Thermoplastic skin packing means

• US 5,115,624 A
• Filed: 03/28/1990
• Issued: 05/26/1992
• Est. Priority Date: 11/14/1985
• Status: Expired due to Fees

• Current Assignee: Seawell Corporation N.V.
• Original Assignee: Seawell Corporation N.V.
• Inventors: Garwood, Anthony J. M.
• Primary Examiner(s): Culver, Horace M.
• Application Number:
  US07/500,218
• Time in Patent Office: 790 Days
• Field of Search: 53/511, 53/509, 53/559, 53/171, 53/173, 53/433, 53/434, 53/449, 53/453, 53/475, 53/240, 53/244, 53/249, 53/427, 53/432, 426/119, 426/129, 426/118, 426/124, 426/324, 426/404, 206/526, 220/23
• US Class Current: 53/427
• 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 method of packaging goods including providing a base and placing goods over the base. A flexible web of gas permeable skin wrapping plastics material is then applied over the base and the goods, and air or gas is evacuated from between the base and the skin wrapping so as to allow the skin wrapper to flexibly displace onto the goods to at least partially skin pack the goods. A lid is then applied over the skin wrapping and spaced from the wrapping. A desired gas is then provided in the space between the lid and the skin wrapping to enhance the keeping properties of the packaged goods by permeating the skin wrapping. The lid is sealed to the base so that the space is permanently retained, and the skin wrapping is attached relative to the base.

Claims

1. A method of packaging goods including:

(a) providing a base,

(b) placing goods over said base,

(c) applying a flexible web of gas permeable skin wrapping plastics material over said base and said goods and relative to said base to hold said goods relative to said base,

(d) evacuating air or gas from between said base and said skin wrapping so as to allow said skin wrapper to flexibly displace onto said goods and to at least partially skin pack said goods,

(e) applying a lid over said skin wrapping and spaced therefrom,

(f) providing a desired gas in said space between said lid and said skin wrapping to enhance the keeping properties of the packaged goods by permeating said skin wrapping, and

(g) sealing said lid to said base so that said space is permanently retained, and attaching said skin wrapping relative to said base.

2. The method of packaging goods according to claim 1, in which said web is heated prior to its displacement over said goods and said base.

3. The method of packaging goods according to claim 1, in which said lid and said flexible web are jointly sealed to said based.

4. The method of packaging goods according to claim 1, wherein said base has a cup shaped depression in which said goods are placed and a peripheral lip around the perimeter of said cup, and wherein said step of displacing effects movement of said web towards said base to a position below said lip.

5. The method of claim 4, wherein at least a portion of said web displaced below said lip engages and is skin packed to side walls of said cup.

6. The method of claim 1, further including the step of placing a further flexible web over said base prior to placing said goods over said base whereby said goods are enveloped by said webs.

7. The method of claim 6, wherein said base has a generally cup shaped depression, and wherein said further flexible web is displaced into said cup.

8. The method of claim 7, wherein said further flexible web engages the bottom of said cup.

9. The method of claim 8, wherein said further flexible web engages at least a portion of the side walls of said cup, and said first recited web overlies said further web in skin packing relation.

10. The method of packaging goods according to claim 1, in which said lid is semi-rigid, and said method includes the further step of placing a utensil in said lid.

11. The method of packaging goods according to claim 1, in which said flexible web is urged by positive gas pressure there above into skin packing conformation with its associated goods.

12. The method of packaging goods according to claim 1, in which said lid is sealed to said base in a manner than renders said lid peelable from said base separately from said flexible web.

13. The method of packaging goods according to claim 1, in which said base is made from a gas permeable material.

14. The method of packaging goods according to claim 1, in which said base is made of a partial gas barrier material.

15. The method of packaging goods according to claim 1, in which said base is made of a high gas barrier material.

16. The method of packaging goods according to claim 1, in which said lid is made of a gas permeable material.

17. The method of packaging goods according to claim 1, in which said lid is made of a partial gas barrier material.

18. The method of packaging goods according to claim 1, in which said lid is made of a high gas barrier material.

19. The method of packaging goods according to claim 1, including the further step of placing a removable insert on said base prior to the placement thereon of goods or a flexible web.

20. The method of packaging goods according to claim 1, including the further step of placing an oven usable container on said base prior to the placement of goods therein.

21. The method of packaging goods according to claim 1, in which said lid and said flexible web are heat sealable to said base.

31. A method of packaging goods as claimed in claim 1, comprising providing bases, said web of flexible material and lids in continuous strips, and separating each completed package of packaged goods from the remainder of said strips.

22. A method of packaging goods comprising:

providing a base;

placing a first flexible web on said base;

placing first goods to be skin packed on said web;

providing a second gas permeable flexible web and displacing said second web towards said first goods so as to at least partially skin pack said first goods relative to said first web and to said base;

placing second goods to be skin packed on said second flexible web;

repeating the process by alternately placing further goods and flexible gas permeable webs one atop another and sealing the overlying flexible web relative to said base and over said goods until a desired number of goods have all been at least partially skin packed relative to said base;

applying a lid over the uppermost flexible web in spaced relation thereto;

providing the space between the uppermost web and said lid with a gas that will permeate said webs and prolong the preservation of said skin packed goods; and

sealing said lid to said base to retain said gas packed within the packaging.

23. The method of packaging goods according to claim 22, in which the space between the uppermost web and said lid is filled with a gas that will permeate said webs and prolong the preservation of said skin packed goods.

24. The method of packaging goods according to claim 22, in which the space between the lowermost web and said base is filled with a gas that will permeate said webs and prolong the preservation of said skin packed goods.

25. The method of packaging goods according to claim 23, in which said gas is oxygen, nitrogen, carbon dioxide, atmospheric air or other gas selected for its preservation characteristics.

26. The method of packaging goods according to claim 24, in which said gas is oxygen, nitrogen, carbon dioxide, atmospheric air or other gas selected for its preservation characteristics.

27. The method of packaging goods according to claim 22, in which each said flexible web is jointly sealed with said lid to said base.

28. The method of packaging goods according to claim 22, in which each said flexible web is heated prior to its displacement on said associated goods to enhance skin packing.

29. The method of packaging goods according to claim 22, in which each said flexible web is urged by positive gas pressure thereabove into skin packing conformation with its associated goods.

30. The method of packaging goods according to claim 22, in which said lid is sealed to said base in a manner that renders said lid peelable from said base separately from said flexible web.

32. A method of packaging goods as claimed in claim 22, comprising providing bases, said web of flexible material and lids in continuous strips, and separating each completed package of packaged goods from the remainder of said strips.

33. A method of packaging goods comprising:

providing a base;

placing goods to be packaged over said base;

placing a web of gas permeable flexible material above said base and said goods;

displacing said flexible web toward said goods and engaging said web over said goods so as to at least partially skin pack said goods relative to said base;

positioning a lid over said base and said flexible web in spaced relation to said web so as to define therewith a space;

providing the space between said lid and said flexible web with a gas that can permeate said flexible web and prolong the preservation of said skin packed goods; and

sealing said lid to said base to retain said gas within the packaging.