DESCRIPTION
LIDDED CONTAINER
BACKGROUND OF THE INVENTION
5 Field of the Invention
[OOOll
The present invention relates to a lidded ontainer
including a container having an opening formed therein and a lid joined to the container by a closing seal portion so as to cover
10 the opening. More particularly, the present invention relates to a lidded container configured to be deformed by an external
force applied to a bottom surface or side surface of the container, thereby raise the pressure inside the container, and consequently partially separate the closing seal portion.Background Art
[Ooszg En the prior art, lidded containers which contain contents having fluidity such as a liquid or a powder in a plastic container 28 and are sealed with a lid formed from a film or the like are widely marketed. Particularly small ones of such lidded containers are also referred to as portions, potion containers,
potion cups, and the iike. Small lidded containers are used to contain various contents such as gum syrup, creamer, seasoning,
25 and concentrated beverage.
[O003]
As one form of a lidded container, for example, as
disclosed in Patent Literature 1, there has been known a lidded container of a type configured to be deformed by an external
30 force applied to a bottom surface or side surface of the container, thereby raise the pressure inside the container, and
consequently partially separate the closing seal portion.
According to such a lidded container, for example, the closing
seal portion is separated by pressing the side surface or the
35 bo"iom surface of the container with one hand, whereby the
contents can be taken out. Thus, the contents can be easily
taken out as compared with a lidded container of a type in
which the lid needs to be removed with one hand while the
container is held with the other hand. In addition, it is possible
to prevent the contents from sticking to the hand when
separating the closing seal portion. As disclosed in Patent
Literature 1, a lidded container containing a concentrated beverage is set in a device such as a dilution beverage production device, and the bottom surface and the side surface of the container are pressed using the device, whereby a
beverage of a desired concentration can be produced.
[0004]
In the lidded container disclosed in Patent Literature I, a portion of the annular closing seal portion for joining the lid to a
flange portion of the container serves as a projecting seal portion projecting radially inward of an opening of the container.
I n this case, when the pressure inside the container rises, the projecting seal portion separates prior to other portions of the
closing seal portion. Thus, a user can predict from which
position of the opening the contents are likely to be discharged.
Citation List
Patent Literature
[OOO5]
Patent Literature 1: 1P 2015-9051 A
SUMMARY OF THE INVENTION
[0006]
When the external force is applied to the side surface of
the container to deform the container and thus to raise the
pressure inside the container, it is considered that the force
tending to separate the closing seal portion is strongly
generated at an end of the closing seal portion in a dil-ection
orthogonal to the direction of the external force in the closing
seal portion. Thus, it is preferable that the projecting seal
portion be provided at one of the two ends where the force
tending to separate the closing seal portion is strongly
generated.
On the other hand, since the force tending to separate
the seal portion is also strongly generated at the other end of
the closing seal portion, that is, a portion of the closing seal
5 portion which faces the projecting seal portion, this portion may
separate prior to the projecting seal portion. As a result, there
is a possibility that the contents are discharged from the lidded
container in a position not intended by the user.
[0007]
10 It is an object of the present invention to provide a lidded
container which can effectively solve such a problem.
[0008]
The present invention provides a lidded container
including a container having a bottom surface, a side surface
15 standing upright from the bottom surface and defining an
opening, and a flange portion continuously connected to an
upper portion of the side surface so as to surround the opening,
a lid covering the opening of the container, and a closing seal
portion located between an upper surface of the flange portion
20 of the container and a lower surface of the lid and joining the lid
to the flange portion of the container, wherein the closing seal
portion includes a main seal portion having a first end and a
second end and a projecting seal portion having one end
connected to the first end of the main seal portion and the other
25 end connected to the second end of the main seal portion and
projecting toward the opening of the container, and a width of a
leading end portion which is a portion of the projecting seal
portion, which is closest to a center point of the opening of the
container, is smaller than a width of an opposing portion which
30 is a portion of the main seal portion, which intersects with a
center line passing through the leading end portion of the
projecting seal portion and the center point of the opening of
the container.
[0009]
35 In the lidded container according to the present invention,
a difference between the width of the leading end portion and
the width of the opposing portion may be not less than 2 mm.
[0010]
In the lidded container according to the present invention,
when a seal portion in a case where it is assumed that the main
5 seal portion is virtually extended from the first end to the
second end of the main seal portion based on a direction in
which the main seal portion extends in the first end and the
second end of the main seal portion is referred to as a virtual
seal portion, a distance between an inner edge of a portion of
10 the virtual seal portion which intersects with the center line and
an inner edge of the leading end portion of the projecting seal
portion may be smaller than a width of the opposing portion of
the main seal portion.
[QQll]
15 In the lidded container according to the present invention,
when a portion of the projecting seal portion in which a distance
between opposing outer edges of the projecting seal portion in a
direction orthogonal to the center line is 5 mm is referred to as
an intermediate portion, a distance between an inner edge of
20 the leading end portion of the projecting seal portion and the
intermediate portion of the projecting seal portion in a direction
in which the center line extends may be smaller than the width
of the opposing portion of the main seal portion.
[0012]
25 In the lidded container according to the present invention,
a cutout, a step portion, or a through hole is formed in the
flange portion of the container at a position outside the
projecting seal portion, and a distance between an inner edge of
the leading end portion of the projecting seal portion and the
30 cutout, the step portion, or the through hole of the container in
the direction in which the center line extends may be smaller
than the width of the opposing portion of the main seal portion.
The step portion may extend in a direction in which the center
line passing through the leading end portion of the projecting
35 seal portion and the center point of the opening of the container
extends. In a plan view, the projecting seal portion may be in
contact with the step portion.
[0013]
The lidded container according to the present invention
may further include a pair of regulating seal portions provided
5 so as to sandwich the center line, passing through the leading
end portion of the projecting seal portion and the center point of
the opening of the container, in a plan view and connected to a
portion of the closing seal portion.
[0014]
10 I n the lidded container according to the present invention,
the side surface of the container may have a thickness of not
less than 100 prn and not more than 500 pm.
[0015]
In the present invention, the closing seal portion joining
15 the lid to the flange portion of the container includes a main
seal portion having a first end and a second end and a
projecting seal portion having one end connected to the first
end of the main seal portion and the other end connected to the
second end of the main seal portion and projecting toward the
20 opening of the container. When a portion of the projecting seal
portion which is closest to the center point of the opening of the
container is defined as a leading end portion and a portion of
the main seal portion which intersects with the leading end
portion of the projecting seal portion and the center line passing
25 through the center point of the opening of the container is
defined as an opposing portion, the width of the leading end
portion is smaller than the width of the opposing portion. For
this reason, it is possible to suppress that the inside of the
container communicates with the outside in a portion other than
30 the projecting seal portion, whereby it is possible to suppress
that the contents are discharged from the lidded container at an
unintended position.
BRIEF DESCRIPTION OF THE DRAWINGS
35 [0016]
Fig. f is 2 plan view showing a lidded container of an
embodiment of the present invention
Fig. 2 is a cross-sectional view taken along a second
center line of the lidded container of Fig. 1.
Fig. 3 is a cross-sectional view taken along a first center
5 line of the lidded container of Fig. 1.
Fig. 4 is a R-ont view of the lidded container of Fig. 1 as
viewed along an arrow IV.
Fig. 5 is a side view of the lidded container of Fig. 1 as
viewed along an arrow V.
10 Fig. 6 is an enlarged plan view of a projecting seal
portion of a closing seal portion of the lidded container of Fig. 1.
Fig. 7 is an enlarged plan view of the lidded container
satisfying a first preferred condition.
Fig. 8 is an enlarged plan view of the lidded container
15 satisfying a second preferred condition.
Fig. 9 is an enlarged plan view of the lidded container
satisfying a third preferred condition.
Fig. 10 is a plan view showing a modification of the lidded
container satisfying a third preferred condition.
2 0 Fig. 11 is a cross-sectional view taken along a first center
line of the lidded container of Fig. 10.
Fig. 12 is a plan view showing a modification of the lidded
container satisfying the third preferred condition.
Fig. 13 is a cross-sectional view taken along a first center
25 line of the lidded container of Fig. 12.
Fig. 14 is a side view showing a modification of the lidded
conta'iner.
Fig. 15 is a plan view showing a modification of the lidded
container.
3 0 Fig. 16 is a plan view showing a modification of the lidded
container.
Fig. 17 is a plan view showing a modification of the lidded
container.
Fig. 18 is a plan view showing a modification of the lidded
35 container.
Fig. 19 is a plan view showing a modification of the lidded
container.
Fig. 20 is a plan view showing a modification of the lidded
container.
Fig. 21 is a plan view showing a modification of the lidded
container.
Fig. 22 is a pian view showing a modificatioll of the lidded
container.
Fig. 23 is a bottom plan view showing a modification of
the lidded container.
Fig. 24 is a side view showing a state in which the lidded
container shown in Fig. 23 is placed on a placement surface with
being inclined.
Fig. 25 is a view of the lidded container of Fig. 24 as
viewed along an arrow XXV.
Fig. 26 is a plan view showing a modification of the lidded
container.
Fig. 27 is a cross-sectional view taken along a first center
line of the lidded container of Fig. 26.
Fig. 28 is a view showing an example of a method of
taking out contents from the lidded container of Fig. 26.
Fig. 29 is a plan view showing a modification of the lidded
container.
DETAILED DESCRIPTION OF THE INVENTION
[0017]
An embodiment of the present invention will be described
below with reference to Figs. 1 to 6. The entirety of a lidded
container 10 in this embodiment will be first described with
reference to Figs. 1 to 3.
[OOlS]
(Lidded Container)
Fig. 1 is a plan view showing a lidded container 10. Figs.
2 and 3 are longitudinal cross-sectional views taken along a first
center line b l and a second center line L2 of the lidded
container 10 of Fig. 1. The lidded container 19 includes a
container 20 having an opening 21. formed therein, a lid PO
covering the opening 21 of the container 20, and a closing seal
portion 30 joining the lid 50 to the container 20. In Fig. 1,
constituent elements of the container 20 covered with the lid 50,
such as the opening 21 and a flange portion 26 to be described
5 later, are indicated by dotted lines. The first center line L1 is a
straight line passing through a center point C of the opening 21
of the container 20 in a plan view and a leading end portion 37
of the projecting seal portion 34 of the closing seal portion 30 to
be described later. The second center line L2 is a straight line
10 that is orthogonal to the first center line L1 and passes through
the center point C of the opening 21 of the container 20 in a
plan view. The center point C is the center of gravity of the
opening 21, and in the present embodiment, the center point C
is defined as the center point of a circle virtually drawn so as to
15 circumscribe an outer edge of the opening 21 in a plan view.
[0019]
(Container)
Next, the container 20 will be described. As shown in
Figs. 1 to 3, the container 20 has a bottom surface 22, a side
20 surface 24 which stands upright from the bottom surface 22 so
as to spread over one circumference along an outer edge of the
bottom surface 22, and a flange portion 26 which is
continuously connected to an upper portion of the side surface
24. The side surface 24 defines the opening 21 of the container
25 20 in a plan view. The flange portion 26 is continuously
connected to the upper portion of the side surface 24 so as to
surround the opening 21 and extends outward horizontally. The
lid 50 described above is joined to an upper surface 26a of the
flange portlon 26 of the container 20. In the present
30 specification, terms such as "side surface", "upper portion",
"upper surface", "lower surface", and 'horizontal direction"
indicate the positions and directions of the lidded container 10,
the container 20, the lid 50, and constituent elements thereof
based on a state in which the lidded container 10 and the
35 container 29 are placed such that the bottom surface 22 of the
container 20 is located below.
[0020]
Figs. 1 to 3 show an example in which the bottom surface
22 and the side surface 24 of the container 20 are configured
such that the opening 21 has a substantially circular contour in
5 a plan view. However, the shape of the container 20 is not
particularly limited as long as the desired contents can be
contained in the container 20. For example, the opening 21
may have a rectangular or polygonal contour in a plan view.
The contour of the bottom surface 22 and the contours of the
10 flange portion 26 and the lid 50 may or may not be similar to
each other.
[0021]
The content to be contained in the container 20 is not
particularly limited as long as it is one having fluidity such as a
15 liquid, a viscous body, or a powder. As a feature of the lidded
container 10 according to the present embodiment, the lid 50
can be partially peeled off from the flange portion 26 of the
container 20 by pressing the side surface 24 and the bottom
surface 22 of the container 20 with one hand. For this reason,
20 it is preferable to use a content contained in the container 20
having a small capacity enough to be pressed with one hand.
For example, a content such as gum syrup, creamer, seasoning,
or concentrated beverage is preferably contained in the
container 20. A gel-like content such as jelly may be contained
25 in the container 20. The container 20 having a small capacity
means that the dimension of the opening 21 in a plan view is
not more than 60 mm, more preferably not more than 20 mm.
[0022]
As shown in Fig. 1, the flange portion 26 may include a
30 projecting portion 26c projecting toward the center point C of
the opening 21 in a plan view. I n other words, the side surface
21 may include a recess recessed toward the center point C of
the opening 21. A projecting seal portion 34, to be described
later, of the closing seal portion 30 is at least partially located
35 on the projecting portion 26c.
[ooraa
As shown in Fig. 1, the flange portion 26 may further
include a projecting portion projecting toward the center point 6
of the opening 21 in a plan view in addition to the projecting
portion 266 in which the projecting seal portion 34 is located.
5 For example, as shown in Fig. 1, the flange portion 26 may
include a projecting portion 26d provided at a position facing
the projecting portion 26c with the center point C interposed
therebetween in the direction in which the first center line L l
extends.
10 [0024]
Hereinafter, the shape of the container 20 will be further
described with reference to Figs. 4 and 5 in addition to Figs. 1
to 3. Fig. 4 is a front view of the lidded container 10 of Fig. 1
as viewed along an arrow IV, and Fig. 5 is a side view of the
15 lidded container 10 of Fig. 1 as viewed along an arrow V.
[0025]
As shown in Figs. 4 and 5, the side surface 24 may be
provided with a pair of bulging portions 25 bulging outward.
The pair of bulging portions 25 is arranged so as to sandwich
20 the first center line L1 therebetween and to intersect with the
second center line L2. When the bulging portion 25 thus
configured is provided, a user can easily apply an external force
to the side surface 24 of the container 20.
[0026]
2 5 (Closing seal portion)
Next, the closing seal portion 30 will be described. As
shown in Fig. 1, the closing seal portion 30 is an annular seal
portion which extends continuously over one circumference so
as to surround the opening 21 of the container 20 in a plan view.
30 As shown in Figs. 2 and 3, the closing seal portion 30. is located
between the upper surface 26a of the flange portion 26 of the
container 20 and a lower surface 50b of the lid 50. The lower
surface 50b of the lid 56 is joined to tlle upper surface 26a of
the flange portion 26 of the container 20 by the closing seal
35 portion 30.
In this specification, the term "joining" is a concept
including both welding and bonding. The term "welding" means
that the closing seal portion 30 is configured by at least partially
melting at least one of the container 20 and the lid 50. The
term "adhesion" means that the closing seal portion 30 is
constituted of a separate constituent element from the container
20 and the lid 50, such as an adhesive. Although Figs. 2 and 3
show an example in which the closing seal portion 30 is formed
to straddle both the lid 50 and the flange portion 26, the
present invention is not limited to this example. For example,
the closing seal portion 30 may be formed only on the lid 50
side, or may be formed only on the flange portion 26 side. In
the plan views of Fig. 1 and Figs. 6 to 10, 12, 15, 16, etc. to be
described later, the closing seal portion 30 is hatched.
[0027]
As shown in Fig. 1, the closing seal portion 30 extending
annularly so as to surround the opening 21 includes a main seal
portion 31 and the projecting seal portion 34. The projecting
seal portion 34 is a seal portion projecting toward the opening
21 in the closing seal portion 30. In the present embodiment,
the projecting seal portion 34 is at least partially located on the
projecting portion 26c of the flange portion 26. The main seal
portion 31 is a seal portion of the closing seal portion 30 other
than the projecting seal portion 34, and is provided along the
opening 21 in the present embodiment.
[0028]
Each of the main seal portion 31 and the projecting seal
portion 34 has one end and the other end. One end (first end)
of the main seal portion 31 and one end of the projecting seal
portion 34 are connected to each other at a first maximum point
35a. The other end (second end) of the main seal portion 31
and the other end of the projecting seal portion 34 are
connected to each other at a second maximum point 36a to be
described later. In other words, the main seal portion 31 and
the projecting seal portion 34 are distinguished with the first
maximum point 35a and the second maximum point 36a as
boundaries. The definition of the first maximum point 35a and
the second maxlmum point 36a will be described later.
[0029j
The projecting seal portion 34 includes a first projecting
seal portion 35 and a second projecting seal portion 36
5 arranged so as to sandwich the leading end portion 37
therebetween. The leading end portion 37 is a portion of the
projecting seal portion 34, which is closest to the center point C
in a plan view of the opening 21 of the container 20.
[0030]
10 As shown in Fig. 1, particularly the leading end portion
37 of the projecting seal portion 34 is closer to the center point
C of the opening 21 than the main seal portion 31. I n this case,
when an external force is applied to the bottom surface 22 or
the side surface 24 of the container 20, for example, to raise
15 the pressure inside the container 20, particularly the leading
end portion 37 of the projecting seal portion 34 separates prior
to the main seal portion 31, so that the lid 50 is peeled from the
flange portion 26 at the position of the leading end portion 37.
[003 1 ]
20 In Fig. 1, reference numeral 32 denotes an opposing
portion of the main seal portion 31, which faces the leading end
portion 37 of the projecting seal portion 34. The opposing
portion 32 is defined as a portion of the main seal portion 31
which intersects with the first center line L1. I n the present
25 embod~ment, the opposing portion 32 is located on the
project~ng portion 26d facing the projecting portion 26c where
the lead~ng end portion 37 is located. Reference symbol W1
represents the width of the opposing portion 32. The width W I
of the opposing portion 32 IS the dimension of the opposing
30 portion 32 in the direction along the first center line LI. The
width W1 of the opposing portion 32 is, for example, not less
than 3 mrn and not n?ore than 20 mm.
[0032]
As shown in Fig. 1, a cutout 28 extendrng from an outer
35 edge 27 of the flange portion 26 toward the opening 21 may be
formed at a position outside the projecting seal portion 34 of
the outer edge 47 of the flange portion 26. The cutout 28 may
be formed so as to be at least partially tapered toward the
opening 21. Preferably, the cutout 28 intersects with the first
center line L1 in a plan view. More preferably, a portion of the
cutout 28, which is closest to the opening 21, intersects with
the first center line L l in a plan view.
[0033]
Next, the projecting seai portion 34 will be described in
detail with reference to Fig. 6. Fig. 6 is an enlarged plan view
of the projecting seai portion 34 of the closing seal portion of 30
the lidded container 10 of Fig. 1.
[0034]
First, the definition of the projecting seal portion 34 will
be described. In the present embodiment, the projecting seal
portion 34 refers to a portion indicating a change where when a
distance from the inner edge of the closing seal portion 30 to
the center point C of the opening 21 is measured clockwise at
each position of the closing seal portion 30, the distance
indicates a first maximum value and is then reduced to become
a minimum value, and then the distance increases to indicate a
second maximum value. In Fig. 6, among points on the inner
edge of the closing seai portion 30, the first maximum point
indicating the first maximum value, a minimum point indicating
the minimum value, and the second maximum point indicating
the second maximum value are denoted by reference numerals
35a, 37a, and 36a, respectively. The leading end portion 37 of
the projecting seal portion 34 is a portion including the
minimum point 37a of the closing seal portion 30. The first
projecting seal poeion 35 is a portion of the closing seal portion
35 which extends from the first maximum point 35a to the
leading end portion 37. On the other hand, the second
projecting seal portion 36 is a portion of the closing sea! portion
35 which extends from the second maximum point 363 to the
leading end portion 37. The inner edge of the closing seal
portion 30 means an edge of the closing seal portion 30, which
is located on the opening 21 side. On the other hand, the outer

the leading end portion 37 and the width WI of the opposing
portion 32 is not less than 2 mrn. W2/W1 which is the width WI
of the opposing portion 32 of the main seal portion 31 with
respect to the width W2 of the leading end portion 37 of the
projecting seal poruon 34 is not less than 0.02 and not more
than 0.4.
[0039]
(Materials for Container and Lid)
Hereinafter, an example of materials constituting the
container 20 and the lid 50 will be described.
[0040]
As the material constituting the container 20, it is
possible to use plastics such as polypropylene, poiystyrene, and
polyethylene terephthalate. The thickness of the side surface
24 of the container 20 formed of plastic is preferably set such
that the container 20 can be easily deformed when an external
force is applied. For example, the thickness of the side surface
24 of the container 20 is not less than 100 prn and not more
than 500 pm and more preferably not less than 100 pm and not
more than 300 p m I n particular, the thickness of the flange
portion 26 of the container 20 is set such that the flange portion
26 can be easily bent starting from the cutout 28 or a step
portion, a through hole, or the like to be described later. For
example, the thickness of the flange portion 26 of the container
20 is not less than 300 pm and not more than 700 pm.
The thickness of the flange portion 26 is usually larger
than the thickness of the side surface 24.
[0041]
A material constituting the lid 50 is selected such that the
lower surface 50b of the lid 50 can be joined to the upper
surface 26a of the flange portion 26 of the container 20. For
example, the lid 50 includes a base material layer and a sealant
layer constituting the lower surface POb of the lid 50. The
thickness of the lid 50 is, for example, not less than 20 yrn and
not more than 100 pm.
[004Z]
As a material constituting the base material layer, a
polyester type resin such as polyethylene terephthalate, a
polyamide type resin such as nylon, polypropylene, or the like
can be used. As a material constituting the sealant layer,
polypropylene, a mixed resin of polypropylene and polyethylene,
or the like can be used. A mixed resin of polypropylene and
polyethylene is a material having a relatively small joining force,
which is also called an easy peel sealant. When both the base
material layer and the sealant layer contain polypropylene,
biaxially oriented polypropylene is used in the base material
layer, and non-oriented polypropylene is used in the sealant
layer.
100431
(Method of Manufacturing Lidded Container)
Next, an example of a method of manufacturing the
lidded container 10 will be described.
[0044]
First, the container 20 having the bottom surface 22, the
slde surface 24 and the flange portion 26 integrally formed is
formed by an injection molding method. Then, the lid PO is
placed on the upper surface 26a of the flange portion 26 of the
container 20. Thereafter, a portion of the lid 50 where the
closing seal portion 30 is to be formed is heated from an upper
surface 50a side using a hot plate or the like to melt the sealant
layer of the lid 50. Thereby, it is possible to weld the lower
surface 50b of the lid 50 to the upper surface 26a of the flange
portion 26 of the container 20 with the closing seal portion 30
interposed therebetween. Thereafter, the flange portion 26 is
punched out to form the cutout 28. At this time, a cutout
corresponding to the cutout 28 of the container 20 is formed
also in the lid 50.
[0045]
As a method of producing the container 20, in addition to
the injection molding method described above, a known method
such as a sheet molding method can be used as appropriate.
Before the lid 50 is joined to the container 20, the cutout 28
may be formed in the flange portion 26. In this case, the lid 50
may cover the cutout 28 of the container 20.
100461
(Method of Opening Lidded Container)
5 Next, an example of a method of opening the lidded
container 10 will be described.
[0047]
First, a user applies an external force to the side surface
24 of the container 20 so as to sandwich the first center line bl.
10 For example, the pair of bulging portions 25 of the side surface
24 is pressed inward of the container 20. At this time, the user
may press the pair of bulging portions 25 with one hand or
press with both hands.
[0048]
15 As the container 20 deforms, the internal volume of the
container 20 decreases, which results in an increase in the
pressure inside the container 20. This creates a force tending
to peel the lid 50 from the flange portion 26 of the container 20,
that is, a force tending to separate the closing seal portion 30
20 between the lid 50 and the flange portion 26. The term
'separation" is a concept including the case where the closing
seal portion 30 is peeled from the flange portion 26, the case
where the closing seal portion 30 is peeled off from the lid 50,
and the case where the closing seal portion 30 is broken so as
25 to partially remain on both the flange portion 26 side and the lid
50 side.
[0049]
When the user applies the external force to the side
surface 24 of the container 20 so as to sandwich the first center
30 line L1, the force tending to separate the closing seal portion SO
is strongly generated particularly in a portion of the closing seal
portion 30 which intersects with the first center line L I . That is,
the force tending to separate the closing seal portion 30 is
strongly generated particularly at the opposing portion 32 of the
35 main seal portion 31 and the leading end portion 37 of the
projecting seal portion 34. Here, in the present embodiment, as
pressure inside the container 20 is lowered. Here, according to
the present embodiment, the difference between the width W2
of the leading end portion 37 and the width W1 of the opposing
portion 32 is not less than 8 mm. Thus, it is possible to
suppress that the opposing portion 32 completely separates
before separation of the closing seal portion 30 progresses from
the leading end portion 37 toward the outer edge 27 of the
flange portion 26 and the gap between the flange portion 26
and the lid 50 is sufficiently enlarged. Thus, it is possible to
suppress that the contents are discharged from the lidded
container at the position of the opposing portion 32.
[0051]
In order to suppress that the contents are discharged
from the lidded container at the position of the opposing portion
32, it is more preferable that the following conditions be
satisfied with respect to the closing seal portion 30.
