US3863832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Food container
Assignee: International Paper Co
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Filing: 1972-12-20
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Granted: 1975-02-04
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Expires: 1992-12-20
Abstract
Abstract Disclosed is a container for packaging foods and, particularly, refrigerated and frozen foods. The container includes a tray and a lid both of which are polyolefin coated paperboard.
Inventors
- 👤 Robert L Gordon
- 👤 John C Siegele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:10
CPC Classifications
B; B65; B65D; B65D77/00; B65D77/10; B65D77/20; B65D77/2024; B65D5/00; B65D5/20; B65D5/2038; B65D5/2047; B65D5/28; B65D5/42; B65D5/44; B65D5/48; B65D5/48002; B65D5/48022; B65D5/56; B65D81/00; B65D81/34; B65D81/343; B65D2577/00; B65D2577/10; B65D2577/20; B65D2577/2025; Y; Y10; Y10S; Y10S229/00; Y10S229/902; Y10S229/903; Y10S229/905
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
156 words
A container for packaging, storing and heating foods which comprises: a. a paperboard tray, the interior surface of which is coated with a thermoplastic, said tray including, i. a base portion ii. a plurality of upstanding walls foldably connected to said base portion, iii. a plurality of corner closures, each corner closure foldably connected to a respective one of said upstanding walls and overlapping bonded thereto, iv. horizontally disposed panels each foldably connected to the top of a respective one of said upstanding walls, the end of said panels abutting each other to form a peripheral flange, b. a lid disposed on said flange, the interior surface of said lid coated with a thermoplastic; and c. a heat sensitive adhesive connection between said lid and said flange wherein said heat sensitive adhesive connection is adapted to fail when the pressure within said container reaches a predetermined value whereby said lid is automatically seperated from said tray.
Claim 2
Dependent Claim
156 words
A container for packaging, storing and heating foods which comprises: a. a paperboard tray, the interior surface of which is coated with a thermoplastic, said tray including, i. a base portion ii. a plurality of upstanding walls foldably connected to said base portion, iii. a plurality of corner closures, each corner closure foldably connected to a respective one of said upstanding walls and overlapping bonded thereto, iv. horizontally disposed panels each foldably connected to the top of a respective one of said upstanding walls, the end of said panels abutting each other to form a peripheral flange, b. a lid disposed on said flange, the interior surface of said lid coated with a thermoplastic; and c. a heat sensitive adhesive connection between said lid and said flange wherein said heat sensitive adhesive connection is adapted to fail when the pressure within said container reaches a predetermined value whereby said lid is automatically seperated from said tray.
Claim 3
Dependent Claim
20 words
The container of claim 1 wherein the exterior surface of said trAy and said lid are coated with a thermoplastic.
Claim 4
Dependent Claim
10 words
The container of claim 1 wherein said thermoplastic is polypropylene.
Claim 5
Dependent Claim
10 words
The container of claim 2 wherein said thermoplastic is polyethylene.
Claim 6
Dependent Claim
18 words
The container of claim 3 wherein the thickness of said polyethylene coating is at least approximately 1 mil.
Claim 7
Dependent Claim
19 words
The container of claim 3 wherein said heat sensitive adhesive connection is provided by a pressure sensitive heat adhesive.
Claim 8
Dependent Claim
18 words
The container of claim 3 wherein said heat sensitive adhesive connection is provided by dry, heat activated adhesive.
Claim 9
Dependent Claim
20 words
The container of claim 3 wherein said paperboard has a basic weight in the range of 124 to 288 pounds.
Claim 10
Dependent Claim
42 words
The container of claim 1 wherein said thermoplastic coating on said lid is polyvinyl acetate and said thermoplastic coating on said tray is polyethylene and said heat sensitive adhesive connection is provided by a heat seal bond of polyethylene and polyvinyl acetate.
