 described above. The sheet molding method is a method for forming a desired shape to the sheet by pressing a mold in a plastic sheet. The material constituting the vessel 20, polystyrene, polypropylene, plastics such as polyethylene terephthalate.
[0081]
　Further, a plastic sheet, to prepare a container 20 by processing in molding deep drawing which is a kind of sheet molding method, it is possible to use a sheet having a 300μm thickness of not less than 100 [mu] m. Examples of the laminated body constituting the sheet, for example, a CPP / CNY / CPP and LLDPE / CNy / LLDPE. Here, "CPP" is the cast polypropylene, "CNy" is unstretched nylon, "LLDPE" is linear low density polyethylene.
[0082]
　[Lid]
　The lid 30 is disposed on the first plane 221 of the upper surface of the flange portion 22 so as to cover the opening 29 of the housing portion 25 of the container 20, it is joined by the seal portion 40 to the first plane 221 of the flange portion 22 there. The lower surface 32 of the lid 30 is configured to be joined to the first plane 221 of the flange portion 22. Figure 15 is a sectional view showing an example of the layer structure of the lid 30. As shown in FIG. 15, the lid 30 includes at least a sealant layer 35 constituting the lower surface 32 of the lid 30, the substrate 34 laminated on the sealant layer 35, a.
[0083]
　The material for the substrate 34, it is possible to use a polyester resin such as polyethylene terephthalate (PET), and polyamide resin such as nylon (Ny), a polyolefin resin such as polypropylene (PP). Substrate 34, may be configured from a uniaxially or biaxially film. The thickness of the substrate 34 is, for example, 5μm or more and 50μm or less.
[0084]
　The material constituting the sealant layer 35, low density polyethylene (LDPE), one or more resins selected from polyethylene, such as linear low density polyethylene (LLDPE) (PE), polypropylene (PP) it can be used. The sealant layer 35 may be a single layer or may be a multilayer. Further, the sealant layer 35 is preferably a non-oriented.
[0085]
　Sealant layer 35 preferably comprises a easy peel properties. Easily peelable and is operated to peel the lid 30 from the flange portion 22 of the container 20, the lid 30 is a lower surface 32, i.e. at the interface of the sealant layer 35, tends to peel off from the first plane 221 of the flange portion 22, that it is a characteristic. Easy peel properties, for example, a sealant layer 35 composed of two or more resins, by the incompatible and one of resin and another resin can be expressed. The resin can express the easy peel properties, for example, a mixed resin of polyethylene (PE) and polypropylene (PP).
[0086]
　Incidentally, the form for peeling the lid 30 from the flange portion 22 of the container 20, is not limited to peeling at the interface of the sealant layer 35 (delamination between the surface of the first plane 221 and the sealant layer 35 of the flange portion 22) . For example, the cohesive failure of the sealant layer 35 may be peeled off the lid 30 from the flange 22 and by delamination between the other layer adjacent to the one layer and its constituting the lid 30, the lid 30 There may be peeled from the flange portion 22.
[0087]
　The thickness of the sealant layer 35 is preferably 20μm or more and 100μm or less, more preferably 30μm or more and 80μm or less.
[0088]
　The lid 30 may further include other layers. Other layers, water vapor and other gas barrier property, light-shielding property, various kinds of mechanical strength, depending on the performance required, appropriate may be selected. For example, as a gas barrier layer, a metal layer and the aluminum foil, vapor-deposited layer of a metal oxide such as a metal or aluminum oxide, such as aluminum or an inorganic oxide such as silicon oxide, ethylene - vinyl alcohol copolymer (EVOH), poly vinylidene chloride resin (PVDC) or, and aliphatic polyamides such as nylon MXD6 may be provided. By providing such a gas barrier layer, the oxygen and water vapor can be prevented from entering the interior of the container with lid 10. Further, in order to impart mechanical strength to the lid member may be provided with support. The support may be the same as the material constituting the substrate 34. Gas barrier layer and the support, may be provided between the substrate 34 and the sealant layer 35, it may be provided on the surface opposite to the sealant layer 35 of the substrate 34.
[0089]
　As a method for laminating the substrate 34 and the sealant layer 35 may include a melt extrusion method, etc. dry lamination. In the melt extrusion method, extruding the material constituting the sealant layer 35 on a film comprising a substrate 34. In the dry lamination method, a sealant layer 35 made of pre-deposited films, a film comprising a substrate 34, bonding using an adhesive. When using a dry lamination method, as shown in FIG. 15, the lid 30 further includes an adhesive layer 36 positioned between the substrate 34 and the sealant layer 35, made of an adhesive.
[0090]
　Even in the case of manufacturing the lid 30 in the melt extrusion method, there may be a adhesive layer 36 containing an anchor coating agent used in melt extrusion methods exist in the lid 30.
[0091]
　The material constituting the adhesive layer 36, and urethane-based or epoxy-based resin of two-component curable resin comprising a base material and a curing agent. The thickness of the adhesive layer 36 is, for example, 1μm or more and 6μm or less.
[0092]
　(Seal portion)
　sealing portion 40 seals the accommodating portion 25 of the container 20 by joining a lower surface 32 of the first plane 221 and the lid 30 of the flange portion 22 from the outside. As shown in FIG. 12, the sealing portion 40, between the first plane 221 and the lower surface 32 of the lid 30 of the flange portion 22 is continuously formed over one circumference so as to surround the opening 29 in a plan view . Seal portion 40 may be one which is formed by at least partially melting at least one of the container 20 or lid 30. The sealing portion 40, such as an adhesive, the container 20 and lid 30 may be one formed by separate components. The seal portion 40 by forming between the lid 30 and the flange portion 22, it is possible to seal the housing portion 25 of the container 20 from the outside.
[0093]
　As shown in FIG. 12, the seal portion 40, the primary seal portion extending along the flange portion 22 (the main line) 42 are arranged in a long side portion 22A of the flange portion 22, toward the main seal portion 42 on the inside It has projecting projecting sealing portion (protruding line) 44. In the example shown in FIG. 12, the main seal portion 42 extends parallel to the inner edge 22x of the flange portion 22. Projecting seal portion 44 is positioned inside the aforementioned cut-out portion 23 of the flange portion 22. Reference numeral 40x denotes a inner edge of the sealing portion 40, reference numeral 40y denotes the outer edge of the seal portion 40.
[0094]
　Figure 16 is an enlarged view showing a protruding sealing portion 44 of the sealing portion 40 of the container with lid 10 shown in FIG. 12. Note that in FIG. 18 to FIG. 16 and described later, to prevent the drawing from being complicated, it is not shown edge 30y of the lid 30.
[0095]
　As shown in FIG. 16, the protruding sealing portion 44 of the sealing portion 40 includes a pair of first portion 45 that extends from the main seal portion 42 on the inside. A pair of first portion 45, intersect at the tip portion 46 positioned closest to the opening 29 side of the projecting seal portion 44. In other words, the protruding sealing portion 44 has a generally triangular shape which projects inwardly. In this case, the pressure in the housing portion 25 of the container 20 with the heat increases, the distal end portion 46 of the projecting seal portion 44 is peeled off first, followed by the first portion 45 of the protruding sealing portion 44 is peeled off, the lid 30 and the flange steam holes are formed between the parts 22.
[0096]
　6, reference numeral θ1 is an angle formed between a direction in which one of the first direction inner edge 40x extends part 45 and the other inner edge 40x of the first portion 45 extends out of the pair of first portion 45 (hereinafter, the represents 1 with the tip angle referred to). The first tip angle θ1 between the pair of first portion 45 is smaller than 180 °. For example, the first tip angle θ1 is 60 ° or more and 150 ° or less. By the first tip angle θ1 in 60 ° or more, it is possible to prevent the tip 46 of the protruding sealing portion 44 due to the force applied to Futazuke container 10 except during heating peels off. Further, by the first tip angle θ1 in the 150 ° or less, it is possible to concentrate the pressure on the sealing portion 40 at the time of heating the tip 46 of effectively projecting seal portion 44.
[0097]
　Incidentally, as long as can be peeled from the flange portion 22 faster than the protruding sealing portion 44 the main seal portion 42 when the contents are heated, does not specific shape of the protruding sealing portion 44 is limited. For example, although not shown, the protruding sealing portion 44 may further include a portion other than the first portion 45 described above. For example, the protruding sealing portion 44 is located between the main seal portion 42 and the first portion 45 may include a second portion extending in a direction different from the first portion 45.
[0098]
　[Venting mechanism]
　When the protruding sealing portion 44 peels off, steam holes are formed between the lid 30 and the flange portion 22, the vapor of the housing portion 25 through the steam holes escapes to the outside. Thus, the protruding sealing portion 44 is one of the elements constituting the venting mechanism 18 for discharging to the outside of the housing portion 25 the steam generated in the housing portion 25.
[0099]
　Venting mechanism 18 is preferably a distance from the projecting sealing portion 44 of the venting mechanism 18 to the center point 29c of the opening 29 is provided to be shorter than the distance to the center point 29c from the main seal portion 42 . For example, if the contour of the flange portion 22 is substantially rectangular, protruding sealing portion 44 of the flange portion 22 is preferably of the long side portion 22A of the flange portion 22, located in the middle in a direction long side portion 22A extends . Thus, the distance between the center point 29c of the opening 29 and the inner edge 40x of the protruding sealing portion 44 can be the shortest distance, by this, the projecting seal due to the pressure caused when the contents are heated it is possible to further increase the force acting on the part 44.
[0100]
　Is other elements constituting the venting mechanism 18, notch 23 of the above-described flange portion 22, as shown in FIGS. 12 and 16 are positioned outside of the projected seal part 44. Therefore, as compared with the case where notch 23 is not provided, to shorten the distance from the outer edge 40y of the protruding sealing portion 44 to the outer edge 22y of the flange portion 22. Thus, the protrusion seal portion 44 after being peeled off from the flange portion 22, steam is easily removed to the outside from the outer edge 22y of the flange portion 22 through the gap between the lid 30 and the flange portion 22.
[0101]
　(Notch)
　Hereinafter, the notch 23 of the flange portion 22 will be described in detail. Figure 17 is a sectional view showing a case of cutting the container with lid 10 shown in FIG. 12 at line XVII-XVII through the notch 23. Further, FIG. 18 is an enlarged plan view showing a notch 23 in order to explain the notch 23 of the flange portion 22. 17, the dotted line drawn at a location code 23 is shown in the case of forming the cutout portions 23 by notching a part of the outer edge 22y of the flange portion 22, shows an example of a cut-out area there. In the sectional view shown in FIG. 17, nothing is present in the surrounded by a dotted line area, and has a notch 23.
[0102]
　As shown in FIGS. 17 and 18, notch 23 of the flange portion 22 is at least partly in contact with the outer edge 40y of the protruding sealing portion 44 of the sealing portion 40. In other words, in the horizontal direction, and the position of the outer edge 40y of the protruding sealing portion 44 of the position and the sealing portion 40 of the outer edge 22y of the flange portion 22 of the notch 23 is at least partially coincide. Thus, as will be described later, in the step of heat sealing a lid 30 to the flange portion 22 using a hot plate, it is possible to relax the precision required in the positioning of the hot plate against the flange portion 22. Thus, it is possible to reduce the time and cost required for the process of heat sealing. Incidentally, as shown in FIG. 18, a portion of the notch 23 of the flange portion 22, even in contact with the outer edge 40y of the main seal portion 42 extending along the long side portion 22A.
