Improved thermoplastic skin packing means

• US 4,840,271 A
• Filed: 06/19/1987
• Issued: 06/20/1989
• Est. Priority Date: 11/14/1985
• Status: Expired due to Fees

• Current Assignee: Seawell North America Incorporated
• Original Assignee: Garwood Ltd.
• Inventors: Garwood, Anthony J. M.
• Primary Examiner(s): Culver, Horace M.
• Application Number:
  US07/086,046
• Time in Patent Office: 732 Days
• Field of Search: 206/542, 206/213.1, 206/526, 220/23, 220/212, 426/119, 426/129, 426/118, 426/124
• US Class Current: 206/213.1
• CPC Class Codes: B65B 11/50 Enclosing articles, or quantities of material, by disposing contents between two sheets, e.g. pocketed sheets, and securing their opposed free margins apparatus or devices for forming pockets in or from sheets, blanks or webs B65B47/00
• CPC Class Codes: B65B 31/00 Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
• CPC Class Codes: B65D 2565/387 Materials used as gas barriers
• CPC Class Codes: B65D 2565/388 Materials used for their gas-permeability
• CPC Class Codes: B65D 81/2076 in an at least partially rigid container
• CPC Class Codes: Y02W 30/80 Packaging reuse or recycling, e.g. of multilayer packaging bio-packaging Y02W90/10

Abstract

A package containing skin-packed perishable goods including a base, goods on the base, a flexible plastic web over the goods and the base to, at least partially, skin pack the goods, and a lid for the base. A gas to permeate the web and enhance preservation of the goods is contained in the space between the lid and the skin packed goods.

Claims

1. An improved package for perishable goods comprising:

a base over which said goods are placed;

a gas permeable flexible web covering and at least partially skin packing said goods and holding said goods relative to said base, said web being sealed to said base;

a lid positioned over the top of said base and sealed to said base over said flexible web;

a space above said goods formed between said flexible web and said lid; and

a gas retained in said space, said gas selected for enhancing preservation of the packaged goods by permeation of said gas through said gas permeable web.

2. The improved package of claim 1 in which the base is made of a gas permeable plastic material.

3. The improved package of claim 1 in which the base is formed of a material that creates a partial gas barrier.

4. The improved package of claim 1 in which the base is formed of a high gas barrier material.

5. The improved package of claim 1 in which said base is about 450 microns thick.

6. The improved package of claim 1 in which said web forms a partial gas barrier.

7. The improved package of claim 1 in which said web is from 50-100 microns thick.

8. The improved package of claim 1 in which said lid is gas permeable.

9. The improved package of claim 1 in which said lid forms a very high gas barrier.

10. The improved package of claim 1 in which said lid forms a partial gas barrier.

11. The improved package of claim 1 in which said lid is from 80-120 microns thick.

12. The improved package of claim 1 in which the space between said lid and said web contains an amount of gas needed to preserve the goods for an extended period, the nature of the goods determining the gas selected.

13. The improved package of claim 12 in which said gas is oxygen, nitrogen, carbon dioxide, atmospheric air or another gas, or combinations thereof, selected for its preservation characteristics.

14. The improved package of claim 1 in which said lid is affixed to said base so that it may be removed from the package separately from said web.

15. The improved package of claim 1 in which said lid and said web are peelable as a unit from said base.

16. The improved package of claim 1 in which said base is made of P.V.C., said flexible web is made of plasticized P.V.C. and said lid is made of P.V.C.

17. The improved package of claim 1 in which said base is made of a P.V.C./E.V.A. laminate, said web is made of plasticized P.V.C. and said lid is made of P.V.C.

18. The improved package as in claim 1, in which said base is made of P.V.C., said web is made of plasticized P.V.C. and said lid is made of a P.V.C./E.V.A. laminate.

19. The improved package of claim 1 including a further gas permeable flexible web sealed relative to said base, said further web underlying and, in cooperation with said first web, substantially completely skin packing said goods.

20. The improved package of claim 19 in which said further web is dimensioned so as to form a space between it and the base, said space being filled with a gas selected for enhancing preservation of the packed goods.

21. The improved package of claim 19 in which the gas between said further web and said base is different from that between said first web and said lid.

22. The improved package of claims 1 or 19 in which said lid provides a containing space for an eating implement.

23. The improved package of claims 1 or 19 further including an oven-microwave usable tray positioned between said base and said skin packed goods.

24. The improved package of claim 19 in which said base contains a plurality of skin packed goods, said goods being arranged on said base one on top of the other, said goods each being individually skin packed.

25. The improved package of claim 19 in which said bottommost skin packed goods are so positioned as to provide a gas retaining space between said base and said goods, said space being filled with a gas selected to enhance the preservation of the goods.

26. The improved package of claim 25 in which said gas may be oxygen, nitrogen, carbon dioxide, atmospheric air or another suitable gas.

27. The improved package of claim 1 in which said web is urged into skin packing conformation with said goods by reducing the gas pressure below said web.