Bag having an improved heat seal closure and associated methods

CAFC
  • US 7,544,403 B2
  • Filed: 11/03/2005
  • Issued: 06/09/2009
  • Est. Priority Date: 11/08/2002
  • Status: Active Grant
First Claim
Patent Images

1. A tamper-evident closure for a bag that comprises a tube having at least one layer of polymeric material, the closure comprising:

  • a first strip and a second strip at a first end of the bag, the first and second strips configured to transition between an open strip position in which the first and second strips are separated from each other and a closed strip position in which the first and second strips are in abutting contact with each other to thereby form a strip seal; and

    a bag seal zone between a second end of the bag and the first and second strips, wherein the second end of the bag is opposite the first end of the bag, wherein the bag seal zone is closer to the first end of the bag than to the second end of the bag, and wherein the bag seal zone comprises an inner surface of a front wall region of the tube in abutting contact with an inner surface of a back wall region of the tube,wherein the at least one layer of polymeric material comprises the abutting inner surfaces of the front and back wall regions, and wherein the abutting inner surfaces comprise a heat seal.

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