Supportive sidewall container for expandable food packages

• US 4,277,506 A
• Filed: 01/24/1980
• Issued: 07/07/1981
• Est. Priority Date: 01/24/1980
• Status: Expired due to Term

• Current Assignee: Waldorf Corp
• Original Assignee: Champion International Corporation (International Paper Company)
• Inventors: Austin, John J.
• Primary Examiner(s): Weinstein, Steven L.
• Application Number:
  US06/115,026
• Time in Patent Office: 530 Days
• Field of Search: 426/111, 426/124, 426/107, 426/234, 229/33, 229/31 R, 229/41 C, 229/41 D, 229/8, 229/DIG. 3, 229/36, 220/403, 220/404, 220/410, 220/462
• US Class Current: 426/111
• CPC Class Codes: B65D 2581/3421 Cooking pop-corn
• CPC Class Codes: B65D 5/0005 of variable capacity
• CPC Class Codes: B65D 81/3453 Rigid containers, e.g. trays, bottles, boxes, cups
• CPC Class Codes: Y10S 229/903 Ovenable, i.e. disclosed to be placed in an oven

Abstract

A paperboard container for use in a microwave oven to cook an expandable food has a square bottom support panel, upwardly and outwardly tapering, concave, trapezoidal side panels connected to each edge of the bottom support panel, and a cover of overlapped, top panels. A top panel is foldably connected to an upper arcuate edge of each of the side panels and a seal is removably attached to one of the top panels and an opposed one thereof to close the container. Upon expansion of the food within the container in a microwave oven, the concave side panels will expand to aid in confining the food within the perimeter of the container.

Claims

1. A non-metallic container housing an expandable food bag in a non-expanded stored condition and in an expanded condition upon heating, having a substantially increased volume, said container comprising:

a base portion including

a bottom support panel of regular polygonal shape,

an upwardly and outwardly extending side panel connected to each edge of said polygonally shaped bottom support panel, with the distal edge of each said side panel being arcuate in configuration, with each one of said side panels being connected to the adjacent one thereof by overlapping V-shaped extension panels and being bowed radially inwardly in a concave configuration to form with said bottom support panel a bowl receving said expandable food bag in stored condition, and

an integral cover enclosing and storing said expandable food bag in said bowl and providing additional side support for the bag when open and the bag is expanded, said cover including

a plurality of overlapped, separate top panels, each top panel having an edge, resiliently and foldably connected to one of said side panels, along the arcuate edge thereof, each top panel also having an arcuate top edge and side edges to compliment the shape of the upper edge of an adjacent side panel

one of said top panels being removably connected to a seal-tab, and

said seal being releasably attached to at least one of said remaining top panels, such that when said seal is released enabling the top panels of said cover to be opened, said side panels are capable of expanding and bowing radially outwardly to define a convex configuration thereby providing increased volume for said expandable food bag while confining said food bag within said container.

2. The container of claim 1 wherein said base portion and cover portion are formed from paperboard material.

3. The container of claim 2 wherein said bottom support panel is square in shape and each of said side panels is substantially trapezoidal in shape, one of the edges of each of said trapezoidal side panels being connected to one of the edges of said square-shaped bottom panel.

4. The container of claim 3 wherein every other side panel includes a V-shaped extension panel connected to opposite edges thereof which is overlapped and adhered to an adjacent side panel.

5. The container of claim 4 wherein said seal is rectangular in shape.

6. The container of claim 5 wherein each of said top panels is generally rectangular in shape and includes a base foldably connected to one of the edges of one of said trapezoidal side panels.

7. The container of claim 6 wherein said seal is connected to said one of said top panels along a perforated score line.

8. The container of claim 1 wherein said seal is connected to said one of said top panels along a perforated score line.

9. The container of claim 1 wherein said bottom support panel is square in shape and each of said side panels is substantially trapezoidal in shape, one of the edges of each of said trapezoidal side panels being connected to one of the edges of said square-shaped bottom panel.

10. The container of claim 1 wherein every other side panel includes a V-shaped extension panel connected to opposite edges thereof which is overlapped and adhered to an adjacent side panel.

11. The container of claim 1 wherein said seal is rectangular in shape.

12. The container of claim 1 wherein each of said top panels is generally rectangular in shape.