Claim 11
Dependent Claim
190 words
A container for packaging, storing and heating foods which comprises: a. a paperboard tray, the interior surface of which is coated with a thermoplastic, said tray including, i. a rectangular base portion, ii. a first pair of opposed, upstanding walls foldably connected to opposed edges of said base portion, iii. a second pair of opposed upstanding walls foldably connected to opposed edges of said base portions, iv. two pairs of corner closures, each pair foldably connected to a respective one of said first pair of opposed upstanding walls and overlappingly bonded to the adjacent second pair of opposed upstanding walls adjacent thereto, v. a horizontally disposed panel foldably connected to the top of each of said upstanding walls, the ends of said panels abutting each other to form a peripheral flange, b. a lid disposed on said flange, the interior surface of said lid coated with a thermoplastic; and c. a heat sensitive adhesive connection between said lid and said flange wherein said heat sensitive adhesive connection is adapted to fail when the pressure within said container reaches a predetermined value whereby said lid is automatically separated from said tray.
Claim 12
Dependent Claim
190 words
A container for packaging, storing and heating foods which comprises: a. a paperboard tray, the interior surface of which is coated with a thermoplastic, said tray including, i. a rectangular base portion, ii. a first pair of opposed, upstanding walls foldably connected to opposed edges of said base portion, iii. a second pair of opposed upstanding walls foldably connected to opposed edges of said base portions, iv. two pairs of corner closures, each pair foldably connected to a respective one of said first pair of opposed upstanding walls and overlappingly bonded to the adjacent second pair of opposed upstanding walls adjacent thereto, v. a horizontally disposed panel foldably connected to the top of each of said upstanding walls, the ends of said panels abutting each other to form a peripheral flange, b. a lid disposed on said flange, the interior surface of said lid coated with a thermoplastic; and c. a heat sensitive adhesive connection between said lid and said flange wherein said heat sensitive adhesive connection is adapted to fail when the pressure within said container reaches a predetermined value whereby said lid is automatically separated from said tray.
Claim 13
Dependent Claim
19 words
The container of claim 10 wherein the exterior surface of said tray and said lid are coated with thermoplastic.
Claim 14
Dependent Claim
10 words
The container of claim 11 wherein said thermoplastic is polyethylene.
Claim 15
Dependent Claim
16 words
The container of claim 10 wherein the thickness of said polyethylene coating is approximately 1 mil.
Claim 16
Dependent Claim
206 words
A container for packaging, storing and heating foods which comprises: a. a paperboard tray, the interior surface of which is coated with a thermoplastic, said tray including, i. a first base portion and a second base portion, ii. a first plurality of upstanding walls foldably connected to said first base portion, iii. a second plurality of upstanding walls foldably connected to said second base portion, one of said second plurality of upstanding walls foldably connected to one of said first plurality of upstanding walls, iv. a plurality of corner closures, each corner closure foldably connected to an adjacent upstanding wall and overlappingly bonded to the other adjacent upstanding wall, v. a horizontally disposed panel foldably connected to the top of each of said upstanding walls except the two upstanding walls which are foldably interconnected, the ends of said panels abutting each other to form a peripheral flange, b. a lid disposed on said flange, the interior surface of said lid coated with a thermoplastic; and c. a heat sensitive adhesive connection between said lid and said flange wherein said heat sensitive adhesive connection is adapted to fail when the pressure within said container reaches a predetermined value whereby said lid is automatically seperated from said tray.
Claim 17
Dependent Claim
206 words
A container for packaging, storing and heating foods which comprises: a. a paperboard tray, the interior surface of which is coated with a thermoplastic, said tray including, i. a first base portion and a second base portion, ii. a first plurality of upstanding walls foldably connected to said first base portion, iii. a second plurality of upstanding walls foldably connected to said second base portion, one of said second plurality of upstanding walls foldably connected to one of said first plurality of upstanding walls, iv. a plurality of corner closures, each corner closure foldably connected to an adjacent upstanding wall and overlappingly bonded to the other adjacent upstanding wall, v. a horizontally disposed panel foldably connected to the top of each of said upstanding walls except the two upstanding walls which are foldably interconnected, the ends of said panels abutting each other to form a peripheral flange, b. a lid disposed on said flange, the interior surface of said lid coated with a thermoplastic; and c. a heat sensitive adhesive connection between said lid and said flange wherein said heat sensitive adhesive connection is adapted to fail when the pressure within said container reaches a predetermined value whereby said lid is automatically seperated from said tray.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |