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Method of producing food packaging with gas between tensioned film and lid

  • US 5,323,590 A
  • Filed: 06/24/1993
  • Issued: 06/28/1994
  • Est. Priority Date: 09/03/1986
  • Status: Expired due to Fees
First Claim
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1. A method for producing packaging comprising:

  • a) providing a base;

    b) providing a flexible material, said base being relatively rigid compared to said flexible material;

    c) providing goods engaged against said rigid base;

    d) providing said flexible material over said goods;

    e) holding said flexible material taut;

    f) engaging only portions of said flexible material near side edges of said goods with moving means independent of said flexible material;

    g) moving said moving means relative to said material to push said flexible material only at said engaged portions so the engaged portions move to a position below the top of the goods;

    h) tensioning and stretching the intermediate portions of said flexible material between said side portions by said movement;

    i) compressing said goods to said base by said stretching and tensioning;

    j) applying a lid over said base so there will be a space between said lid and said flexible material;

    k) securing said portions of said flexible material relative to said base below the top of said goods whereby said flexible material will engage and maintain said goods held to said base as a result of such tensioning and stretching;

    l) charging a gas in said space which will enhance the preservation of the goods; and

    m) sealing said flexible material and said lid to said base with said gas in said space, said flexible material allowing said gas to pass from said space to said goods to enhance preservation of said goods.

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