Claims:1. A food preserve thermal insulated box comprising of:
a) a double walled vacuum insulated hollow container shell with a body having a closed bottom and an open top side,
b) a metallic foil disposed between the inner shell and the outer shell,
c) a getter material disposed between the outer shell and the inner shell and affixed onto one of the two shells,
d) a detachable hermitically sealed container lid adapted to co-operatively couple with the container the said lid having a top lid portion, a bottom lid portion, an insulation portion disposed between the said two portions of the lid and a venting aperture orifice,
e) a flat lid seal arranged on the bottom portion of container lid along the perimeter.
f) a bottom lid seal arranged on the bottom portion of container lid along the perimeter,
g) a deformable pressure venting plug means arranged on the bottom lid portion of container lid and between the flat lid seal and the bottom lid seal and extending into the container body,
h) a pressure release deformable and removable cap-like leak plug means disposed on the top lid portion of the container lid around the aperture ventilating orifice, and
i) a diametric grip bar arranged top surface of the top lid portion of the container lid.

2. The food preserve thermal insulated box as claimed in claim 1, wherein the outer shell has an alternating fluted configured surface.

3. The food preserve thermal insulated box as claimed in claim 1, wherein the inner shell is configured to have visible level marks on its inner surface.

4. The food preserve thermal insulated box as claimed in claim 1, wherein the container lid is configured to screw onto the container.

5. The food preserve thermal insulated box as claimed in claim 1, wherein the deformable pressure venting plug means is made of a flexible polymer such as a silicone or thermoplastic elastomer.

6. The food preserve thermal insulated box as claimed in claim 1, wherein the bottom side of the container is configured to complement the top lid portion of the container lid for vertical stacking engagingly.
, Description:Field of invention:

The invention is relating to the project which aims to design a vacuum insulated food storage container.

Prior art:

There are many vacuum insulated food preservation and storage boxes and each have a specific advantages and purposes limit suffer certain disadvantages.

Some of the patents identified are given below:

US6164442A - The invention is a multi-part, multi-fold, multi-compartment portable carrying and storage case comprising lower case section, case cover, shell member, and shell cover. The compartments in the storage case can also be double insulated for maintaining foods in a fresh state.

US 20180237207 - A nested insulated packaging assembly includes: an outer box including an outer top side wall, an outer bottom side wall, and a plurality of outer lateral side walls; an inner box received in the outer box, the inner box including an inner top side wall, an inner bottom side wall, and a plurality of inner lateral side walls; a first thermal liner contacting a one of the outer lateral side walls of the outer box and a one of the inner lateral side walls of the inner box; and a second thermal liner contacting a second of the outer lateral side walls of the outer box and a second of the inner lateral side walls of the inner box.

US4756446A - This invention relates to containers, particularly for food products, effective to keep the contents of the container warm or cool.

A double-walled container formed of synthetic resinous material, including generally hemispherically-shaped outer and inner walls nested together with a gap between the walls, a flange extending from the outer periphery of the inner wall to the top edge of the outer wall, the flange and outer wall being permanently joined together so as to form the two walls into a unitary structure.

WO2012016344A3 - The invention specifies a double-walled liquid container having an inner side wall (4), an outer side wall (3), which is arranged outside the inner side wall (4), a retaining structure (1) and a fixing element (6), which is fitted on the retaining structure (1).

US20100187296A1 - A container according to a preferred embodiment of the present invention provides an inner wall and an outer wall wrapped there around so as to define a double-wall container construction. A plurality of spacer elements are interposed between the inner and the outer walls so as to maintain a minimum thickness of an air space defined there between.

WO2010019146A1 - The invention is directed to a multi-wall container, including a first inner sidewall having a first face and a second face, wherein the first face is polycoated, at least a second outer sidewall having a first face and a second face, wherein the second face of the second sidewall is polycoated. The container provides enhanced use for both hot and cold products, using the minimal amount of materials so as to be cost-effective.

US7458504B2 - A multi walled container for storing ingestibles the container comprising a paperboard sidewall, a bottom wall, a paperboard sleeve member.

WO2013064880A1 - Food grade container with a double wall structure that provides the benefits of insulating the contents from the environment and also serving to enhance the structural rigidity of the item in use. Multiple cavities are formed between the two walls designed to contain an insulating air barrier.

US4151032A - A container of the kind comprising mating inner and outer wall parts of plastics material with a pre-printed paper insert (3) interposed there between. A rounded container for sealing-in a hot filled or a dry food product to which hot or boiling water is added for eating

Some of the Products available in the market:
• Ozeri FS3-R Thermomax Stackable Lunch Box and Double-wall Insulated Food Storage Container
• Vodool 3 Grid Stainless Steel Insulation Food Container double heat insulation, so that the food is perfect fresh-keeping.
• The stainless steel double walled bento box by Mannice is a handy lunch box to transport food to school or the office.
• BlinkOne Food Jar with Folding Spoon: Double Walled Insulated, Unbreakable, Leak Proof and Shake Resistant Container Flask (16 oz).

None of them exhibit simplicity or reassured insulation in terms of container and lid combinedly.

Suffering of prior art:

The problem with existing designs of vacuum insulated containers are that the users cannot carry hot and cold foods together.

Current designs incorporate a vacuum insulated metallic shell which covers a container in which the food is being carried. In this configuration having multiple containers, only hot or cold foods can be carried and not both of them together in the same container.

Existing designs provide a wide mouthed plastic lid, this large projected area will reduce the temperature retention performance of the food stored inside the metallic shell. Also, due to change in temperature, the pressure inside the shell changes with respect to the outs ide ambient pressure leading to locking of the said plastic lid, making them difficult to unscrew for usage.

Also, carrying multiple containers will lead to usage of large horizontal space, carrying them vertically would require some restraints to keep them together from falling away. These issues have been addressed in the current invention

Object of the invention:

- The first object is to create an insulated food storage box, which eliminates use of covering shell for insulation.
- The second object is to create an insulated food storage box, which is simple in construction.
- The third object is to create an insulated food storage box, which is low in manufacturing cost.
- The fourth object is to create an insulated food storage box, which is to create which can perform efficiently with minimum wear and tear.
- The fifth object is to create an insulated food storage box, which includes an insulated lid.

Description of Drawings:

Figure 1A illustrates the inner shell of the container
Figure 1B illustrates the outer shell of the container
Figure 1C illustrates the Metallic Foil
Figure 1D illustrates the Getter Material
Figure 2A illustrates the Lid top
Figure 2B illustrates the Insulation Material
Figure 2C illustrates the Lid bottom
Figure 2D illustrates the Arrangement of container lid

Figure 3A illustrates the Metal container
Figure 3B illustrates the Bottom plastic
Figure 3C Arrangement of metal container with bottom plastic
Part number Part name
31 Metal container
32 Bottom plastic
33 Bottom view of the bottom plastic

Figure 4A illustrates the lid parts
Figure 4B illustrates the Container lid
Part number Part name
41 Top plug
42 Flat seal
43 Pressure vent plug
44 Bottom seal

Figure 5A illustrates the Vacuum insulated individual containers
Figure 5B illustrates the Dual wall construction with welding at the neck
Figure 5C illustrates the Getter material and Aluminum foil with vacuum insulation
Figure 6d illustrates the Altering Fluting Design on the container
Figure 6e illustrates the Internal Water fill and seal support
Figure 7 illustrates the Hermetically sealed insulation in id cavity
Part number Part name
71 Ultrasonic welding of plastic

Figure 8 illustrates the Screw profile on Metal and Plastic
Part number Part name
81 Screws profile on metal and plastic
Figure 9 illustrates the Insulation
Figure 10 illustrates the Seals on the lid
Part number Part name
101 Flat seal
102 Bottom seal

Figure 11 illustrates the pressure vent plugs
Part number Part name
111 Leak plug
112 Pressure vent plug

Figure 12 illustrates the Diametrical bar design and square patterns
Figure 13 illustrates the Interlocking Feature in Bottom plastic lid

Description of invention:

In the current invention, Figure 1 illustrates insulated metallic container comprising of a stand-alone, double walled vacuum insulated container is designed for carrying foods. Insulation is provided by the metallic shell by itself and not by a shell which is placed or covered on it.

The major components of the insulated box:
1. Metal Parts
a) Metal Containers
i) lnnershell
ii) Outershell
iii) Metallic Foil
iv) Getter Material
2. Plastic Lids
i) Lid- Top
ii) Insulation Material
iii) Lid- Bottom
3. Plastic Bottom
i) Bottom Plastic Part
4. Seals
i) Top Plug
ii) Flat Seal
iii) Pressure Vent Plug
iv) Bottom Seal

Two metallic shell are welded at their necks to make a dual walled container, the so welded shells are then placed in a vacuuming machine to remove the air between the wall of the shells and is sealed by a glass sealant at high temperature.

Addition to this, a metallic foil such as Aluminum or Copper is placed in-between the inner and outer shells which decreases the radiative heat loss to the lower temperature side. A temperature activated getter material is also welded on to one side of the metal shell, which absorbs any remaining air after the vacuuming process.