[0103]
　In the example shown in FIG. 17, the lid 30 is configured so as to cover the cutout portion 23 of the flange portion 22. However, it is not limited thereto, although not shown, notch overlapping the notch 23 of the flange portion 22 may be formed on the outer edge 30y of the lid 30. In other words, the position of the notch 23 of the flange portion 22, and the position of the outer edge 30y of the portion corresponding to the notch 23 of the flange portion 22 of the lid 30 may coincide. Such container with lid 10, for example, the outer edge 30y of the outer edge 22y and the lid 30 of the flange portion 22 by punching a flange portion 22 and the lid 30 at a predetermined mold after bonding the lid 30 to the flange portion 22 of the container 20 by forming the notch may produced.
[0104]
　Incidentally, the pressure generated in the housing portion 25 at the time of heating is not only acts as a force for peeling the projecting seal portion 44, also acts as a stress to deform the container 20. If notch 23 in the flange portion 22 is provided, stress generated in the flange portion 22 due to the pressure of the housing portion 25, tends to concentrate on the notch 23. In this case, the container 20 there is a concern that easily deform the notch 23 as the starting point.
[0105]
　In contrast, in Patent Document 1 described above, the flange portion 22 and side portions 213 of the container 20, the convex portion projecting inward is formed. Protrusions are believed to act to suppress the deformation of the container 20. On the other hand, when providing a convex portion on the side 213 of the container 20, by the amount of protrusion by volume of the opening 29 is reduced. It is also conceivable that the protrusions hinder the use of the container 20. For example, if the food is accommodated in the container 20, the convex portion is considered that impede eating behavior.
[0106]
　In consideration of such problems, as shown in FIG. 18, in the vicinity of the notch 23, the side portion 213 of the container 20, it is preferable that the convex portions as in Patent Document 1 does not exist. In other words, the portion (first portion 214) corresponding to the inner notch 23 of the side 213 of the container 20, the second portion 215 portions (a pair located on opposite sides of the first portion 214 of the side 213 ) preferably form the same plane or the same curved surface (see FIG. 11). By the absence of protrusions on the side 213, it is possible to ensure a larger volume of the housing portion 25. Further, it is possible to improve the usability of the container 20.
[0107]
　On the other hand, in the present embodiment, since there are no protrusions or recesses of which the portion corresponding to the notch 23 of the side 213, considered likely container 20 is deformed as compared with the case of Patent Document 1. Such problems in mind, in this embodiment, shown in FIG. 18, it is proposed to set relatively large second tip angle θ2 at the tip portion of the notch 23. For example, it is proposed to the second tip angle .theta.2, larger than the first apex angle θ1 of the aforementioned projecting seal portion 44.
[0108]
　First, a description for the definition of the second tip angle .theta.2. 18, reference numeral P3 and code P4 represent first contact and second contact and the outer edge 40y of the main seal portion 42 of the notch 23 and the seal portion 40 of the flange portion 22 is in contact. Further, reference numeral P1 denotes the most opening 29 (accommodating portion 25) point located side of the cutout portion 23 (hereinafter, also referred to as center point). The second tip angle θ2 is defined as the angle formed between a straight line connecting the first contact point P3 and the center point P1 and a straight line connecting the second contacts P4 and the tip point P1. The first contact point P3 and the second contact P4 is also the point edge 40y of the main seal portion 42 and the outer edge 40y of the protruding sealing portion 44 is connected.
[0109]
　The second tip angle θ2 at the tip portion of the notch 23, to be larger than the first apex angle θ1 of the protruding sealing portion 44, it is possible to prevent the stress concentration in the notch 23 during heating. Thus, it is possible to suppress the deformed containers 20 starting from the notch 23 during heating. The second tip angle θ2 is, for example, 65 ° or more and 160 ° or less. Preferably, the second tip angle θ2 is greater at least 5 ° higher than the first tip angle .theta.1.
[0110]
　Preferably, notch 23 is curved at a predetermined radius of curvature at the center point P1. Thus, it is possible to prevent the stress concentration at the tip point P1 of the notch 23 at the time of heating. The radius of curvature of the notch 23 at the tip point P1 is, for example 2mm or more and 30mm or less.
[0111]
　18, reference numeral D1 represents the shortest distance between the inner edge 22x of the notch tip point of the portion 23 P1 and the flange portion 22 of the flange portion 22 (hereinafter, also referred to as a first shortest distance). Further, reference numeral D2 is at a position where the primary seal portion 42 and the protruding sealing portion 44 is connected, the shortest distance between the inner edge 22x of the inner edge 40x and the flange portion 22 of the main seal portion 42 of the sealing portion 40 (hereinafter, representing the second also referred to as the shortest distance). The first minimum distance D1 is, from the adhesion inhibiting mechanism 19 such as a notch 23 to the opening 29, it corresponds to the shortest distance in a plan view. The second shortest distance D2 is connected portion with the main seal portion 42 and the protruding sealing portion 44 is connected of the sealing portion 40 from the inner edge 40x to the opening 29 of the (portion corresponding to the point P3 or the point P4) corresponds to the shortest distance in a plan view.
　Preferably, the first minimum distance D1 between the inner edge 22x of the notch 23 and the flange portion 22 is smaller than the second minimum distance D2 between the inner edge 22x of the main seal portion 42 and the flange portion 22. Thus, when the peeling has proceeded to a connection point between the inner edge 40x of the inner edge 40x protruding sealing portion of the primary seal portion 42 of the projecting seal portion 44 at the time of heating, it is possible to discharge the vapor of the accommodation portion 25 to the outside. Thus, it is possible to reduce the pressure in the housing portion 25, the peeling of the sealing portion 40 can be prevented to proceed further. Therefore, it is possible to suppress the peeled off the main seal portion 42 at the time of heating. A second shortest distance D2 is the difference between the first minimum distance D1, preferably 1mm or more.
　The first minimum distance D1 and the second shortest distance D2 can also be defined in embodiments other than the second embodiment. Also, preferably, the relationship of the first shortest distance D1 is smaller than the second minimum distance D2 is also established in embodiments other than the second embodiment.
[0112]
　Incidentally, the fact that the first minimum distance D1 is smaller than the second minimum distance D2 is the tip portion P1 of contact inhibition mechanism 19, such as a notch 23 and later-described step portion 24 or the notch 39, the line shown in FIG. 18 than 401 is synonymous with that located inside (opening 29 side). Line 401 is a line that extends virtually the inner edge 40x of the main seal portion 42 to the outside of the area of ​​the projected seal part 44. If inner edge 40x of the main seal portion 42 is curved rather than a straight line, a line 401 extending virtually also becomes a curve having the same curvature and the inner edge 40x.
[0113]
　(Method of manufacturing a container with a lid)
　Next, an example of a method for manufacturing a container with lid 10.
[0114]
　First, by an injection molding method using a thermoplastic resin such as polypropylene to produce a container 20 having a body portion 21 and the flange portion 22 integrally formed. Then, by cutting out a portion of the outer edge 22y of the flange portion 22 to form a notch 23 in the flange portion 22. In this way, as shown in FIG. 19, it is possible to obtain a container 20 partially into the notch 23 is formed in the flange portion 22. Incidentally, the mold used in injection molding, may have a shape corresponding to the notch 23. In this case, the step of cutting away a portion of the outer edge 22y of the flange portion 22 is not necessary.
[0115]
　Subsequently, filling contents into the accommodating portion 25 of the container 20. In addition, to prepare the lid 30. Thereafter, it places the lid 30 on the upper surface of the flange portion 22 of the container 20. Next, the portion to the seal portion 40 is formed out of the lid 30, by heating from the upper surface 31 side using a hot plate, the sealant layer 35 of the lid 30 is melted, heat sealing the lid 30 to the flange portion 22 to. Figure 20 is a plan view showing an example of a process for heat-sealing the lid 30 to the flange portion 22. In Figure 20, a heating unit 51 for heating the lid 30 in contact with the upper surface of the lid 30 of the heat plate is shown as the hatched region.
[0116]
　As can be seen from a comparison of FIGS. 12 and 20, the inner edge 51x of the heating unit 51 has the same contour as the inner edge 40x of the protruding sealing portion 44 of the sealing portion 40. Further, the portion corresponding to the main seal portion 42 of the outer edge 51y of the heating unit 51 has the same contour as the outer edge 40y of the main seal portion 42. On the other hand, the portion corresponding to the protruding sealing portion 44 of the outer edge 51y of the heating portion 51 extends so as to overlap with the cutout portion 23 of the container 20. That is, the portion corresponding to the protruding sealing portion 44 of the outer edge 51y of the heating unit 51 does not have the same contour and the outer edge 40y of the protruding sealing portion 44. For example, the portion corresponding to the protruding sealing portion 44 of the outer edge 51y of the heating portion 51 extends in the same straight line and the portion corresponding to the main seal portion 42 of the outer edge 51y of the heating portion 51.
[0117]
　Therefore, even when the position of the heating portion 51 of the heat plate relative to the outer edge 22y of the flange portion 22 in the heat sealing process is shifted from the predetermined position, there is a high possibility that it is possible to obtain an appropriate protruding sealing portion 44 Become. Thus, it is possible to reduce the time and cost required for the process of heat sealing.
[0118]
　A part of the outer edge 51y of the heating unit 51, so extend so as to overlap with the cutout portion 23 of the container 20, the projecting seal portion 44, it is possible that the outer edge 40y is formed in contact with the notch 23. In other words, the position of the outer edge 40y of the projecting seal portion 44, the position of the notch 23 is coincident. Thus, after the peeling projecting seal portion 44, the steam passes through the gap between the lid 30 and the flange portion 22 and easily removed from the outer edge 22y of the flange portion 22 to the outside of the notch 23. That is, it is possible to enhance the 蒸通 of container with lid 10.
[0119]
　Further, in the present embodiment, in the vicinity of the notch 23, on the side 213 of the container 20 there is no convex portion or concave portion. Thus, the volume of the housing portion 25 larger by ensuring, or can improve the usability of the container 20. Further, in this embodiment, since the second tip angle θ2 at the tip portion of the notch 23 is larger than the first apex angle θ1 of the protruding sealing portion 44, prevent the stress concentration in the notch 23 at the time of heating can do. Therefore, even in the portion corresponding to the inner notch 23 of the side 213 of the container 20 even when the convex portion or the concave portion does not exist, it is possible to prevent the container 20 is deformed when heated.
[0120]
　Note that it is possible to make various modifications to the embodiments described above. Hereinafter, with reference to the drawings as needed, a modified example will be described. The following drawings used in the description and the following description, the parts that may be configured similarly to the embodiment described above will be referred to with the same reference numerals as those used for corresponding parts in the embodiment described above, and overlapping description will be omitted. Also, when the effects obtained in the embodiment described above it is clear that also obtained in the modification, it may be omitted from the description.
[0121]
　(Modification of the recess of the flange portion)
　in the embodiment described above, the cutout portion 23 of the flange portion 22 is an example having a generally triangular shape in plan view. However, it is not limited thereto, as shown in FIG. 21, notch 23 may have a trapezoidal shape in plan view. In this case, the contour of the notch 23 may include a straight portion 23a extending in parallel to the inner edge 22x of the flange portion 22. Straight portion 23a is a set of distance that is the shortest between the inner edge 22x of the flange portion 22. In this case, the tip point P1 described above, as shown in FIG. 21, is defined as the midpoint of the straight portion 23a.
[0122]
　In the example shown in FIG. 21, preferably, the second tip angle θ2 formed between the straight line connecting the first contact point P3 and the center point P1 and a straight line connecting the second contacts P4 and the tip point P1 is, first the projecting seal portion 44 greater than 1 tip angle θ1. Thus, it is possible to prevent the stress concentration in the notch 23 during heating.
[0123]
　(Modification of the container)
　in the embodiment described above, an example in which notch 23 each are formed of a pair of long side portions 22A of the flange portion 22. However, it is not limited thereto, as shown in FIG. 22, the notch portion 23 may be formed only on one of the pair of long side portions 22A of the flange portion 22.
[0124]
　(Container Modification)
　In the embodiment described above, the flange portion 22 of the container 20, an example is shown having a contour of generally rectangular shape (substantially rectangular shape), it is not limited thereto, as shown in FIG. 23, the flange portion 22 may have a circular profile. In this modification, the portion located outside of the protruding sealing portion 44 of the sealing portion 40 of the outer edge 22y of the flange portion 22 to form a notch 23 which is in contact with the outer edge 40y of the protruding sealing portion 44. This makes it possible to relax the precision required in the positioning of the hot plate against the flange portion 22. Further, it is possible to increase the蒸通of container with lid 10.
[0125]
　Further, in the embodiment described above, the adhesion inhibiting mechanism 19 which is formed in the flange portion 22, an example including a notch 23 formed on the outer edge 22y of the flange portion 22. However, this is it is not a limited, also in the second embodiment, as in the first modification or the third modification of the first embodiment, as shown in FIG. 24, the adhesion inhibiting mechanism 19 is a step part 24 may contain. The step portion 24 is continuously provided on the outer edge of the first plane 221 of the flange portion 22, and flange wall portion 241 extending downward, is provided continuously at the bottom of the flange wall portion 241, and the second plane 242 extending in the horizontal direction, including.
[0126]
　As shown in FIG. 24, the step portion 24 of the flange portion 22 is at least partly in contact with the outer edge 40y of the protruding sealing portion 44 of the sealing portion 40. In other words, in the horizontal direction, and the position of the outer edge 40y of the protruding sealing portion 44 of the position and the sealing portion 40 of the stepped portion 24 in the first plane 221 is connected, at least partially coincide. Thus, as with the adhesion inhibiting mechanism 19 includes a notch 23, in the step of heat sealing a lid 30 to the flange portion 22 using a hot plate, the precision required in positioning of the hot plate against the flange portion 22 it can be relaxed. Thus, it is possible to reduce the time and cost required for the process of heat sealing.
[0127]
　(Modification of the projecting seal portion)
　in the embodiment described above, the protruding sealing portion 44 includes a pair of first portion 45 that extends from the main seal portion 42 inwardly, a pair of first portion 45, projecting an example which intersect at the distal end 46 positioned closest to the opening 29 side of the sealing portion 44. However, it is not limited thereto, as shown in FIG. 25, the projecting seal portion 44 may have a curved shape so as to be convex toward the inside. Further, as shown in FIG. 26, the projecting seal portion 44 is connected to an end portion of the opening portion 29 side of the pair of first portion 45, has a tip portion 46 extending parallel to the inner edge 22x of the flange portion 22 it may be. In this case, the tip point P2 of the distal end portion 46 is defined as the midpoint of the inner edge of the distal end portion 46 extending parallel to the inner edge 22x.
[0128]
　Although described several modifications of the embodiment described above, of course, it is also possible to apply a combination of a plurality of modification as appropriate.
[0129]
　 Third Embodiment
　The following describes a third embodiment of the present invention. Third embodiment also, as in the first embodiment described above, and aims to solve the problem of flange portion is easily released steam warped.
[0130]
　The following describes the container with lid 10 of the third embodiment. In the third embodiment, the first or second embodiment and the same parts may be omitted the detailed description are denoted by the same reference numerals. Also, when the effects obtained in the first or second embodiment it is apparent that also obtained in the third embodiment, may be omitted from the description.
[0131]
　(Container with lid)
　with reference to first to FIG. 27 through FIG. 28B, an outline of the container with lid 10. Figure 27 is an exploded view of members constituting a container with lid 10, Figure 28A is a plan view of a container with lid 10. The Figure 28B is a sectional view showing a when viewed along the vessel with lid shown in FIG. 28A to XXVIIIB-XXVIIIB line. Container with lid 10, as in the first embodiment and the second embodiment, the container 20 accommodating portions 25 are formed for accommodating the contents, a cover 30 for covering the accommodating portion 25 of the container 20, the lid comprising seal portion joining the 30 to the container 20 (joint) 40, a.
[0132]
　[Vessel]
　container 20 includes as in the first embodiment and the second embodiment, a body portion 21 which defines the accommodating portion 25, a flange portion 22 which is connected over one circumference on the top of the barrel 21, the . In FIG 28A, a pair of long sides 22a are parallel to each other, a pair of short sides 22b are parallel to each other, and although examples in which a long side 22a and a short side 22b are perpendicular is shown, It is not limited to this. For example, a pair of long sides 22a, may be non-parallel to each other, a pair of short sides 22b may be non-parallel to each other. Also, an angle made by the long sides 22a and short 22b may be offset from 90 degrees.
[0133]
　In Figure 28A also inner 22x and the outer edge 22y of the flange portion 22 is shown an example that extends linearly from one corner 22c respectively to the other corner portion 22c, but is not limited thereto . Although not shown, it may be such as partially depressions or protrusions with the inner edge 22x and the outer edge 22y of the flange portion 22 is formed in plan view.
[0134]
　[Lid]
　The lid 30 is disposed on the first plane 221 of the upper surface of the flange portion 22 so as to cover the opening 29 of the housing portion 25 of the container 20, it is joined by the seal portion 40 to the first plane 221 of the flange portion 22 there. In this embodiment, the contour of the lid 30 is the same as the contour of the flange portion 22 is formed in a substantially rectangular shape. The lower surface 32 of the lid 30 is configured to be joined to the first plane 221 of the flange portion 22.
[0135]
　The melting point of the material constituting the sealant layer 35 is preferably 120 ° C. or higher, more preferably 130 ° C. or higher. Also, if further comprising a heat-softenable resin layer 37 which cover 30 will be described later, the melting point of the material constituting the sealant layer 35 is higher than the softening temperature of the resin constituting the heat-softened resin layer 37 is preferred. The melting point of the material constituting the sealant layer 35 is lower than the melting point of the resin constituting the base material 34.
[0136]
　(Seal portion)
　sealing portion 40 seals the accommodating portion 25 of the container 20 by joining a lower surface 32 of the first plane 221 and the lid 30 of the flange portion 22 from the outside. As shown in FIG. 28A, the seal section 40 between the first plane 221 and the lower surface 32 of the lid 30 of the flange portion 22 is continuously formed over one circumference so as to surround the accommodating portion 25 in a plan view . Seal portion 40 may be one which is formed by at least partially melting at least one of the container 20 or lid 30. The sealing portion 40, such as an adhesive, the container 20 and lid 30 may be one formed by separate components. The seal portion 40 by forming between the lid 30 and the flange portion 22, it is possible to seal the housing portion 25 of the container 20 from the outside. In FIG. 28B, although the sealing portion 40 is shown an example which is formed on the lid 30 side, it is not limited thereto. For example, the seal portion 40, which may be across both the lid 30 and the flange portion 22, also, the sealing portion 40 may be formed in the flange portion 22 side.
[0137]
　As shown in FIG. 28A, the seal section 40, the primary seal portion extending along the inner edge 22x or outer edge 22y of the flange portion 22 (the main line) 42 are arranged in a long side portion 22A of the flange portion 22, the main seal portion has projecting sealing portion protruding inward and (projecting line) 44, from 42. Note that the long side portion, a portion extending along the longer side 22a of the flange portion 22. Further, a portion extending along the short side 22b of the flange portion 22, referred to as short side portions 22B.
[0138]
　Figure 29 is an enlarged view showing a protruding sealing portion 44 of the sealing portion 40 of the container with lid 10 shown in FIG. 28A. As shown in FIG. 29, the protruding sealing portion 44 of the sealing portion 40 includes a first portion 45 of the pair extending from the main seal portion 42 on the inner side, the tip portion connecting the pair of first portion 45 (second portion ) contains a 46. Therefore, the protruding sealing portion 44 will have a generally triangular shape which projects inwardly. In this case, the pressure in the housing portion 25 of the container 20 with the heat increases, the distal end portion of the substantially triangular protruding inwardly of the protruding sealing portion 44, i.e. distal portion 46 is peeled off the lid in place of the tip portion 30 is peeled from the first plane 221 of the flange portion 22.
[0139]
　Incidentally, as long as can be peeled from the flange portion 22 faster than the protruding sealing portion 44 the main seal portion 42 when the contents are heated, does not specific shape of the protruding sealing portion 44 is limited. For example, although not shown, the protruding sealing portion 44 may further include a first portion 45 and a portion other than the tip of the above.
[0140]
　[Venting mechanism]
　When the protruding sealing portion 44 is peeled from the flange portion 22, steam holes are formed between the lid 30 and the flange portion 22, the vapor of the housing portion 25 through the steam holes escapes to the outside. Accordingly, in this embodiment, the protruding sealing portion 44, constitute a venting mechanism 18 for discharging the steam generated in the housing portion 25 to the outside of the housing portion 25.
[0141]
　Venting mechanism 18 is preferably the distance from the center point 29c of the opening 29 is provided such that the shortest distance. For example, if the contour of the flange portion 22 is substantially rectangular, protruding sealing portion 44 of the flange portion 22 is preferably of the long side portion 22A of the flange portion 22, located in the middle in the direction long side 22a extends. Thus, the distance between the center point 29c of the opening 29 and the inner edge 40x of the protruding sealing portion 44 can be the shortest distance, by this, the projecting seal due to the pressure caused when the contents are heated it is possible to further increase the force acting on the part 44.
[0142]
　Incidentally, when the contents are heated in a microwave oven, the contents of the temperature of the vessel 20 is also increased with the flange portion 22 and the container 20 is deformed sometimes or crimped warp upward. Alternatively, when the rigidity of the container 20 is low, the flange portion 22 deforms the container 20 when joining the cover 30 to the container 20 may or crimped warp upward. When such deformation occurs, the formed steam holes becomes easy to be closed between the lid 30 and the flange portion 22. In consideration of such problems, in the present embodiment, it is proposed to form the convex portion 26 in the first plane 221 of the flange portion 22. In the present embodiment, the convex portion 26 functions as suppressing adhesion suppression mechanism 19 that the lower surface of the upper surface and the lid 30 of the flange portion 22 comes into close contact when the contents are heated.
