Food container

• US 4,804,137 A
• Filed: 12/11/1987
• Issued: 02/14/1989
• Est. Priority Date: 12/11/1987
• Status: Expired due to Fees

• Current Assignee: Colin F. Harby
• Original Assignee: Colin F. Harby
• Inventors: Harby, Colin F.
• Primary Examiner(s): Foster, Jimmy G.
• Assistant Examiner(s): Elkins, Gary E.
• Application Number:
  US07/131,737
• Time in Patent Office: 431 Days
• Field of Search: 220/23.2, 220/23.4, 229/120.01, 229/120.11, 229/114, 229/120, 229/901, 229/902, 229/903, 229/906, 229/125.19, 229/125.28, 229/125.29, 229/DIG. 8, 229/DIG. 14 , 229/23 R, 229/23 BT, 219/10.55 E, 426/107, 426/113, 426/114, 426/122, 426/123
• US Class Current: 229/114
• CPC Class Codes: B65D 5/2047 trapezoidal, e.g. to form a body with diverging side walls B65D5/2033 takes precedence
• CPC Class Codes: B65D 5/28 with extensions of sides permanently secured to adjacent sides, with sides permanently secured together by adhesive strips, or with sides held in place solely by rigidity of material
• CPC Class Codes: B65D 5/32 having bodies formed by folding and interconnecting two or more blanks each blank forming a body part, whereby each body part comprises at least one outside face of the box, carton or tray
• CPC Class Codes: B65D 5/68 Telescope flanged lids
• CPC Class Codes: B65D 81/343 specially adapted to be heated in a conventional oven, e.g. a gas or electric resistance oven
• CPC Class Codes: Y10S 229/906 Baked goods

Abstract

Disclosed is a container for packaging foods and particular frozen foods. The container includes a bottom tray and a like tray which has been inverted and turned 90 degrees to form a lid or cover for the bottom tray.

The tray is formed from a thermoplastic coated paperboard blank having a base portion, a plurality of cut and scored lines forming opposing upstanding walls when folded, and bonding panels extending from upper or lower edges of one pair of opposing upstanding walls. A cohesive emulsion is used on the bonding panels to secure the bottom tray to the lid.

The substantially identical cover and bottom tray can be made utilizing convential machinery and from various substrates including plastics. Other features of the container include vents for allowing release of pressure during heating and upwardly diverging walls allowing nesting. Another embodiment includes a compartmented container having multiple bottom trays and a single continuous cover unit.

Claims

1. A container for packaging and heating food comprising:

a. a bottom tray and a separately formed cover, each of said bottom tray and cover including;

1. a base portion, 2. walls attached to said base portion and forming a containment area therebetween, means attaching said walls to each other, 3. a bonding panel secured by a foldline to an edge of each of one pair of said walls and having a releasable adhesive thereon for securing the bottom tray and cover together and for repeated opening and closing of said container.

b. at least one of said bonding panels having an unbonded area forming a vent to release pressure from the interior to the exterior of said container, said at least one bonding panel further including cuts forming a bending area adjacent said foldline in said at least one bonding panel and in line with said unbonded area, said bending area allowing release of excessive pressure in said container.

2. The container of claim 1 wherein the walls slope outward from said base portions and away from each other thereby permitting nesting of the cover and bottom tray when not in use.

3. The container of claim 1 wherein at least some of said walls other than the pairs of walls have releasable adhesive thereon adapted to be secured to said releasable adhesive on said bonding panels during securement of the cover to the bottom tray.

4. A container for packaging and heating food comprising:

a. a plurality of bottom trays and a separately formed cover each said bottom tray comprising;

1. a base portion, 2. upstanding walls attached to said baase portion, means attaching said walls to each other, 3. a bonding panel extending upwardly from an edge of each of one pair of said walls and having a releasable adhesive thereon;

b. said cover comprising;

1. a base portion, 2. walls extending downwardly from said cover base portion, 3. a bonding panel extending downwardly from an edge of each of one pair of said walls and having a releasable adhesive thereon;

c. said cover having an area between said cover walls substantially equal to the total area between the bottom tray walls of all said bottom trays thereby allowing said bottom trays to be secured together and closed using said bottom tray bonding panels and said cover bonding panels.

5. The container of claim 4 wherein at least some of said walls other than the pairs of walls have releasable adhesive thereon adapted to be secured to said releasable adhesive on said bonding panels during securement of the cover to the bottom trays.

6. A container for packaging and heating food comprising:

a. a bottom tray and a separately formed cover, each of said bottom tray and cover including;

1. a base portions, 2. walls attached to said base portion and forming a containment area therebetween, means attaching said walls to each other, 3. a flap secured to each one of a pair of said walls along a foldline, a lock tab cut from each said flap and hinged to one of said flaps and said respective wall,

7. cuts formed within another pair of said walls and adapted to lockingly receive said lock tabs formed in an opposing one of said bottom trays and cover;

b. said cover walls extending downwardly and otuwardly away from said cover base portion, said bottom tray walls extending upwardly and outwardly from said bottom tray base portion;

c. said lock tabs and flaps being positioned interiorly of said walls when said cover and bottom tray are secured whereby said walls will guide said lock tabs into engagement with said slits when secured.