[0052]
(First Preferred Condition)
Fig. 7 is a view for explaining a first preferred condition,
and is an enlarged plan view showing the projecting seal portion
34. In Fig. 7, a portion 40 sandwiched between two dotted lines
is a seal portion (hereinafter referred to as a virtual seal
portion) when it is assumed that the main seal portion 31 is
virtually extended from a first end 31a to a second end 31b of
the main seal portion 31 based on a direction in which the main
seal portion 31 extends in the first end 31a and the second end
31b of the main seal portion 31. Reference symbol W3
represents a distance between an inner edge of a portion of a
virtual seal portion 40, which intersects with the first center line
L1, and an inner edge of the leading end portion 37 of the
projecting seal portion 34.
[Of3531
As the first preferred condition, it is proposed to make
the distance W3 smaller than the width W1 of the opposing
portion 32 of the main seal portion 31. 4s a result, prior to
progression of separation of the main seal portIan 31 from the
described above, the width W2 of the leading end portion 37 is
smaller than the width W1 of the opposing portion 32. Thus, it
is possible to suppress that the opposing portion 32 separates
prior to the leading end portion 37. Accordingly, the leading
5 end portion 37 is separated prior to the other portions of the
closing seal portion 30, and it is possible to form a gap between
the flange portion 26 of the container 20 and the lid 50 at the
position of the leading end portion 37. This allows the contents
to be taken out from the lidded container at an intended
10 position, that is, at the position of the projecting seal portion 34.
When the contents are raw materials for beverages and
cooked goods such as gum syrup, creamer, seasoning, and
concentrated beverage, the contents are taken out, for example,
toward dishes and cooking utensils. I f the contents are those
15 that the user can directly eat, such as jelly, the contents may be
taken out toward the mouth of the user. For example, the user
applies a force to the side surface 24 of the container 20 in a
state in which a portion of the container 20 corresponding to the
leading end portion 37 of the projecting seal portion 34 is
20 brought close to the mouth. As a result, the user can take out
the contents toward the mouth at the intended position.
[0050]
Incidentally, when the lid 50 is likely to come into close
contact with the flange portion 26 of the container 20, even if
25 the leading end portion 37 of the projecting seal portion 34 is
separated, a gas filled in the container 20 may not be properly
discharged to the outside. In this case, since the pressure
inside the container 20 remains high, separation of the closing
seal portion 30 progresses From the leading end portion 37
30 toward the outer edge 27 of the flange portion 26. Also in the
opposing portion 32 facing the leading end portion 37,
separation of the opposing portion 32 may progress from the
inner edge of the opposing portion 32 toward the outer edge.
Thereafter, when the gap between the flange portion 26 and the
35 lid 50 is sufficiently enlarged, the inside of the container 20 can
communicate with the outside via the gap, whereby the
inner edge of the opposing portion 32 to the outer edge,
progression of separation of the projecting seal portion 34 from
the leading end portion 37 to the first maximum point 35a and
the second maximum point 36a is facilitated. This allows the
5 inside of the container 20 to be communicated with the outside
on the projecting seal portion 34 side before the opposing
portion 32 completely separates, whereby the pressure inside
the container 20 can be lowered. Accordingly, it is possible to
suppress that the opposing portion 32 completely separates to
10 discharge the contents from the lidded container at the position
of the opposing portion 32.
[0054]
(Second Preferred Condition)
Fig. 8 is a view for explaining a second preferred
15 condition, and is an enlarged plan view showing the projecting
seal portion 34. In Fig. 8, reference numeral 38 represents a
portion (hereinafter referred to as an intermediate portion) in
which a distance between opposing outer edges of the
projecting seal portion 34 in a direction orthogonal to the first
20 center line L l is S. The distance S is, for example, 5 mm.
Reference symbol W4 represents a distance between the inner
I edge of the leading end portion 37 of the projecting seal portion
34 and the intermediate portion 38 of the projecting seal
portion 34 in the direct~on in which the first center line L l
25 extends.
[0055]
As the second preferred condition, it is proposed to make
the distance W4 smaller than the width W l of the opposing
portion 32 of the main seal portion 31. As a result, prior to
30 progression of separation of the main seal portion 31 from the
inner edge of the opposing portion 32 to the outer edge, a width
of a gap formed between the lid 50 and the flange portion 26 by
separation of the projecting seal portion 34 on the projecting
seal portion 34 side can be made not less than the distance S
35 described above. Thus, a suitable setting of the distance S
allows the inside of the container 20 to be communicated with
the outside on the projecting seal portion 34 side before the
opposing portion 32 completely separates, whereby the
pressure inside the container 20 can be lowered. Accordingly, it
is possible to suppress that the opposing portion 32 completely
separates to discharge the contents from the lidded container at
the position of the opposing portion 32.
[SO561
(Third Preferred Condition)
Fig. 9 is a view for explaining a third preferred condition,
and is an enlarged plan view showing the projecting seal portion
34. In Fig. 9, reference symbol W5 represents a distance
between the inner edge of the leading end portion 37 of the
projecting seal portion 34 and the cutout 28 in the direction in
which the first center line L1 extends.
[OOSS]
As the third preferred condition, it is proposed to make
the distance W5 smaller than the width W1 of the opposing
portion 32 of the main seal portion 31. As a result, prior to
progression of separation of the main seal portion 31 from the
inner edge of the opposing portion 32 to the outer edge,
separation of the projecting seal portion 34 progresses to the
cutout 28, so that the inside of the container 20 can be easily
communicated with the outside via the cutout 28. Thus, it is
possible to lower the pressure inside the container 20 before the
opposing portion 32 completely separates. Accordingly, it is
possible to suppress that the opposing portion 32 completely
separates to discharge the contents from the lidded container at
the position of the opposing portion 32.
[OOSS]
As examples of elements provided in the flange portion
26 to make it easy to communicate the inside of the container
20 with the outside, besides the cutout 28 described above, a
step portion 28a and a through hole 28b can be mentioned.
Hereinafter, an example in which the step portion 28a is
provided in the flallge portion 26 and an example in which the
thl-ough hole 28b is provided in the flange portion 26 w ~ l l be
described respectively.
[0059]
Fig. 10 is an enlarged plan view of the lidded container
10 in which the step pol-tion 28a is provided in the flange
5 portion 26. Fig. I1 is a cross-sectional view taken along the
first center line b l of the lidded container 10 of Fig. 10. The
step portion 28a is a portion of the flange portion 26 which has
transitioned to a lower surface 26b side relative to the
surrounding portion. Similarly to the cutout 28, the step
10 portion 28a is provided at a position outside the projecting seal
portion 34 of the outer edge 27 of the flange portion 26.
Preferably, the step portion 28a is provided so as to intersect
with the first center line L1 in a plan view.
[0060]
15 I n the example shown in Figs. 10 and 11, reference
symbol W5 represents a distance between the inner edge of the
leading end portion 37 of the projecting seal portion 34 and the
step portion 28a in the direction in which the first center line L1
extends. Also in the present modification, by making the
20 distance W5 smaller than the width W1 of the opposing portion
32 of the main seal portion 31, before the opposing portion 32
completely separates, the inside of the container 20 can be
easily communicated with the outside via the step portion 28a.
Accordingly, it is possible to suppress that the opposing portion
25 32 completely separates to discharge the contents from the
lidded container at the position of the opposing portion 32.
[0061]
Fig. 12 is an enlarged plan view of the lidded container
I 0 in which the through hole 28b of the flange portion 26 is
30 provided in the flange portion 26. Fig. 13 is a cross-sectional
view taken along the first center line L1 of the lidded container
10 of Fig. 10. Similarly to the cutout 28, the through hole 28b
is provided at a position outside the projecting seal portion 34
of the outer edge 27 of the Fiange por"iisn 26. Preferably, the
35 through hole 28b is provided so as to intersect with the first
center line hf in a plan view.
[0062]
2n the example shown in Figs. 12 and 13, reference
symbol W5 represents a distance between the inner edge of the
leading end portion 37 of the projecting seal portion 34 and the
5 through hole 28b in the direction in which the first center line L1
extends. Also in the present modification, by making the
distance W5 smaller than the width VV1 of the opposing portion
32 of the main seal portion 31, before the opposing portion 32
completely separates, the inside of the container 20 can be
10 easily communicated with the outside via the through hole 28b.
Accordingly, it is possible to suppress that the opposing portion
32 completely separates to discharge the contents from the
lidded container at the position of the opposing portion 32.
COO631
15 The lidded container 10 may satisfy any of the first to
third preferred conditions described above, or may satisfy a
plurality of conditions at the same time.
[0064]
Modifications
20 To be noted, various modifications can be made to the
above embodiments. Hereinafter, modifications will be
described with reference to the drawings as necessary. I n the
below description and the drawings used in the below
description, a component that can be configured similarly to the
25 above embodiment is indicated by the same reference number
as that of the above embodiment, and overlapped description is
omitted. When it is obvious that the operations and effects
obtained in the above embodiments can also be obtained in the
modifications, its description may be omitted.
30 [0065]
(Modification of Bulging Portion)
Fig. 14 is a view for explaining a modification of the
bulging portion 25 of the container 20, and, as in the case of Fig.
5, Fig. 14 is a side view of the lidded container 10 as viewed
35 along the arrow V of Fig. 1. As shown in Fig. 14, the bulging
portion 25 may have on its surface a slip-preventing portion for
preventing the user" fingers or the like from slipping against
the bulging portion 25 when the user's fingers or the like are in
contact with the bulging portion 25. The slip-preventing portion
includes, for example, embossing applied to the surface of the
bulging portion 25. For example, as shown in Fig. 14, a
plurality of embossments 25a extending straight in the
horizontal direction may be provided. The embossed portion of
the bulging portion 25 is formed so as to project outward with
respect to a portion not subjected to embossing.
[0066]
(First Modification of Container)
Fig. 15 is a view for explaining a first modification of the
container 20, and is a plan view showing the lidded container 10.
As shown in Fig. 15, the flange portion 26 of the container 20
may include a tab 29 projecting more outward than the other
portions of the flange portion 26. The tab 29 is located outside
the projecting seal portion 34.
[0067]
Aiso in the present modification, by making the width W2
of the leading end portion 37 smaller than the width W1 of the
opposing portion 32, it is possible to suppress that the opposing
portion 32 separates prior to the leading end portion 37. This
allows the contents to be taken out from the lidded container at
a specific position. Also in the present modification, any one or
more of the first to third preferred conditions described above
may be satisfied.
[006S]
(Second Modif~cationo f Container)
Fig. 16 is a view for explaining a second modification of
the container 20, and is a plan view showing the lidded
container 10. As shown in Fig. 16, the flange portion 26 of the
container 20 may have a rectangular shape in a plan view. In
this case, the projecting seal portion 34 of the closing seal
portion 30 is provided inside a corner portion of the flange
portion 26. For example, the first center line L1 passing
through the center point C of the opening 21 of the container 20
and the leading end portion 37 of the projecting seal portion 34
intersects with the corner portion of the flange portion 26 of the
container 20. Also in the present modification, the main seal
portion 31 is provided along the opening 21.
5 COO693
Also in the present modification, by making the width W2
of the leading end portion 37 smaller than the width W1 of the
opposing portion 32, it is possible to suppress that the opposing
portion 32 separates prior to the leading end portion 37. This
10 allows the contents to be taken out from the lidded container at
a specific position. Also in the present modification, any one or
more of the first to third preferred conditions described above
may be satisfied.
[0070]
15 (Third Modification of Container)
As shown in Fig. 15, when the flange portion 26 includes
the tab 29, a distance from the leading end portion 37 to the
outer edge 27 of the flange portion 26 increases in the direction
in which the first center line L1 extends. Thus, the lid 50 tends
20 to come into close contact with the flange portion 26 at a
position outside the leading end portion 37, and as a result,
even if the leading end portion 37 is separated, it may be
unable to take out the contents.
[0071]
2 5 In consideration of such a problem, in the present
modification, as shown in Fig. 17, it is PI-oposed to provide the
step portion 28a in the tab 29 of the flange portion 26. As in
(he case of the example shown in Fig. 10, the step portion 28a
is a portion of the flange portion 26 which has transitioned to
30 the lower surface 26b side relative to the surrounding portion.
The step portion 283 preferably extends in the same direction
as the projecting direction of the tab 29.
For example, when the tab 29 projects in the direction in
which the first center line b l extends, the step portion 28a also
35 extends in the direction in which the first center line %I extends.
[0072]
In Fig. 17, reference symbol W6 represents a distance
between the leading end portion 37 and the step portion 28a in
the direction in which the first center line L1 extends. The
distance W6 is, for example, not more than 2 mm. When the
5 distance W6 is set to not more than 2 mm, it is possible to
suppress that the lid 50 comes into close contact with the flange
portion 26 in a region between the leading end portion 37 and
the outer edge 27 of the flange portion 26. Further, when the
tab 29 is provided with the step portion 28a, the contents can
18 be guided along the step portion 28a, whereby the contents can
be easily poured from a specific position, for example, from the
tip of the step portion 2%.
[OD731
(First Modification of Seal Portion)
15 In the example shown in Fig. 17, the distance between
the leading end portion 37 and the step portion 28a in the
direction in which the first center line L l extends is more than O
mm. However, the present invention is not limited to this
example, and as shown in Figs. 18 and 19, the distance
20 between the leading end portion 37 and the step portion 28a in
the direction in which the first center line L1 extends may be O
mm. In other words, the leading end portion 37 and the step
portion 28a may be in contact with each other in a plan view.
I n this case, as shown in Fig. 18, the inner edge of the leading
25 end portion 37 and the inner edge of the flange portion 26 may
not be in contact with each other, and as shown in Fig. 19, the
inner edge of the leading end portion 37 and the inner edge of
the flange portion 26 may be in contact with each other.
Although not shown, when the flange portion 26 not including
30 the tab 29 is provided with the step portion 28a, the leading
end portion 37 and the step portion 28a may be in contact with
each other in a plan view.
[0074]
(Second Modification of Seal Portion)
35 As shown in Fig. 20, the seal portion joining the lid 50 to
the container 20 may further include a pair of regulating seal
portions 39 in addition to the closing seal portion 30 described
above. The pair of regulating seal portions 39 is a seal portion
which is provided so as to sandwich the first center line L1 in a
plan view and is connected to a portion of the closing seal
5 portion 30. I n the example shown in Fig. 20, the pair of
regulating seal portions 39 extends along the step portion 28a
so as to sandwich the step portion 28a in a plan view. One ends
of the pair of regulating seal portions 39 are respectively
connected to the first projecting seal portion 35 and the second
10 projecting seal portion 36. The other ends of the pair of
regulating seal portions 39 reach the outer edge 27 of the
flange portion 26. When the regulating seal portion 39 thus
configured is provided, the pouring direction and the pouring
position of the contents are easily determined. For example,
15 even when the contents overflow from the step portion 28a
when flowing toward the outer edge 27 of the flange portion 26,
it is possible to suppress that the contents are poured out from
an unintended position of the outer edge 27 of the flange
portion 26.
20 [0075]
(Third Modification of Seal Portion)
In the example shown in Fig. 20, although the pair of
regulating seal portions 39 extends along the step portion 28a,
the present invention is not limited to this example. For
25 example, as shown in Fig. 21, the pair of regulating seal
portions 39 may extend along the outer edge 27 of the flange
portion 26. I n the example shown in Fig. 21, each of the pair of
regulating seal portions 39 is connected to the main seal portion
31. Each of the pair of regulating seal portions 39 extends from
30 the main seal portion 31 toward the step portion 28a along the
outer edge 27 of the flange portion 26.
[0076]
The regulating seal portion 39 shown in Figs. 20 and 21
can also be provided in the lidded container 10 described in the
35 above embodiment and each modification.
[0077]
(Fourth Modification of Seal Portion)
Figs. 20 and 21 show an example in which there is a
region where the lid 50 and the upper surface 26a of the flange
portion 26 are not joined at least partially between the
5 regulating seal portion 39 and the step portion 28a in a plan
view. However, the present invention is not limited to this
example, and as shown in Fig. 22, the regulating seal portion 39
may be in contact with the step portion 28a over the entire
region in a plan view.
LO [0078]
Further, as shown in Fig. 22, the lid 50 and the upper
surface 26a of the flange portion 26 may be joined not only
between the regulating seal portion 39 and the step portion 28a
but also in all other regions except for the step portion 28a. Pn
15 this case, it is possible to use a fiat hot plate in the process of
welding the lid 50 to the upper surface 26a of the flange portion
26. I n other words, it is unnecessary to prepare a hot plate
having a protrusion corresponding to a pattern of a seal portion.
I n addition, the accuracy required for aligning the hot plate with
20 respect to the container 20 and the lid 50 is reduced.
Consequently, it is possible to reduce the cost and time required
for the process of welding the lid 50 to the upper surface 26a of
the flange portion 26.
[0079]
2 5 (Fourth Modification of Container)
Fig. 23 is a bottom view showing the lidded container I 0
according to the present modification. As shown in Fig. 23, a
recess 24a recessed toward the center point C of the opening 21
is formed in a portion of the side surface 24 of the container 20
30 on the side opposite to a portion which faces the step portion
28a. A recess 24b recessed toward the center point 6 of the
opening 21 may be formed in the portion of the side surface 24
of the container 20 which faces the step portion 28a. Both the
recess 24a and the recess 24b extend vertically so as to reach
35 the bottom surface 22.
[OOSO]
The advantage of providing the recess 24a on the side
surface 24 will be described with reference to Figs. 24 and 25.
Fig. 24 is a side view of the lidded container 10 inclined so that
the recess 24.3 is located downward. Fig. 25 is a view of the
5 lidded container 10 of Fig. 24 as viewed along an arrow XXV.
[ o o e i l
When the recess 24b is provided in the side surface 24,
paired protrusions 24c projecting more outward than the recess
24b are formed on both sides of the recess 24b. In this case,
10 when the lidded container 10 is inclined so that the recess 24a
is located downward, and placed on a predetermined placement
surface P, as shown in Figs. 24 and 25, the pair of protrusions
24c and the outer edge 27 of the flange portion 26 can be in
contact with the placement surface P. That is, the lidded
15 container 10 can be supported at at least three places. Thus, it
is possible to stably maintain the state in which the lidded
container 10 is inclined so that the recess 24a is located
downward. Accordingly, for example, as shown in Fig. 24, after
the lidded container 16 is opened, while contents 15 remain,
20 when the lidded container 10 is inclined so that the tab 29 faces
upward, and placed on the placement surface P, it is possible to
suppress that the contents 15 leak out of the lidded container
10.
[0082]
25 (Fifth Modification of Container)
Fig. 26 is a plan view showing the lidded container 10
according to the present modification. Fig. 27 is a crosssectional
view taken along the first center line L1 of the lidded
container of Fig. 26. In the example shown in Fig. 26, the
30 flange portion 26 formed with the projecting seal portion 34 is
not provided with the tab 29 but provided with the step portion
28a. The step portion 28a extends along the first center line b l
so as to be in contact with the lead~ng end portion 37 in a plan
view. Further, in the example shown in Fig. 26, the fIange
35 portion 26 formed with the opposing portion 32 is not provided
with the projecting portion 26d.
[0083]
In the present modification, as a method of using the
lidded container 10, it is assumed that the user applies a force
to the bottom surface 22 of the container 20 to separate the
5 leading end portion 37 of the projecting seal portion 34. For
example, as shown in Fig. 27, a recess 22b is formed on the
bottom surface 22 of the container 20 so that a user can easily
apply a force to the bottom surface 22 with a finger. The shape
and size of the recess 22b are set such that a user can easily
10 apply a force to the bottom surface 22 with a finger. For
example, a maximum value of a depth k1 of the recess 22b is
within the range of not less than 1 mm and not more than 10
mm, and a maximum value of a width k2 of the recess 22b is
within the range of not less than 10 mm and not more than 20
15 mm.
[0084]
Fig. 28 is a view showing an example of a method of
taking out the contents 15 from the lidded container 10 of the
present modification. As shown in Fig. 28, first, a user places a
20 thumb 61 on the recess 22b of the bottom surface 22 of the
lidded container 10 and places an index finger 62 on the lid 50
of the lidded container 10. Subsequently, the user presses the
lidded container 10 inwardly with the thumb 61 and the index
finger 62, as indicated by arrows F1 and F2 in Fig. 28. As a
25 result, the pressure inside the container 20 rises. This creates
the force tending to peel the lid 50 from the flange portion 26 of
the container 20.
[0085]
Here, also in the present modification, as in the case of
30 the above embodiment, the width WP of the leading end portion
37 is smaller than the widtl? W1 of the opposing portion 32.
Thus, it is possible to suppress that the opposing portion 32
separates prior to the leading end portion 37. Accordingly, the
leading end portion 37 is separated prior to the other portions
35 of the ciosing seal portion 30, and it is possible to form a gap
between the flange portion 26 of the container 20 and the lid 50
at the position of the leading end portion 37. This allows the
contents to be taken out from the lidded container at an
intended position, that is, at the position of the projecting seal
portion 34.
5 100861
Although not shown, the recess 22b shown in Fig. 27 may
be formed in the bottom surface 22 of the container 20
described in the above embodiment or each modification.
[0087]
10 (Sixth Modification of Container)
Fig. 29 is a plan view showing the lidded container 10
according to the present modification. Also in the lidded
container 10 shown in Fig. 29, as in the case of the lidded
container 10 shown in Fig. 27, the recess 22b is formed in the
15 bottom surface 22 of the container 20.
[0088]
As shown in Fig. 28, when the pressure inside the
container 20 is raised with the lid 50 pressed by a finger or the
like, it is considered that the pressure acts equally on each
20 portion of the closing seal portion 30 irrespective of the position.
I n this case, as shown in Fig. 29, the closing seal portion 30
may not have the projecting seal portion 34.
[0089]
Also in the example shown in Fig. 29, the closing seal
25 portion 30 includes a narrow-width portion 37A having a width
smaller than the other portions. The narrow-width portion 37A
has a width W2 smaller than the width W I of the opposing
portion 32 facing the narrow-width portion 37A with the center
point C interposed therebetween. Thus, when the pressure
30 inside the container 20 rises to peel off the closing seal portion
30, the inside of the container 20 communicates with the
outside at the position of the narrow-width portion 37A at the
earliest. Consequently, it is possible to suppress that the
contents are discharged from the lidded co~stainer at an
35 unintended position.
[ooso]
Preferably, as shown in Fig. 29, the step portion 28a, a
cutout (not shown) and the like are provided outside the
narrow-width portion 378 of the flange portion 26. As a result,
the contents can be guided along the step portion 28a, and
5 therefore, the contents can be easily poured from a specific
position, for example, from the tip of the step portion 28a.
[0091]
To be noted, the modifications described hereinabove
may also be made in an appropriate combination to the above
10 embodiments.

CLAIMS
I. A lidded container comprising:
a container having a bottom surface, a side surface
standing upright from the bottom surface and defining an
opening, and a flange portion continuously connected to an
upper portion of the side surface so as to surround the opening;
a lid covering the opening of the container; and
a closing seal portion located between an upper surface
o f the flange portion of the container and a lower surface of the
lid and joining the lid to the flange portion of the container,
wherein the closing seal portion comprises a main seal
portion having a first end and a second end and a projecting
seal portion having one end connected to the first end of the
main seal portion and the other end connected to the second
end of the main seal portion and projecting toward the opening
of the container, and
a width of a leading end portion which is a portion of the
projecting seal portion, which is closest to a center point of the
opening of the container, is smaller than a width of an opposing
portion which is a portion of the main seal portion, which
intersects with a center line passing through the leading end
portion of the projecting seal portion and the center point of the
opening of the container.
2. The lidded container according to claim 1, wherein a
difference between the width of the leading end portion and the
width of the opposing portion is not less than 2 mm.
3. The lidded container according to claim 1 or 2, wherein
when a seal portion in a case where it is assumed that the main
seal portion is virtually extended from the first end t o the
second end of the main seal portion based on a direction in
which the main seal portion extends in the first end and the
second end of the main seal portion is referred to as a virtuai
seal portion, a distance between an inner edge of a portion of
the virtual seal portion which intersects with the center line and
an inner edge of the leading end portion of the projecting seal
portion is smaller than a width of the opposing portion of the
main seal portion.
4. The lidded container according to any one of claims 1 to
3, wherein when a portion of the projecting seal portion in
which a distance between opposing outer edges of the
projecting seal portion in a direction orthogonal to the center
line is 5 mm is referred to as an intermediate portion, a
distance between an inner edge of the leading end portion of
the projecting seal portion and the intermediate portion of the
projecting seal portion in a direction in which the center line
extends is smaller than the width of the opposing portion of the
main seal portion.
5. The lidded container according to any one of claims I to
4, wherein when a cutout, a step portion, or a through hole is
formed in the flange portion of the container at a position
outside the projecting seal portion, and
a distance between an inner edge of the leading end
portion of the projecting seal portion and the cutout, the step
portion, or the through hole of the container in the direction in
which the center line extends is smaller than the width of the
opposing portion of the main seal portion.
6. The lidded container according to claim 5, wherein the
step portion is formed in the flange portion of the container at
the position outside the projecting seal portion, and
the step portion extends in a direction in which the center
line passing "irough the leading end portion of the projecting
seal portion and the center point of the opening of the container
extends.
7. The lidded container according to claim 6, wherein in a
plan view, the projecting seal portion is in col-itact with the step
portion.
8. The lidded container according to any one of claims I. to
7, further comprising a pair of regulating seal portions provided
so as to sandwich the center line, passing through the leading
end portion of the projecting seal portion and the center point of
the opening of the container, in a plan view and connected to a
portion of the closing seal portion.
9. The lidded container according to any one of claims 1 to
8, wherein the side surface of the container has a thickness of
not less than 100 pm and not more than 500 ym.