[0143]
　(Convex)
　or less, with reference to FIGS. 29 and 30, will be described protrusion 26. Figure 30 is a cross-sectional view showing a case where a container with lid of FIG. 29, taken along line XXX-XXX through the convex portion 26. Line XXX-XXX is parallel to the direction in which the extending (long side 22a in this case) side of the flange portion 22 of the convex portion 26 is formed.
[0144]
　As shown in FIG. 30, the convex portion 26 is a portion that protrudes from the first plane 221 of the flange portion 22 upward. As shown in FIGS. 29 and 30, the convex portion 26 is formed in a portion overlapping with the lid 30 a outside the protruding sealing portion 44 of the first plane 221 of the flange portion 22. Specifically, the convex portion 26, side flanges projecting sealing portion 44 is formed with projecting seal portions projecting portion 26 when viewed along a direction perpendicular to the direction in which the extending (here long side 22a is) 44 and is to overlap, is disposed. That is, in contact with the lower surface 32 of the apex and the lid 30 of the protrusion 26. Therefore, as shown in FIG. 30, in the periphery of the convex portion 26, it is possible to form the gap 28 between the first plane 221 of the lower surface 32 and the flange portion 22 of the lid 30.
[0145]
　As shown in FIG. 29, the convex portion 26 is formed on the outer edge 22y side of the portion of the flange portion 22 of the first plane 221 of the flange portion 22. The "edge closer", in a direction perpendicular to the direction in which the side of the flange portion 22 of the convex portion 26 is formed extending a distance from the protrusion 26 to the outer edge 22y is than the distance from the protrusion 26 to the inner edge 22x which means that even small.
[0146]
　Convex portion 26, preferably, the lid 30 at the position of virtually extended line (dotted line code 401 is affixed in FIG. 29) the inner edge 40x of the main seal portion 42 to the outside of the area of ​​the projected seal part 44 so that it is possible to form a gap 28 between the flange portion 22, and. Thus, when the separation of the projecting seal portion 44 has progressed to a connection point between the inner edge 40x of the inner edge 40x and the protruding sealing portion of the primary seal portion 42 at the time of heating, a steam accommodating part 25 can be discharged to the outside. Thus, it is possible to reduce the pressure in the housing portion 25, the peeling of the sealing portion 40 can be prevented to proceed further. Therefore, it is possible to suppress the peeled off the main seal portion 42 at the time of heating. Incidentally, the inner edge 40x of the main seal portion 42 be a curve rather than a straight line, a line 401 extending virtually also becomes a curve having the same curvature and the inner edge 40x.
[0147]
　In Figure 30, reference numeral H2 is representative of the height of the convex portion 26. The height H2, from the first plane 221 of the flange portion 22 to the tip point of the convex portion 26, a distance in the normal direction of the flange portion 22. Position of the first plane 221 of the flange portion 22 is defined as the position of the surface to be bonded to the lower surface 32 of the lid 30 by the seal portion 40 of the flange portion 22. Center point of the convex portion 26 is defined as the point furthest away from the first plane 221 of the flange portion 22 in the normal direction of the flange portion 22 of the protrusion 26. The height H2, is, for example 0.5mm or more and 5.0mm or less.
[0148]
　Figure 31 is a sectional view showing a modification of the flange portion. As shown in FIG. 31, the portion corresponding to the convex portion 26 of the lower surface 222 of the flange portion 22 may have recesses 27 are formed. When forming the protrusion 26 in the first plane 221 of the flange portion 22 by embossing, recesses 27 shown in FIG. 31 is formed on the lower surface 222 of the flange portion 22. On the other hand, when forming the convex portion 26 of the flange portion 22 by an injection molding method, it can be obtained as shown in FIG. 30, a convex portion 26 without forming the recess 27 on the lower surface 222 of the flange portion 22.
[0149]
　Preferably, as shown in FIGS. 29 and 30, the convex portion 26, when viewed protrusions 26 along the direction in which the side of the flange portion 22 of the convex portion 26 is formed extends, and a convex portion 26 so that the main seal portion 42 is at least partially overlap, it is disposed. Thereby, it is possible to prevent the lid 30 will be curled up by the influence of the convex portion 26 at a location remote from the protruding sealing portion 44.
[0150]
　Figure 28A, as shown in FIGS. 29 and 30, the flange portion 22 may include a protruding portion 26 of the two above arranged with a gap 26s. In this case, preferably, the two protrusions 26, the outer edge 22y of the flange portion 22 without intersecting the two protrusions 26 with passing through the center point 29c and the gap 26s of openings 29 (accommodating portion 25) in a plan view so that it is possible to draw a straight line extending, it is arranged. Linear Lc of FIG. 28A and FIG. 29 is an example of such a drawn straight line. This can cause omission of the steam accommodating part 25 through the gap 26s between the two protrusions 26 effectively to the outside. In this case, since the adhesion between the flange portion 22 and the lid 30 is suppressed even in the gap 26s, it can be considered that the gap 26s is also a component of the adhesion suppressing mechanism 19.
[0151]
　It explained straight Lc of FIG. 28A and FIG. 29. Straight Lc is a straight line passing through the center point 29c and the tip point 44c of the projecting seal portion 44 of the opening 29 (accommodating portion 25). Preferably, two protrusions 26, so that in this way a straight line drawn Lc reaches the outer edge 22y of the flange portion 22 without intersecting the two protrusions 26 with through the gap 26s, are arranged.
[0152]
　Figure 32 is a cross-sectional view showing a case where a container with lid 10 shown in FIG. 29 taken along Lc line. FIGS. 33A and 33B FIG. 32 and described below, for reference, showing the protrusions 26 present on the depth of the page surface by a dotted line. According to this embodiment, by forming the first plane 221 into two protrusions 26 of the flange portion 22, as shown in FIG. 32, the outer edge of the protruding sealing portion 44 positioned on the opposite side of the center point 44c around the 40y, between the first plane 221 of the lower surface 32 and the flange portion 22 of the lid 30, it is possible to form a gap 28 communicating with the outside of the container with lid 10.
[0153]
　Although not shown, the first plane 221 of the flange portion 22, three or more protrusions 26 may be formed.
[0154]
　Further, in FIG. 30, the cross-sectional shape of the convex portion 26 is an example a semicircular shape, to form a gap 28 between the first plane 221 of the lower surface 32 and the flange portion 22 of the lid 30 Wherever possible, the cross-sectional shape of the convex portion 26 is not particularly limited.
[0155]
　(Method of manufacturing a container with a lid)
　Next, an example of a method for manufacturing a container with lid 10.
[0156]
　First, by an injection molding method using a thermoplastic resin such as polypropylene, the body portion 21 is integrally formed to produce a container 20 having a flange portion 22 and the convex portions 26. Further, to prepare a lid 30 having a contour corresponding to the flange portion 22 of the container 20. Next, filling contents into the accommodating portion 25 of the container 20. Thereafter, it places the lid 30 on the upper surface of the flange portion 22 of the container 20. Next, the portion to the seal portion 40 is formed out of the lid 30, by heating from the upper surface 31 side by using a hot plate to melt the sealant layer 35 of the lid 30. Thereby, it is possible to form the seal portion 40 for fixing the lower surface 32 of the lid 30 to the first plane 221 of the flange portion 22 of the container 20. In this way, a container 20, a lid 30 joined to the first plane 221 of the flange portion 22 of the container 20 through the sealing portion 40, it is possible to obtain a container with lid 10 with a.
[0157]
(Method of heating the contents)
　Next, an example of a method for heating the contents housed in the housing portion 25 of the container 20 of the container with lid 10 will be described with reference to FIGS. 33A and 33B. Both FIGS. 33A and 33B is a container with lid 10 when the heating of the contents is a sectional view showing a when viewed along a straight line Lc shown in FIG. 28A.
[0158]
　First, the bottom portion 211 is the container with lid 10 in a state of facing downward of the container 20 is placed inside the microwave oven. Next, the contents are heated using a microwave oven. Thus, the temperature of the contents is increased, along with this, moisture contained in the contents is increased the pressure in the housing portion 25 and evaporated. Therefore, As shown in FIG. 33A, the portion in contact with the housing portion 25 of the lower surface 32 of the lid 30 is pressed by the pressure P of the steam, the lid 30, the bulge 38 bulges upward is formed.
[0159]
　When the pressure in the accommodating portion 25 is further increased with the heating, bulges 38 of the lid 30 is further expanded, reaches the protruding sealing portion 44 of the sealing portion 40 as shown in FIG. 33A. In places where the projecting seal portion 44 are formed, the lid 30 is force pulled upward becomes larger than the bonding strength of the projecting seal part 44, the lid 30 is peeled from the flange portion 22.
[0160]
　When the lid 30 is peeled off from the flange portion 22, as shown in FIG. 33B, the steam holes 251 are formed between the first plane 221 of the lower surface 32 and the flange portion 22 of the lid 30. Here, according to this embodiment, the convex portion 26 is formed on the first plane 221 of the flange portion 22 in the outer side of the protruding sealing portion 44. Therefore, even when the flange portion 22 is deformed upward, it is possible to ensure a gap 28 between the first plane 221 of the lower surface 32 and the flange portion 22 of the lid 30, by which the steam holes 251 There can be prevented from being closed. Therefore, it is possible to let escape the stable external steam accommodating part 25 through the steam holes 251. This can reduce the pressure in the housing portion 25. Thus, while suppressing the like rupture of the lid 30 occurs, it is possible to heat the contents by using the microwave oven.
[0161]
　(First Modification)
　Next, with reference to FIGS. 34 to 35E, a description will be given of a first modification of the present embodiment. In the first modification, to produce a container 20 of the container with lid 10 in a sheet molding method. In a first modification, a detailed description is given the same reference numerals in the form of the same parts of the embodiment described above will be omitted. Also, when the effects obtained in the embodiment described above it is clear that also obtained in this modification, it may be omitted from the description.
[0162]
　Figure 34 is a plan view showing a container with lid 10 according to a first modification. In a first variant, the flange portion 22 of the container 20 has a substantially square contour including four equal side length. Further, in the present embodiment, the protruding sealing portion 44 of the sealing portion 40 is formed in the corner portion 22c of the flange portion 22. For example, the protruding sealing portion 44 has: a first side one of the first portion 45 connected to the main seal portion 42 extending along the 22f of the flange portion 22, which is connected to the first side 22f of the flange portion 22 including the other first portion 45 of which is connected to the main seal portion 42 extending along the second side 22 g, a. Angle and one of the first portion 45 and the other first portion 45 of the forms is, for example, 90 °.
[0163]
　Also in this embodiment, preferably, the first plane 221 of the flange portion 22, two protrusions 26 are formed. Also in this embodiment, preferably, the two protrusions 26, the flange portion 22 without intersecting the two protrusions 26 with passing through the center point 29c and the gap 26s of openings 29 (accommodating portion 25) in a plan view so that it is possible to draw a straight line leading to the outer edge 22y, it is arranged. For example, two protrusions 26 linearly Lc passing through the center point 29c and the tip point P2 of the protruding sealing portion 44 of the opening 29 (accommodation portion 25), without intersecting the two protrusions 26 with through gaps 26s as leading to the outer edge 22y of the flange portion 22, it is disposed.
