US3756492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High strength open bottom packaging tray
Assignee: PACKAGINING Corp OF AMERICA A DE CORP
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Filing: 1972-05-24
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Granted: 1973-09-04
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Expires: 1992-05-24
Abstract
Abstract A tray of molded wood pulp or the like is provided for the packaging of food, such as produce, preferably in conjunction with an overwrapped transparent film. The tray bottom is formed of a plurality of upright U or V shaped ribs joining or intersecting in two directions and defining open windows therebetween, the height of each V shaped rib being on the order of several times the thickness of remainder of the tray, and the total volume of the inverted V shaped ribs being about equal to the volume of a bottom of a solid bottom tray of the same size.
Inventors
- 👤 R Reifers
- 👤 K Bixler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:27
CPC Classifications
B; B65; B65D; B65D1/00; B65D1/34
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
170 words
In a generally rectangular molded tray primarily for the packaging of food in conjunction with the transparent overwrap film heat-sealed thereabout, said tray comprising a pair of upwardly and outwardly inclined opposite side walls, each of said side walls forming a long side of said tray; and a pair of upwardly and outwardly inclined opposite end walls, each said end wall being adjacent to each said side walls and disposed at generally right angles thereto and thereby forming the rectangular configuration of said tray; the improvement comprising: means for providing visibility to the bottom of the tray and for supporting the food at the bottom of said tray, said means comprising a plurality of ribs having an upright V-shaped cross-section, said ribs extending at least partly across said tray in at least two directions to define therebetween a plurality of open windows, said ribs forming the tray bottom having a volume substantially equal to the volume of a bottom of a tray of equal size having a flat, solid bottom.
Claim 2
Dependent Claim
170 words
In a generally rectangular molded tray primarily for the packaging of food in conjunction with the transparent overwrap film heat-sealed thereabout, said tray comprising a pair of upwardly and outwardly inclined opposite side walls, each of said side walls forming a long side of said tray; and a pair of upwardly and outwardly inclined opposite end walls, each said end wall being adjacent to each said side walls and disposed at generally right angles thereto and thereby forming the rectangular configuration of said tray; the improvement comprising: means for providing visibility to the bottom of the tray and for supporting the food at the bottom of said tray, said means comprising a plurality of ribs having an upright V-shaped cross-section, said ribs extending at least partly across said tray in at least two directions to define therebetween a plurality of open windows, said ribs forming the tray bottom having a volume substantially equal to the volume of a bottom of a tray of equal size having a flat, solid bottom.
Claim 3
Dependent Claim
11 words
A tray in accordance with claim 1 molded of wood pulp.
Claim 4
Dependent Claim
17 words
A tray in accordance with claim 1 wherein said end and side walls are of bowed construction.
Claim 5
Dependent Claim
27 words
A tray in accordance with claim 1 further comprising an annular V-shaped rib extending around the periphery of the bottom portion and to which said ribs extend.
Claim 6
Dependent Claim
29 words
A tray in accordance with claim 4 wherein said annular rib in the areas of said side walls extend upwardly and directly and smoothly merge into said side walls.
Claim 7
Dependent Claim
44 words
A tray in accordance with claim 1 wherein the thickness of material from which said tray is made is greater in the area of said V-shaped ribs such that said ribs are filled in to a large extent on the inside of said tray.
Claim 8
Dependent Claim
17 words
A tray in accordance with claim 1 molded of wood pulp with a screen textured outer surface.
Claim 9
Dependent Claim
50 words
A tray in accordance with claim 1 wherein some of said ribs extend across said tray generally parallel to said side walls, and the remainder of said ribs extend across said tray generally parallel to said end walls, said ribs crossing at substantial right angles to define said open windows.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |