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Tire retreading bladder

  • US 4,293,293 A
  • Filed: 09/15/1980
  • Issued: 10/06/1981
  • Est. Priority Date: 05/02/1979
  • Status: Expired due to Term
First Claim
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1. A tire retreading bladder comprising a generally annular member of a U-shaped cross-section defined by a bight portion and a pair of legs, said annular member defining an interior volume, each leg terminating in a terminal edge of a generally circular configuration, each leg having interior and exterior surfaces, means disposed along each of said exterior surfaces for venting air from between such exterior surfaces and an interior surface of an associated tire adapted to receive therewithin said bladder, each of said venting means on each of said exterior surfaces having a radially inboard portion terminating radially short of the associated terminal edge, each exterior surface defining between said radially inboard portions of each venting means and the associated terminal edge a generally smooth uninterrupted annular sealing surface, said venting means being in the form of a plurality of pairs of closely adjacent ribs with each pair of ribs setting off a venting groove therebetween, and said venting means further including transverse venting slots being disposed lengthwise along said ribs.

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