[0164]
　(Method of manufacturing a container with a lid)
　Next, an example of a method for manufacturing a container with lid 10. Here, allocating a plurality of containers 20 into a single sheet 15, a method for manufacturing a plurality of container with lid 10 at the same time. Note that the steps described below may be applied to the sheet 15 conveyed in a predetermined direction.
[0165]
　First, to prepare a plastic sheet 15. Next, As shown in FIG. 35A, the sheet 15 by a sheet molding method, a body portion 21 which defines the accommodating portion 25 to form a plurality. Furthermore, by embossing, to form the convex portion 26 to the seat 15. Barrel 21 protrudes on the lower surface side of the sheet 15. Protrusion 26 protrudes on the upper surface of the sheet 15.
[0166]
　Next, filling contents into the accommodating portion 25. Thereafter, it places the lid 30 on the upper surface of the sheet 15. Next, by heating the cover 30 from the top surface 31 side, as shown in FIG. 35B, to form the seal portion 40 including the main seal portion 42 and the protruding sealing portion 44.
[0167]
　Thereafter, a stack of sheets 15 and cover 30, punched with the mold having a shape corresponding to the corner portion 22c of the flange portion 22. Thus, as shown in FIG. 35C, it is possible to obtain the chamfered corners 22c. In the case of forming a flange portion 22 having an angular corners may not implement such stamping process.
[0168]
　Then, a stack of sheets 15 and the lid 30 is separated into each compartment surrounded by the seal portion 40. For example, first, as shown in FIG. 35D, along the conveying direction F1 of the sheet 15 to cut a stack of sheets 15 and lid 30. Next, as shown in FIG. 35E, in the direction perpendicular to the conveying direction F1 of the sheet 15, cutting the stack of sheets 15 and lid 30. In this way, it is possible to produce a plurality of container with lid 10 at the same time.
[0169]
　In this modification, by forming a convex portion 26 in the first plane 221 of the flange portion 22 in the outer side of the protruding sealing portion 44 forming the venting mechanism 18, the lower surface 32 and the flange portion 22 of the lid 30 1 between the flat 221 can be secured gap 28, which makes it possible to prevent the steam holes 251 are closed. Therefore, it is possible to let escape the stable external steam accommodating part 25 through the steam holes 251.
[0170]
　In this modification, the container with lid 10 provided with a vessel 20 that is created by the sheet forming method, an example of arranging the protruding sealing portion 44 and the convex portion 26 in the corner portion 22c of the container 20, It is not limited to this. Also in container with lid 10 provided with a vessel 20 that is created by the sheet forming method, as in the embodiment described above, the projecting seal portions 44 and the convex portion 26, of one side of the flange portion 22, the one side it may be disposed in the middle in the extending direction. Conversely, in the container with lid 10 which comprises a container 20 made by injection molding, the projecting seal portions 44 and the protrusions 26 may be disposed in the corner portion 22c of the container 20.
[0171]
　Incidentally, the rigidity of the flange portion 22 at the corner portion 22c of the flange portion 22 is generally of one side of the flange portion 22, higher than the rigidity of the intermediate portion in the direction in which the one side extends. The thickness of the flange portion 22 of the container 20 that is created by the sheet forming method is generally smaller than the thickness of the flange portion 22 of the container 20 is produced by injection molding. In consideration of these points, the container with lid 10 provided with a vessel 20 that is created by the sheet forming method, the protruding sealing portion 44 and the convex portion 26 is disposed in a corner portion 22c of the container 20 having a higher stiffness it is preferable.
[0172]
　(Second Modification)
　Next, with reference to FIG. 36 through FIG. 38C, a description of a second modification of the present embodiment. In the second modification, by providing a heat-softenable resin layer 37 on the lid 30 constitutes a venting mechanism 18. In the second modification, a detailed description is given the same reference numerals in the form of the same parts of the embodiment described above will be omitted. Also, when the effects obtained in the embodiment described above it is clear that also obtained in this modification, it may be omitted from the description.
[0173]
　Figure 36 is a plan view showing a container with lid 10 according to the present modification. Further, FIG. 37 is a sectional view showing a when viewed along the container with lid 10 shown in Figure 36 the straight line Lc. In this modification, the straight line Lc, as well passes through the center point 29c of the opening 29 (accommodation portion 25), a direction orthogonal to the direction in which one side of venting mechanism 18 of one side of the flange portion 22 is formed extending is a straight line extending.
[0174]
　As shown in FIG. 37, the lid 30 includes a substrate 34, in addition to the sealant layer 35 and the adhesive layer 36, further comprises a heat-softenable resin layer 37 located between the substrate 34 and the sealant layer 35. Heat-softenable resin layer 37, the adhesive layer 36 in contact with the substrate 34, is positioned between the sealant layer 35. Although not shown, heat-softenable resin layer 37, the adhesive layer 36 in contact with the sealant layer 35, may be positioned between the substrate 34. Furthermore, if the lid 30 comprises a support, a heat-softenable resin layer 37 may be positioned between the support and the sealant layer 35.
[0175]
　As shown in FIGS. 36 and 37, heat-softenable resin layer 37 spreads to reach the outer edge 40y of the main seal portion 42 from the inner edge 40x of the main seal portion 42 of at least the sealing portion 40. By thus providing a heat-softenable resin layer 37, facilitating the release of the main seal portion 42 by utilizing the gap 37a generated inside of the lid 30 by, as described later, heat-softenable resin layer 37 is softened can do. In this modification, a portion overlapping with out heat softenable resin layer 37 of the lid 30 constitute a venting mechanism 18.
[0176]
　In this modification, preferably, venting mechanism 18, the distance from the center point 29c of the opening 29 (accommodating portion 25) is provided such that the shortest distance. For example, if the contour of the flange portion 22 is substantially rectangular, heat-softenable resin layer 37, among the long side portion 22A of the flange portion 22 is provided so as to include an intermediate in a direction long side 22a extends.
[0177]
　In this modification, as shown in FIG. 36, an outer heat-softening resin layer 37 constituting the venting mechanism 18 of the first plane 221 of the flange portion 22 to the portion overlapping the cover 30, the first protrusions 26 projecting from the plane 221 upward is formed.
[0178]
　Heat-softenable resin layer 37 has the following softening temperature 60 ° C. or higher 110 ° C., composed of a resin or resin composition. As the resin constituting the heat-softened resin layer 37, an ethylene - vinyl acetate copolymer, or a resin containing polyamide and nitrocellulose and the polyethylene wax may be mentioned. The resin containing polyamide and nitrocellulose and polyethylene wax, DIC Graphics Corp. of MWOP varnish (softening temperature: 105 ° C.), or the like can be used.
[0179]
　The thickness of the heat-softened resin layer 37 is preferably 1μm or more and 5μm or less. When the thickness of the heat-softenable resin layer is less than 1 [mu] m, when heating the container with lid 10 in a microwave oven, the gap 37a is less likely to occur between the substrate 34 and the sealant layer 35. Also, when the thickness of the heat-softened resin layer 37 exceeds 5 [mu] m, by the pattern of heat-softenable resin layer 37, when the wound laminated film for constituting the cover 30 into a roll, raised part occurs, it may occur a disadvantage that the film would extend that portion.
[0180]
　Preferably, the adhesive strength of the portion of which heat softenable resin layer 37 is provided in the lid 30 is in the first temperature region of 25 ° C. below are 700 (g / 15mm) or more, more than 80 ° C. The second temperature area In is 300 (g / 15mm) or less. Thus, inhibiting the handling at the time of room temperature or during freezing, transporting, by storage or the like, that delamination between or between the adhesive layer 36 and the sealant layer 35 of heat softenable resin layer 37 and the substrate 34 occurs be able to. Further, when heated in a microwave oven, the gap 37a is likely to occur between the substrate 34 and the sealant layer 35. Incidentally, the seal strength is the average value when measured by 180 ° peel at a tensile speed of 300 mm / min using a Tensilon tensile tester (manufactured by Orientec Ltd. RTC-1310A).
[0181]
　Heat-softenable resin layer 37 can be formed by using a coating method such as gravure printing method.
[0182]
(Method of heating the contents)
　Next, an example of a method for heating the contents housed in the housing portion 25 of the container 20 of the container with lid 10 will be described with reference to FIGS. 38A through FIG. 38C. Both FIGS. 38A through FIG. 38C, the container with lid 10 when the heating of the contents is a sectional view showing a when viewed along a straight line Lc shown in FIG. 36.
[0183]
　When moisture contained in the contents is increased pressure in the housing portion 25 by evaporation, as shown in FIG. 38A, the portion in contact with the housing portion 25 of the lower surface 32 of the lid 30 is pressed by the pressure P of the steam, the lid 30 the bulge portion 38 bulging upward is formed. The lid 30 is heated, the temperature of each layer of the lid 30 is raised.
[0184]
　Here, in this modification, the lid 30 comprises a heat-softenable resin layer 37. Therefore, as shown in FIG. 38B, heat-softenable resin layer 37 is deformed and softened, as a result, gaps 37a is formed between the substrate 34 and the sealant layer 35. As a result, in the portion where the heat softened resin layer 37 is provided tends elongation sealant layer 35, the lid 30 tends to inflate upward. Therefore, portions overlapping with out heat softenable resin layer 37 of the main seal portion 42 of the sealing portion 40, as compared with the other parts of the primary seal portion 42 of the sealing portion 40, a force to pull the lid 30 upwardly There join more strongly. Force to pull the lid 30 upwardly becomes larger than the bonding strength of the projecting seal portion 44, as shown in FIG. 38C, the lid 30 is steam hole 251 is peeled from the flange portion 22 is formed.
[0185]
　In this modification, by forming an adhesion inhibiting mechanism 19 such as a protrusion 26 in the first plane 221 of the flange portion 22 at the outside of the heat-softenable resin layer 37 constituting the venting mechanism 18, the lid 30 between the first plane 221 of the lower surface 32 and the flange portion 22 can be secured gap 28, which makes it possible to prevent the steam holes 251 are closed. Therefore, it is possible to let escape the stable external steam accommodating part 25 through the steam holes 251.
[0186]
　Although not shown, the modification shown in the example, the type of the venting mechanism 18 constituted by a heat-softenable resin layer 37, notch 23 or stepped portion shown in the first embodiment and the second embodiment described above it may be combined with the type of contact inhibition mechanism 19, such as 24.
[0187]
　 Fourth Embodiment
　The following describes a fourth embodiment of the present invention. Fourth embodiment also, as in the first embodiment described above, and aims to solve the problem of flange portion is easily released steam warped.
[0188]
　The following describes the container with lid 10 of the fourth embodiment. In the fourth embodiment, the same parts as those of the first to third embodiments may be omitted the detailed description are denoted by the same reference numerals. Also, when the effects obtained in the first to third embodiments it is apparent that also obtained in the fourth embodiment, may be omitted from the description.
