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Bladder for shaping pneumatic tire

  • US 3,963,394 A
  • Filed: 06/25/1975
  • Issued: 06/15/1976
  • Est. Priority Date: 06/25/1975
  • Status: Expired due to Term
First Claim
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1. An expandable bladder for shaping a pneumatic tire, comprisinga thick, substantially cylindrical center section having a multiplicity of convolutions on the inner surface of said section, said convolutions extending perpendicular to the axis of the cylindrical section and thereby providing local reductions in thickness and additional axial extensibility to the bladder;

  • a pair of annular, beaded end sections extending inwardly from each end of the cylindrical center section; and

    reinforcing material extending through the center section and end sections to limit the axial extensibility of the bladder.

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