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Rubber surface having non-stick ply turn-up bladder

  • US 5,250,142 A
  • Filed: 04/07/1992
  • Issued: 10/05/1993
  • Est. Priority Date: 07/27/1990
  • Status: Expired due to Term
First Claim
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1. A turn-up bladder having an outer surface for contacting an uncured tire ply, the bladder comprising:

  • a bladder body made of a first rubbery polymer, the bladder body having an inner and an outer surface;

    a fabric secured to the outer surface of the bladder body by being at least partially embedded therein;

    a layer of a second rubber polymer on the outer surface of the bladder, the second rubbery polymer layer being in contact with the fabric on the side of the fabric opposite the bladder body, the second rubbery polymer being less adhesive to uncured tire ply than the first rubbery polymer;

    wherein the layer of second rubbery polymer is at least partially secured to the bladder body by the fabric.

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