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Molded head harness

  • US 5,481,763 A
  • Filed: 12/07/1994
  • Issued: 01/09/1996
  • Est. Priority Date: 01/28/1993
  • Status: Expired due to Fees
First Claim
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1. A process for making a head harness which is adapted for use in securing a respirator mask to the face of a wearer, comprising the steps of:

  • a) inserting a moldable web into a mold, the web comprising a central portion and a peripheral portion extending at least partially around the central portion, the mold being adapted to receive the web as an insert and having a mold cavity shaped to permit the molding of a plurality of elastomeric fastening straps formed integrally with the peripheral portion of the web;

    b) positioning and securing the web within the mold so that the peripheral portion of the web can extend into the mold cavity during the molding process;

    c) clamping the blocks of the mold together at a suitable clamping pressure to thereby clamp the central portion of the web;

    d) contacting the peripheral portion of the web with a molten elastomeric resin in a quantity sufficient to embed the peripheral portion of the web in the molten resin and form a plurality of elastomeric fastening straps which are integral with the peripheral portion of the web;

    e) maintaining suitable pressure and temperature in the mold for a time sufficient to cure the resin and thereby form the head harness;

    f) releasing the clamping pressure of the mold blocks; and

    g) removing the head harness from the mold.

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