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Method and apparatus for forming slider end stops on zipper

  • US 6,743,330 B2
  • Filed: 05/17/2002
  • Issued: 06/01/2004
  • Est. Priority Date: 05/17/2002
  • Status: Expired due to Fees
First Claim
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1. A system comprising an ultrasonic welding assembly comprising a horn and an anvil, wherein said horn comprises two prongs separated by a gap, each of said prongs comprising an end surface confronting said anvil, each of said end surfaces having at least a portion that is flat, said flat portions being generally coplanar, and further comprising a flexible zipper comprising first and second zipper strips made of thermoplastic material, said first and second zipper strips comprising respective closure elements that have mating profiles, wherein respective portions of said zipper lie between said respective prongs and said anvil, with a connecting portion of said zipper spanning said gap.

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