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Process and apparatus for forming fastener elements

  • US 6,524,507 B1
  • Filed: 07/17/2000
  • Issued: 02/25/2003
  • Est. Priority Date: 11/20/1997
  • Status: Expired due to Fees
First Claim
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1. A mold roll for producing a fastener for engaging loops, the fastener comprising a base and a field of fastener elements molded with and extending from said base, the fastener elements constructed to engage loops of a mating loop component to form a releasable fastener, the mold roll including a pair of adjacent molding rings defining molding cavities extending inwardly from a surface for molding a set of the fastener elements therein the pair of molding rings includinga first molding ring defining therein a first set of mold cavities for molding base portions of the set of the fastener elements;

  • and a second molding ring defining therein a second set of mold cavities, aligned with the first set of mold cavities of the first molding ring, for molding distal portions of the set of fastener elements to overhang said base, the cavities of the first molding ring forming channels extending from an outer surface of the first molding ring to openings circumscribed by a surface of the first molding ring adjacent the second molding ring, through which resin flows to fill the mold cavities of the second molding ring.

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