US3997101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Meat tray or the like
Assignee: Mobil Oil AS
•
Filing: 1975-04-21
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Granted: 1976-12-14
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Expires: 1995-04-21
Abstract
Abstract Stability of a thermoformed foam meat tray, especially to overwrapping by machine, is enhanced by a circumferential flange of the side walls of generally V-shaped cross section to terminate at approximately the plane of the bottom of the tray. Full nestability is afforded by upper surfaces of the flange at an angle to each other smaller than the corresponding angle between lower surfaces of the flange.
Inventors
- 👤 John Florian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:48
CPC Classifications
B; B65; B65D; B65D1/00; B65D1/34
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
166 words
In a thermoformed tray of foamed thermoplastic resin for packing meat and the like having a rectangular planar bottom and side walls integral with said bottom and with each other extending upwardly and outwardly from the margin of said bottom; the improvement which comprises flanges integral with the upper margins of said side walls, which flanges extend outwardly and downwardly from said margin of said side walls and terminate at a level substantially in the plane of said bottom to provide a circumferential member about said tray having the cross-section form of an inverted V; said circumferential member being of greatest thickness at the region of junction of said side wall and said flange, at least one of said side wall and said flange being tapered to a lesser thickness away from said junction, whereby the angle between inner surfaces of said circumferential member is greater than the angle between outer surfaces thereof to provide essentially line contact between circumferential members of trays in a stack.
Claim 2
Dependent Claim
166 words
In a thermoformed tray of foamed thermoplastic resin for packing meat and the like having a rectangular planar bottom and side walls integral with said bottom and with each other extending upwardly and outwardly from the margin of said bottom; the improvement which comprises flanges integral with the upper margins of said side walls, which flanges extend outwardly and downwardly from said margin of said side walls and terminate at a level substantially in the plane of said bottom to provide a circumferential member about said tray having the cross-section form of an inverted V; said circumferential member being of greatest thickness at the region of junction of said side wall and said flange, at least one of said side wall and said flange being tapered to a lesser thickness away from said junction, whereby the angle between inner surfaces of said circumferential member is greater than the angle between outer surfaces thereof to provide essentially line contact between circumferential members of trays in a stack.
Claim 3
Dependent Claim
10 words
A tray according to claim 1 formed of foamed polystyrene.
References Cited (Backward Citations)
US1938909A
Cited
US2053949A
Cited
US2041537A
Cited
US2766919A
Cited
US3220631A
Cited
US3684633A
Cited
US3718274A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-12-14 | 1980-06-14 | 1980-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-14 | 1984-06-14 | 1984-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-14 | 1988-06-14 | 1988-12-14 | $7700.00 | Window Closed / Lapsed |