To reduce the weight and increase the structural stability, the outer shell is made with alternating fluting type design. This type of design requires lesser thickness of material for supporting same amount of mechanical forces.

The design also acts as an aesthetic element and provides user a unique grip feel while using the product.

The inner shell is designed to provide the user the visual cues to prevent them from over filling, this feature also serves as the mechanical support for the sealing mechanism.

Insulated Lid

The current invention Figure 2 deals with a plastic lid which covers the metallic vacuum insulated container which can maintain hot or cold temperature of the contents for pro longed periods of time.

This is accomplished by introducing a hermetically sealed insulation in a lid cavity made out of plastic.

This lid is tightened by a screw action on to the metallic portion of the container.

The said hermetically sealed insulation provides thermal resistance to the flow of temperature to the ambient surrounding which leads prolonged thermal performance of the product.

The insulation materials in various embodiments are not limited to Expanded or Extruded Polystyrene, Cork, Wood or a Void of air etc.

Along with the threaded lid, two (2) seal made up of flexible polymer such as silicone or Thermoplastic Elastomer is used to provide a sealing feature which provides addition resistance to heat loss and fluid leakage due to variation in dimensions which may arise at the metal and plastic interface.

Addition to this, a pressure venting plug is provided in the bottom of the lid, which is exposed to hot or cold foods. This plug is designed so as to deform and equalize the variation of pressure internal to the metal shell and ambient environment. This seal made up of flexible polymer such as silicone or Thermosplastic Elastomer.

A plug is provided external to this feature which covers the venting orifice, this plug can be deformed or be removed completely by the user to relieve the pressure difference or clean the area cavity where it is seated., the design also prevents any condensate leaking externally form the shell and provides additional resistance to heat flow.

A feature to grip called the diametrical bar, tighten and loosen the lid is provided, to avoid over-tightening of the plastic lid on the metallic container, a short plastic feature provides just enough contact area to tighten the plastic lid to its resting location. To aid in ease of opening, raised features are provided on the circumference of the plastic lid.

Stackable Units

In the current invention Figure 3., the short plastic feature provides contact area to tighten the plastic lid into the metal shell also acts as a locating or resting feature the bottom side of the product.

The bottom plastic is so designed that it will rest in exact position with respect to the plastic feature on the lid. This design allows the user to stack the product on top of each other vertically, thus saving horizontal space.

This locating design is such that both sizes, i.e, 300ml and 500ml product can be stacked on top of each other irrespective of sizes above or below it. The design also enables to pair with different accessories for transportation.

In one aspect and in the most preferred embodiments, the invention relates to a food preserve thermal insulated box. It comprises of a double walled vacuum insulated hollow container shell with a body having a closed bottom and an open top side. A metallic foil disposed between the inner shell and the outer shell which enhances the insulation between the exterior and interior of the container. A getter material is also disposed between the outer shell and the inner shell and affixed onto one of the two shells. This container has a lid which is detachable and also insulated. This detachable hermitically sealed container lid is adapted to co-operatively couple with the container. The said lid has various portions such as a top lid portion and a bottom lid portion. Additionally an insulation portion is disposed between the said two portions of the lid and a venting aperture orifice is also provided. On the bottom portion of the container lid, a flat lid seal is arranged. This is along the perimeter. Another bottom lid seal is arranged on the bottom portion of container lid also along the perimeter. Additionally a deformable pressure venting plug means is arranged on the bottom lid portion of container lid and between the flat lid seal and the bottom lid seal and extending into the container body. A pressure release system is also made available. The pressure releasing system is a deformable and removable cap-like leak plug means disposed on the top lid portion of the container lid around the aperture ventilating orifice. A grip means is provided which is a diametric grip bar arranged top surface of the top lid portion of the container lid.

In another aspect, the food preserve thermal insulated box as described above is such that the outer shell has an alternating fluted configured surface.

In another aspect, the food preserve thermal insulated box as described above is such that the inner shell is configured to have visible level marks on its inner surface.

In another aspect, the food preserve thermal insulated box as described above is such that the container lid is configured to screw onto the container.

In another aspect, the food preserve thermal insulated box as described above is such that the deformable pressure venting plug means is made of a flexible polymer such as a silicone or thermoplastic elastomer.

In another aspect, the food preserve thermal insulated box as described above is such that the bottom side of the container is configured to complement the top lid portion of the container lid for vertical stacking engagingly.

The invention has been described with examples, embodiments etc. for the purpose of understanding the invention. All the modifications and variations are well within the scope of invention.