[0189]
　(Container with lid)
　with reference to first to FIG. 39 to FIG. 40B, an outline of the container with lid 10. Figure 39 is an exploded view of members constituting a container with lid 10, FIG. 40A is a plan view of a container with lid 10. The Figure 40B is a sectional view showing a when viewed along the vessel with lid shown in FIG. 40A to XXXXB-XXXXB line. Container with lid 10, as in the first embodiment to the third embodiment, the container 20 accommodating portions 25 are formed for accommodating the contents, a cover 30 for covering the accommodating portion 25 of the container 20, the lid comprising seal portion joining the 30 to the container 20 (joint) 40, a.
[0190]
　[Vessel]
　container 20 includes as in the first through third embodiments, the body portion 21 which defines the accommodating portion 25, a flange portion 22 which is connected over one circumference on the top of the barrel 21, the .
[0191]
　In FIG 40A, a pair of long sides 22a are parallel to each other, a pair of short sides 22b are parallel to each other, and although examples in which a long side 22a and a short side 22b are perpendicular is shown, It is not limited to this. For example, a pair of long sides 22a, may be non-parallel to each other, a pair of short sides 22b may be non-parallel to each other. Also, an angle made by the long sides 22a and short 22b may be offset from 90 degrees.
[0192]
　In Figure 40A also inner 22x and the outer edge 22y of the flange portion 22 is shown an example that extends linearly from one corner 22c respectively to the other corner portion 22c, but is not limited thereto . Although not shown, it may be such as partially depressions or protrusions with the inner edge 22x and the outer edge 22y of the flange portion 22 is formed in plan view.
[0193]
　[Lid]
　The lid 30 is disposed on the first plane 221 of the upper surface of the flange portion 22 so as to cover the opening 29 of the housing portion 25 of the container 20, it is joined by the seal portion 40 to the first plane 221 of the flange portion 22 there. In this embodiment, the contour of the lid 30 is the same as the contour of the flange portion 22 except the notched portion 39 to be described later, is formed in a substantially rectangular shape. The lower surface 32 of the lid 30 is configured to be joined to the first plane 221 of the flange portion 22.
[0194]
　As in the third embodiment, the melting point of the material constituting the sealant layer 35 is preferably 120 ° C. or higher, more preferably 130 ° C. or higher. Also, if further comprising a heat-softenable resin layer 37 which cover 30 will be described later, the melting point of the material constituting the sealant layer 35 is higher than the softening temperature of the resin constituting the heat-softened resin layer 37 is preferred. The melting point of the material constituting the sealant layer 35 is lower than the melting point of the resin constituting the base material 34.
[0195]
　[Seal Portion
　seal portion 40 seals the accommodating portion 25 of the container 20 by joining a lower surface 32 of the first plane 221 and the lid 30 of the flange portion 22 from the outside. As shown in FIG. 40A, the seal section 40 between the first plane 221 and the lower surface 32 of the lid 30 of the flange portion 22 is continuously formed over one circumference so as to surround the accommodating portion 25 in a plan view . Seal portion 40 may be one which is formed by at least partially melting at least one of the container 20 or lid 30. The sealing portion 40, such as an adhesive, the container 20 and lid 30 may be one formed by separate components. The seal portion 40 by forming between the lid 30 and the flange portion 22, it is possible to seal the housing portion 25 of the container 20 from the outside. In FIG. 40B, although the sealing portion 40 is shown an example which is formed on the lid 30 side, it is not limited thereto. For example, the seal portion 40, which may be across both the lid 30 and the flange portion 22, also, the sealing portion 40 may be formed in the flange portion 22 side.
[0196]
　As shown in FIG. 40A, the seal section 40, the primary seal portion extending along the inner edge 22x or outer edge 22y of the flange portion 22 (the main line) 42 are arranged in a long side portion 22A of the flange portion 22, the main seal portion has projecting sealing portion protruding inward and (projecting line) 44, from 42. Note that the long side portion, a portion extending along the longer side 22a of the flange portion 22. Further, a portion extending along the short side 22b of the flange portion 22, referred to as short side portions 22B.
[0197]
　Figure 41 is an enlarged view showing a protruding sealing portion 44 of the sealing portion 40 of the container with lid 10 shown in FIG. 40A. As shown in FIG. 41, the protruding sealing portion 44 of the sealing portion 40 includes a first portion 45 of the pair extending from the main seal portion 42 on the inner side, the tip portion connecting the pair of first portion 45 (second portion ) contains a 46. Therefore, the protruding sealing portion 44 will have a generally triangular shape which projects inwardly. In this case, the pressure in the housing portion 25 of the container 20 with the heat increases, the distal end portion of the substantially triangular protruding inwardly of the protruding sealing portion 44, i.e. distal portion 46 is peeled off, at the location of the distal end portion 46 the lid 30 is peeled from the first plane 221 of the flange portion 22.
[0198]
　Incidentally, as long as can be peeled from the flange portion 22 faster than the protruding sealing portion 44 the main seal portion 42 when the contents are heated, does not specific shape of the protruding sealing portion 44 is limited. For example, although not shown, the protruding sealing portion 44 may further include a portion other than the first portion 45 and the tip 46 described above.
[0199]
　[Venting mechanism]
　When the protruding sealing portion 44 is peeled from the flange portion 22, steam holes are formed between the lid 30 and the flange portion 22, the vapor of the housing portion 25 through the steam holes escapes to the outside. Accordingly, in this embodiment, the protruding sealing portion 44, constitute a venting mechanism 18 for discharging the steam generated in the housing portion 25 to the outside of the housing portion 25.
[0200]
　Venting mechanism 18 is preferably the distance from the center point 29c of the opening 29 is provided such that the shortest distance. For example, if the contour of the flange portion 22 is substantially rectangular, protruding sealing portion 44 of the flange portion 22 is preferably of the long side portion 22A of the flange portion 22, located in the middle in the direction long side 22a extends. Thus, the distance between the center point 29c of the opening 29 and the inner edge 40x of the protruding sealing portion 44 can be the shortest distance, by this, the projecting seal due to the pressure caused when the contents are heated it is possible to further increase the force acting on the part 44.
[0201]
　Incidentally, when the contents are heated in a microwave oven, the contents of the temperature of the vessel 20 is also increased with the flange portion 22 and the container 20 is deformed sometimes or crimped warp upward. Alternatively, when the rigidity of the container 20 is low, the flange portion 22 deforms the container 20 when joining the cover 30 to the container 20 may or crimped warp upward. When such deformation occurs, the formed steam holes becomes easy to be closed between the lid 30 and the flange portion 22. In consideration of such problems, in the present embodiment, it is proposed to form a notch 39 at the outer edge 30y of the lid 30. In the present embodiment, the cutout portion 39 of the lid 30 functions as suppressing adhesion suppression mechanism 19 that the lower surface of the upper surface and the lid 30 of the flange portion 22 comes into close contact when the contents are heated.
[0202]
　(Notch)
　will be described below notch 39 of the lid 30. Figure 39, as shown in FIGS. 40A and 41, the outer edge 30y of the lid 30 includes a main line 301 which extends along the inner edge 22x or outer edge 22y of the flange portion 22, inwardly from the main line 301 as a boundary the boundary point 303 having a protruding line 302 which is headed projects, the. Notch 39 described above is surrounded by a in a plan view, and an extension line La obtained by extending from the boundary point 303 along the direction in which the main line 301 extends a main line 301 virtually, a protruding line 302 parts it is. In this embodiment, notch 39 has a generally triangular shape.
[0203]
　As shown in FIG. 41, the notch portion 39 in plan view, is located inside the imaginary circle Lb indicated by a one-dot chain line. Circle Lb is centered on the center point 29c of the opening 29 (accommodation portion 25), and a circle passing through the boundary point 303 between the main line 301 of the outer edge 30y of the lid 30 and the projecting line 302.
[0204]
　As shown in FIGS. 40A and 41, preferably, notch 39 is formed in a portion overlapping the flange portion 22 while positioned outside the projected seal part 44 of the sealing portion 40 in a plan view of the lid 30 there. Specifically, notch 39, a lid when viewed along a direction perpendicular to the direction in which the extending (long side 22a in this case) the flange sides venting mechanism 18 (the protruding sealing portion 44) is formed 30 of the notch 39 and the venting mechanism 18 (the protruding sealing portion 44) and to overlap at least partially, is located.
[0205]
　Preferably, the protruding line 302 constituting the cutout portion 39 of the lid 30, other portions of the outer edge 30y of the lid 30 than (where the main line 301), the opening 29 (accommodating portion 25) of the container 20 in a plan view It is in close proximity to the center point 29c. For example, when drawn straight Lc to reach the shortest distance from the center point 29c of the opening 29 to seal portion 40 in a plan view, the straight line Lc intersects the projected lines 302 constituting the notch 39. In this embodiment, the straight line Lc, as well passes through the center point 29c of the opening 29 extends in a direction perpendicular to the direction in which one side of venting mechanism 18 of one side of the flange portion 22 is formed extending. Incidentally, preferably, the seal portion 40, so that the straight line Lc passes through the center point P2 of the protruding sealing portion 44 is configured.
[0206]
　In Figure 41, reference numeral D denotes a depth of the notch 39. The depth D of the notch 39, in a direction orthogonal to the extension line La, is defined as the maximum value of the distance between the extension line La and the projection line 302. The depth D of the notch 39 is, for example 3mm or more and 10mm or less.
[0207]
　Figure 42 is a cross-sectional view showing a case where a container with lid 10 shown in FIG. 41 taken along Lc line. According to this embodiment, by forming a notch 39 at the outer edge 30y of the lid 30, the flange portion 22, so that the portion does not overlap with the cover 30 exists. In Figure 42, reference numeral S1 is in a direction straight Lc connecting the center point 29c and the seal portion 40 of the opening 29 (accommodating portion 25) at the shortest distance extends, the dimensions of the portion overlapping the lid 30 of the flange portion 22 It represents, code S2 is representative of the size of the portion that does not overlap with the lid 30 of the flange portion 22. Preferably, the dimension S2 is at 4mm or more and 11mm or less. The ratio of the dimension S2 with respect to the dimensions S1, i.e. S2 / S1 is 1 or more and 4 or less.
[0208]
　Although not shown, the outer edge 30y of the lid 30 may have a plurality of cutout portions 39 are formed. Also, rather than that the shape of the notch 39 is not limited to triangular, semicircular, such as a rectangle may have various shapes are adopted.
[0209]
　(Method of manufacturing a container with a lid)
　Next, an example of a method for manufacturing a container with lid 10.
[0210]
　First, by an injection molding method using a thermoplastic resin such as polypropylene to produce a container 20 having a body portion 21 and the flange portion 22 integrally formed. Moreover, to prepare the cover 30 to notch 39 is formed on the outer edge 30y. Next, filling contents into the accommodating portion 25 of the container 20. Thereafter, it places the lid 30 on the upper surface of the flange portion 22 of the container 20. Next, the portion to the seal portion 40 is formed out of the lid 30, by heating from the upper surface 31 side by using a hot plate to melt the sealant layer 35 of the lid 30. Thereby, it is possible to form the seal portion 40 for fixing the lower surface 32 of the lid 30 to the first plane 221 of the flange portion 22 of the container 20. In this way, a container 20, a lid 30 joined to the first plane 221 of the flange portion 22 of the container 20 through the sealing portion 40, it is possible to obtain a container with lid 10 with a.
