Plastic bag for vacuum sealing

  • US RE34,929 E
  • Filed: 01/22/1993
  • Issued: 05/09/1995
  • Est. Priority Date: 09/23/1985
  • Status: Expired due to Term
First Claim
Patent Images

1. A tubular receptacle adapted to be formed into an evacuated and sealed bag comprisingfirst and second superimposed plastic panels, each having a uniform thickness and defining inner and outer surfaces thereon, joined together at opposite lateral sides thereof to define a chamber adapted to have a product disposed therein,each of said first and second panels comprising an uniform inner layer, defining one of said inner surfaces thereon, composed of a heat sealable material, and an uniform outer layer composed of a gas impermeable material, anda plurality of raised protuberances having said uniform thickness and formed in a generally regular and waffle-like pattern on the inner surface of at least one of said first and second panels to project outwardly therefrom towards the inner surface of the other panel to define a plurality of intercommunicating channels entirely around and between said protuberances.

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