Web and method for making fluid filled units

  • US 7,897,220 B2
  • Filed: 11/08/2006
  • Issued: 03/01/2011
  • Est. Priority Date: 06/01/2004
  • Status: Active Grant
First Claim
Patent Images

1. A web for forming dunnage units, comprising:

  • a first elongated layer;

    a second elongated layer superposed over the first elongated layer, the first and second layers connected together at an inflation edge and an opposite edge;

    a plurality of transverse seals extending from the opposite edge to within a first predetermined distance from the inflation edge, wherein said opposite edge and said transverse seals form a plurality of inflatable adjacent pouches;

    a plurality of inflation edge lines of perforations through the first and second elongated layers that extend inward from the inflation edge;

    a plurality of opposite edge lines of perforations through the first and second elongated layers that extend inward from the opposite edge; and

    a plurality of gap forming lines extending between the inflation edge lines of perforations and the opposite edge lines of perforations, wherein the gap forming lines are configured such that inflation of the pouches causes said web to separate along the gap forming lines such that adjacent pouches move away from one another in the area of the gap forming lines and wherein said inflation edge lines of perforations are configured such that inflation of the pouches leaves the inflation edge perforations intact.

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