[0211]
　(Method of heating the contents)
　Next, an example of a method for heating the contents housed in the housing portion 25 of the container 20 of the container with lid 10 will be described with reference to FIGS. 43A through FIG. 43C. Both FIGS. 43A through FIG. 43C, the container with lid 10 when the heating of the contents is a sectional view showing a when viewed along a straight line Lc shown in FIG. 40A.
[0212]
　First, the bottom portion 211 is the container with lid 10 in a state of facing downward of the container 20 is placed inside the microwave oven. Next, the contents are heated using a microwave oven. Thus, the temperature of the contents is increased, along with this, moisture contained in the contents is increased the pressure in the housing portion 25 and evaporated. Therefore, As shown in FIG. 43A, the portion in contact with the housing portion 25 of the lower surface 32 of the lid 30 is pressed by the pressure P of the steam, the lid 30, the bulge 38 bulges upward is formed.
[0213]
　When the pressure in the accommodating portion 25 is further increased with the heating, bulges 38 of the lid 30 is further expanded, reaches the protruding sealing portion 44 of the sealing portion 40 as shown in FIG. 43A. In places where the projecting seal portion 44 are formed, the lid 30 is force pulled upward becomes larger than the bonding strength of the projecting seal part 44, the lid 30 is peeled from the flange portion 22.
[0214]
　When the lid 30 is peeled off from the flange portion 22, as shown in FIG. 43B, the steam escape between the first plane 221 of the lower surface 32 and the flange portion 22 of the lid 30, the vapor F of the housing portion 25 to the outside hole 251 is formed. Here, according to this embodiment, the cutout portion 39 is formed on the outer edge 30y of the cover 30 on the outside of the projecting seal portion 44. Therefore, even when the flange portion 22 as shown in FIG. 43C is deformed upward, it is possible to prevent the lid 30 to the flange portion 22 are in close contact, thereby, the steam holes 251 are closed it is possible to suppress that. Therefore, it is possible to cause leakage of steam F of the housing portion 25 through the steam holes 251 in a stable manner outside. This can reduce the pressure in the housing portion 25. Thus, while suppressing the like rupture of the lid 30 occurs, it is possible to heat the contents by using the microwave oven.
[0215]
　Note that it is possible to make various modifications to the embodiments described above. Hereinafter, a modified example will be described. In the drawings used in the following description and the following description, the parts that may be configured in the same manner as the embodiment described above will be referred to with the same reference numerals as those used for corresponding parts in the embodiment described above and redundant description will be omitted. Also, when the effects obtained in the embodiment described above it is clear that also obtained in the modification, it may be omitted from the description.
[0216]
　(First Modification)
　In the embodiment described above, the main line 301 of the outer edge 30y of the lid 30, an example which is located inside the outer edge 22y of the flange portion 22 of the container 20. However, it is not limited thereto, as shown in FIG. 44, the main line 301 of the outer edge 30y of the lid 30, may correspond to the outer edge 22y of the flange portion 22 of the container 20.
[0217]
　(Second Modification)
　In the embodiment described above, the notch 39 of the lid 30, an example having, for example a generally triangular shape having the same shape as the protruding sealing portion 44 of the sealing portion 40 . However, it is not limited thereto, as shown in FIG. 45, the notch portion 39 of the lid 30, may have a different shape than the protruding sealing portion 44 of the sealing portion 40. For example, in the case where the projecting seal portion 44 of the sealing portion 40 has a generally triangular shape, the notch portion 39 of the lid 30 may have a semi-elliptical shape.
[0218]
　Incidentally, in FIG. 45, as in the first modified example described above, an example in which the main line 301 of the outer edge 30y of the lid 30 matches the outer edge 22y of the flange portion 22 of the container 20, this limited will not be used. In this modification, the main line 301 of the outer edge 30y of the lid 30 may be located inside the outer edge 22y of the flange portion 22 of the container 20.
[0219]
　(Third Modification)
　In the embodiment described above, the flange portion 22 of the container 20 has a contour of substantially rectangular shape (substantially rectangular shape) including a pair of long sides 22a, and a pair of short sides 22b It shows an example. However, it is not limited thereto, as shown in FIG. 46, the flange portion 22 may have a substantially square contour including four equal side length. In this case, the projecting seal portion 44 of the sealing portion 40 may be formed in a portion of the corner portion 22c of the flange portion 22. For example, the protruding sealing portion 44 has: a first side one of the first portion 45 connected to the main seal portion 42 extending along the 22f of the flange portion 22, which is connected to the first side 22f of the flange portion 22 including the other first portion 45 of which is connected to the main seal portion 42 extending along the second side 22 g, a. Angle and one of the first portion 45 and the other first portion 45 of the forms is, for example, 90 °.
[0220]
　In this modification, the portion overlapping the flange portion 22 while positioned outside the projected seal part 44 of the sealing portion 40 in a plan view of the lid 30, the cutout portion 39 is formed. For example, also in this modification, when drawn straight Lc to reach the shortest distance from the center point 29c of the opening 29 in plan view to the seal portion 40, the straight line Lc is the projected line 302 constituting the cutout portion 39 intersect. By thus forming the notch 39 on the lid 30, also in this modification, it is possible to prevent the lid 30 is brought into close contact with the flange portion 22 of the deformed container 20, whereby, the steam holes 251 it can be prevented from being closed.
[0221]
　Incidentally, in FIG. 46, at three corners 22c other than the corner portion 22c of venting mechanism 18 is formed of the corner 22c of the flange portion 22, a corner portion 30c of the lid 30 is the corner portion 22c of the flange portion 22 an example located inside the, but not limited thereto. Although not shown, in the three corner portions 22c of the other corner portion 22c of venting mechanism 18 is formed of the corner 22c of the flange portion 22, a corner portion 22c of the position and the flange portion 22 of the corner portion 30c of the lid 30 and the position may not match.
[0222]
　(Fourth Modification)
　Next, with reference to FIGS. 47 to 49C, a description will be given of a fourth modified example. In the fourth modification, by providing a heat-softenable resin layer 37 on the lid 30 constitutes a venting mechanism 18. In the fourth modification, a detailed description is given the same reference numerals in the form of the same parts of the embodiment described above will be omitted. Also, when the effects obtained in the embodiment described above it is clear that also obtained in the present embodiment, it may be omitted from the description.
[0223]
　Figure 47 is a plan view showing a container with lid 10 according to the present modification. Further, FIG. 48 is a sectional view showing a when viewed along the container with lid 10 shown in Figure 47 the straight line Lc. In this modification, the straight line Lc is a straight line reaching at the shortest distance from the center point 29c of the opening 29 to seal portion 40 in a plan view.
[0224]
　As shown in FIG. 48, the lid 30 includes a substrate 34, in addition to the sealant layer 35 and the adhesive layer 36, further comprises a heat-softenable resin layer 37 located between the substrate 34 and the sealant layer 35. Heat-softenable resin layer 37, the adhesive layer 36 in contact with the substrate 34, is positioned between the sealant layer 35. Although not shown, heat-softenable resin layer 37, the adhesive layer 36 in contact with the sealant layer 35, may be positioned between the substrate 34. Furthermore, if the lid 30 comprises a support, between the substrate 34 and the support, or, a heat-softenable resin layer 37 may be positioned between the support and the sealant layer 35.
[0225]
　As shown in FIGS. 47 and 48, heat-softenable resin layer 37 spreads to reach the outer edge 40y of the main seal portion 42 from the inner edge 40x of the main seal portion 42 of at least the sealing portion 40. By thus providing a heat-softenable resin layer 37, facilitating the release of the main seal portion 42 by utilizing the gap 37a generated inside of the lid 30 by, as described later, heat-softenable resin layer 37 is softened can do. In this modification, a portion overlapping with out heat softenable resin layer 37 of the lid 30 constitute a venting mechanism 18.
[0226]
　In this modification, preferably, venting mechanism 18, the distance from the center point 29c of the opening 29 (accommodating portion 25) is provided such that the shortest distance. For example, if the contour of the flange portion 22 is substantially rectangular, heat-softenable resin layer 37, among the long side portion 22A of the flange portion 22 is provided so as to include an intermediate in a direction long side 22a extends.
[0227]
　In this modification, as shown in FIG. 47, the portion overlapping the flange portion 22 while positioned outside the heat-softened resin layer 37 (venting mechanism 18) in a plan view of the lid 30, the cutout portion 39 There has been formed.
[0228]
　Heat-softenable resin layer 37 has the following softening temperature 60 ° C. or higher 110 ° C., composed of a resin or resin composition. As the resin constituting the heat-softened resin layer 37, an ethylene - vinyl acetate copolymer, or a resin containing polyamide and nitrocellulose and the polyethylene wax may be mentioned. The resin containing polyamide and nitrocellulose and polyethylene wax, DIC Graphics Corp. of MWOP varnish (softening temperature: 105 ° C.), or the like can be used.
[0229]
　The thickness of the heat-softened resin layer 37 is preferably 1μm or more and 5μm or less. When the thickness of the heat-softenable resin layer is less than 1 [mu] m, when heating the container with lid 10 in a microwave oven, the gap 37a is less likely to occur between the substrate 34 and the sealant layer 35. Also, when the thickness of the heat-softened resin layer 37 exceeds 5 [mu] m, by the pattern of heat-softenable resin layer 37, when the wound laminated film for constituting the cover 30 into a roll, raised part occurs, it may occur a disadvantage that the film would extend that portion.
[0230]
　Preferably, the adhesive strength of the portion of which heat softenable resin layer 37 is provided in the lid 30 is in the first temperature region of 25 ° C. below are 700 (g / 15mm) or more, more than 80 ° C. The second temperature area In is 300 (g / 15mm) or less. Thus, inhibiting the handling at the time of room temperature or during freezing, transporting, by storage or the like, that delamination between or between the adhesive layer 36 and the sealant layer 35 of heat softenable resin layer 37 and the substrate 34 occurs be able to. Further, when heated in a microwave oven, the gap 37a is likely to occur between the substrate 34 and the sealant layer 35. Incidentally, the seal strength is the average value when measured by 180 ° peel at a tensile speed of 300 mm / min using a Tensilon tensile tester (manufactured by Orientec Ltd. RTC-1310A).
[0231]
　Heat-softenable resin layer 37 can be formed by using a coating method such as gravure printing method.
[0232]
　(Method of heating the contents)
　Next, an example of a method for heating the contents housed in the housing portion 25 of the container 20 of the container with lid 10 will be described with reference to FIGS. 49A through FIG. 49C. Both FIGS. 49A through FIG. 49C is a container with lid 10 when the heating of the contents is a sectional view showing a when viewed along a straight line Lc shown in FIG. 47.
[0233]
　When moisture contained in the contents is increased pressure in the housing portion 25 by evaporation, as shown in FIG. 49A, the portion in contact with the housing portion 25 of the lower surface 32 of the lid 30 is pressed by the pressure P of the steam, the lid 30 the bulge portion 38 bulging upward is formed. The lid 30 is heated, the temperature of each layer of the lid 30 is raised.
