US4576278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purge trap tray
Assignee: Cryovac LLC
•
Filing: 1984-09-13
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Granted: 1986-03-18
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Expires: 2004-09-13
Abstract
Abstract The present invention relates to a food tray for supporting, containing and displaying food products which tend to exude or purge juices or liquids. In particular, the present invention relates to a food tray which comprises a sunken exudate reservoir. The reservoir is formed by adhering a sheet of a liquid impermeable material in a liquid tight manner to a raised shoulder area of a support portion of the tray to form a false bottom. The sheet material is further supported by standoffs rising up from the tray bottom. The sheet material is also perforated so as to allow flow of the exudate or purge through the sheet down into the reservoir where the exudate is trapped and retained out of contact with a food product which is located on top of said supported sheet. Preferably, the sheet material is opaque and the exudate is thereby hidden from view. Even more preferably, the sheet material is of the same color as the tray.
Inventors
- 👤 Stanislaus Laiewski
- 👤 Thomas A. Hessen
- 👤 Thomas R. Hardy
- 👤 Allie F. Gilvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:34
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/08; B65; B65D; B65D81/00; B65D81/24; B65D81/26; B65D81/261; B65D81/262
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
164 words
A purge trap tray adapted to display a product which exudes a purge, said tray comprising: (I.) a sunken reservoir area adapted to contain the liquid purge; (II.) a support portion adapted to support said product, said support portion comprising: (A) a shoulder area raised from and completely surrounding said sunken reservoir area; (B) standoff means rising from said sunken reservoir area; (C) a product supporting, perforated, liquid impermeable thermoplastic film supported by said standoff means, said film comprising: (i) a border area adhered to said shoulder in a liquid tight manner; (ii) a plurality of perforations having diameters adapted to allow capillary flow of purge into said reservoir; and, (iii) a centrally located perforation having a diameter adapted to allow free flow of the purge into said reservoir, said centrally located perforation having a greater diameter than that of any other perforation whereby flow of purge into the reservoir is increased and reverse flow of purge upon tilting of the tray is minimized.
Claim 2
Dependent Claim
164 words
A purge trap tray adapted to display a product which exudes a purge, said tray comprising: (I.) a sunken reservoir area adapted to contain the liquid purge; (II.) a support portion adapted to support said product, said support portion comprising: (A) a shoulder area raised from and completely surrounding said sunken reservoir area; (B) standoff means rising from said sunken reservoir area; (C) a product supporting, perforated, liquid impermeable thermoplastic film supported by said standoff means, said film comprising: (i) a border area adhered to said shoulder in a liquid tight manner; (ii) a plurality of perforations having diameters adapted to allow capillary flow of purge into said reservoir; and, (iii) a centrally located perforation having a diameter adapted to allow free flow of the purge into said reservoir, said centrally located perforation having a greater diameter than that of any other perforation whereby flow of purge into the reservoir is increased and reverse flow of purge upon tilting of the tray is minimized.
Claim 3
Dependent Claim
36 words
The purge trap tray of claim 1 wherein the tray material comprises polystyrene foam and the film comprises polyethylene which film is adhered to the tray shoulder in the film's border area by a heat seal.
Claim 4
Dependent Claim
21 words
The purge trap tray of claim 1 wherein the film is opaque to hide purge collected in the reservoir from view.
Claim 5
Dependent Claim
21 words
The purge trap tray of claim 1 including an absorbent material in the reservoir area, said material containing a bacterial agent.
Claim 6
Dependent Claim
25 words
The purge trap tray of claim 1 wherein the standoff means comprises at least two standoffs rising from said reservoir to a substantially equal height.
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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) | 1989-03-17 | 1989-09-16 | 1990-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-17 | 1993-09-16 | 1994-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-17 | 1997-09-16 | 1998-03-18 | $7700.00 | Window Closed / Lapsed |