[0234]
　Here, in this modification, the lid 30 comprises a heat-softenable resin layer 37. Therefore, as shown in FIG. 49B, heat-softenable resin layer 37 is deformed and softened, as a result, heat-softenable resin layer 37 is cohesive failure, the gap 37a between the substrate 34 and the sealant layer 35 It occurs. As a result, in the portion where the heat softened resin layer 37 is provided tends elongation sealant layer 35, the lid 30 tends to inflate upward. Therefore, portions overlapping with out heat softenable resin layer 37 of the main seal portion 42 of the sealing portion 40, as compared with the other parts of the primary seal portion 42 of the sealing portion 40, a force to pull the lid 30 upwardly There join more strongly. Force to pull the lid 30 upwardly becomes larger than the bonding strength of the projecting seal portion 44, as shown in FIG. 49C, the lid 30 is steam hole 251 is peeled from the flange portion 22 is formed.
[0235]
　In this modification, by forming a notch 39 at the outer edge 30y of the lid 30 outside the heat-softenable resin layer 37, the lid 30 to the flange portion 22 of the deformed container 20 contact constituting the venting mechanism 18 it can be suppressed to. Thereby, it is possible to prevent the steam holes 251 are closed. Therefore, it is possible to cause leakage of steam F of the housing portion 25 through the steam holes 251 in a stable manner outside.
[0236]
　(Fifth Modification)
　Next, with reference to FIG. 50 through FIG. 52, a description will be given of a fifth modified example. In the embodiment and each modification example described above, an example of forming a notch 39 at the outer edge 30y of the lid 30. In the fifth modification, an example of further forming a notch 23 in the outer edge 22y of the flange portion 22. In the fifth modification, and a detailed description is given the same reference numerals in the form and modifications the same parts of the embodiment described above will be omitted. Also, when the effects obtained in form and each modification example described above it is clear that also obtained in this modification, it may be omitted from the description.
[0237]
　Figure 50 is an exploded view of members constituting a container with lid 10 according to the present modification, FIG. 51 is a plan view showing a container with lid 10. Further, FIG. 52 is a sectional view showing a when viewed along the container with lid 10 shown in Figure 51 the straight line Lc. In this modification, the straight line Lc is a straight line reaching at the shortest distance from the center point 29c of the opening 29 (accommodating portion 25) in plan view to the seal portion 40.
[0238]
　As shown in FIGS. 50 and 51, the outer edge 22y of the flange portion 22 of the container 20, the cutout portion 23 is formed. Specifically, the outer edge 22y of the flange portion 22 includes a main line 223 which extends along the inner edge 22x of the flange portion 22 in a plan view, a protruding line 224 that protrudes toward the main line 223 to the inside, the. Notch 23, as in the case of the notch 39 of the lid 30, in plan view, the extension lines obtained by extending the main line 223 virtually along a direction main line 223 extends, projecting line 224 It is defined as the area surrounded by the. In this modification, the cutout portion 23 has a generally triangular shape.
[0239]
　As shown in FIGS. 51 and 52, notch 23 is formed in a portion located outside the projected seal part 44 of the sealing portion 40 in a plan view of the flange portion 22. See Specifically, notch 23 (here the main line 223 of the long side 22a) venting mechanism 18 (the protruding sealing portion 44) of the flange is formed edges along a direction perpendicular to the extending direction is notch 23 and the venting mechanism 18 of the flange portion 22 and the (protruding sealing portion 44) to at least partially overlap, is disposed when the.
[0240]
　Preferably, the protruding line 224 constituting the cutout portion 23 of the flange portion 22, other portions of the outer edge 22y of the flange portion 22 than (the main line 223 in this case), the opening 29 of the container 20 in a plan view (containing portion It is in close proximity to the center point 29c of 25). For example, the straight line Lc to reach the shortest distance from the center point 29c of the opening 29 to seal portion 40 in plan view, it intersects the projecting line 224 constituting the notch 23.
[0241]
　In this modification, the cutout portion 23 of the flange portion 22 so as to be located outside the notch 39 of the lid 30 in plan view, is formed. In other words, the protruding line 224 of the outer edge 22y of the flange portion 22, as shown in FIGS. 51 and 52, is located outside the projected line 302 of the outer edge 30y of the lid 30. Further, notch 23, when venting mechanism 18 (the protruding sealing portion 44) of the flange is formed sides (here, the main line 223 of the long side 22a) viewed in the direction perpendicular to the extending direction is so that the notch 39 of the notch 23 and the lid 30 of the flange portion 22 is at least partially overlap, it is disposed. In Figure 51, the distance k between the outer edge 30y of the outer edge 22y and the lid 30 of the flange portion 22, over the entire area, i.e. in either of the main line 223 and the projection line 224 is illustrated example is constant .
[0242]
　A method of forming a notch 23 and the notch 39 of the lid 30 of the flange portion 22 is not particularly limited. For example, a step of forming a notch 23 in the flange portion 22, and forming a notch 39 on the lid 30, may be performed separately. Further, by punching the flange portion 22 and the lid 30 at a predetermined mold after bonding the lid 30 to the flange portion 22 of the container 20, it is formed with notch 39 of the notch 23 and the lid 30 of the flange portion 22 at the same time good. In this case, at least part of notch 23 and the notch 39, the interval k described above is zero.
[0243]
　In addition to forming a notch 39 on the lid 30, by further forming a notch 23 in the flange portion 22, according to this modification, the lid 30 is brought into close contact with the flange portion 22 of the deformed container 20 further can be suppressed, thereby, it is possible to prevent the steam holes 251 are closed.
[0244]
　Also in this modification, as in the fourth modification of the above, by providing a heat-softenable resin layer 37 on the lid 30, it may constitute a venting mechanism 18.
[0245]
　Further, the respective embodiments and their modifications described above may be appropriately combined with other embodiments and the modifications thereof.
DESCRIPTION OF SYMBOLS
[0246]
10 container with lid
18 venting mechanism
19 adhesion suppressing mechanism
20 container
21 body portion
211 bottom (bottom wall, the bottom
surface) 212 ridge (projecting
section) 213 side (the side wall, the side
surface) 214 first portion
215 second portion
22 flange part
22a long side
22b short side
22c corners
22A long sides
22B shorter side portion
22C corner portion
22x inner
22y edge
221 first plane
222 lower surface
23 notched portion
24 stepped portion
241 flange wall portion
242 second flat
25 accommodating section
251 steam hole
26 protrusion
29 opening
30 lid (lid
member) 30y outer edge
301 main line
302 protruding line
31 upper surface
32 lower surface
34 substrate
35 sealant layer
36 adhesive layer
37 heat-softenable resin layer
37a void
38 bulge
39 notch
40 seal portion (joint
portion) 42 main seal portion (main
line) 44 projecting seal portion (protruding
line) 44A first projecting seal portion
44B second protrusion seal portion
L1 flange portion of the longitudinal length
L2 of the short-side direction of the flange portion length
h1 vessel height
h1 lower edge of the lid and the second the distance between the upper edge of the plane

The scope of the claims
[Requested item 1]
A container having an opening formed, a container with a lid and a lid joined to the container covers the opening,
said container includes a bottom portion, and the erected sides from the bottom portion, said formed continuously on the upper side, and a flange portion including a first plane,
circumferential sealing portion is formed between the first plane of said lid and said flange portion,
　said sealing portion a primary seal portion, and a projecting seal portion protruding inward with respect to said principal sealing portion,
　to at least one of the flange portion or the lid, at least the corresponding projecting seal portion position, the protruding to the outside of the seal portion, the flange portion to suppress adhesion suppression mechanism adhesion of the lid is formed, capped container.
[Requested item 2]
　In the side, first portion corresponding to the protruding sealing portion, the first constitutes a partial flush or the same curved surface contiguous with the second portion located on either side of the lid according to claim 1 with container.
[Requested item 3]
　The adhesion suppressing mechanism includes a cutout portion formed in the flange portion at the outside of the projecting seal portion, the container with lid according to claim 1 or 2.
[Requested item 4]
　The outer edge of the projecting seal portion is in contact with the notch portion of the flange portion, the container with lid according to claim 3.
[Requested item 5]
　The adhesion suppressing mechanism includes a stepped portion formed in the flange portion at the outside of the projecting seal portion,
　the step portion includes at least a flange wall is connected to the first plane extending downwardly from said first plane including, the container with lid according to claim 1 or 2.
[Requested item 6]
　The outer edge of the projecting seal portion is in contact with the stepped portion of the flange portion, the container with lid according to claim 5.
[Requested item 7]
　The adhesion suppressing mechanism is formed on the outside of the projecting seal portion to said first plane of said flange portion includes a protrusion protruding from said first plane upward, the container with lid according to claim 1 or 2 .
[Requested item 8]
　The adhesion suppressing mechanism includes at least two of the convex portions are arranged with a gap,
　at least two of the convex portion, intersects the convex portion with passing through the center point and the gap of the opening in a plan view so that it is possible to draw a straight line extending to the outer edge of the flange portion without, are arranged, the container with lid according to claim 7.
[Requested item 9]
　The adhesion suppressing mechanism, the including a notch formed in the lid outside the protruding sealing portion, the container with lid according to any one of claims 1 to 8.
[Requested item 10]
　The portion connecting two intersections of the outer edge of the seal portion of the straight line extending so as to pass through the center point of the opening and the center point of the projected seal part referred to as a first segment, the first segment If the portion connecting two intersections of the outer edge of the seal portion of the straight line extending through the center point of the opening with orthogonal is referred to as a second segment, the first segment is the second segment shorter than, the container with lid according to any one of claims 1 to 9.
[Requested item 11]
　The protruding sealing portion, the container with lid according to any one of claims 1 to 10 are formed at two or more locations in a position facing the container.
[Requested item 12]
　Said first shortest distance in the plan view from the adhesion inhibiting mechanism to said opening, viewed from the inner edge of the connecting portion to which the a main sealing portion and the protruding sealing portion is connected among the sealing portion to the opening the second shorter than the shortest distance, the container with lid according to any one of claims 1 to 11 in.
[Requested item 13]
　A container having an opening formed,
　a bottom portion, and the erected sides from the bottom portion, are provided continuously on the top of the side portion includes a first plane lid is bonded, the opening and a flange portion defining,
　with the flange portion, the flange portion and the adhesion and adhesion suppression mechanism is formed suppressing the lid,
　the adhesion inhibition mechanism, notches formed on the outer edge of the flange portion parts, the step portion and a second plane that is provided continuously from the first plane is connected to the first plane to the flange portion and the flange wall portions extending downwardly, or a protrusion protruding from the first plane upward including, container.
[Requested item 14]
　In the side, first portion corresponding to the adhesion inhibition mechanism constitute the same plane or the same curved surface continuous with the second portion located on either side of the first portion A container according to claim 13 .
[Requested item 15]
　The adhesion suppressing mechanism is positioned on a straight line extending between the center point of the inner edge and the opening in the flange portion so as to connect the shortest distance A container according to claim 13 or 14.