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Bladder for tire building apparatus and method of making the same

  • US 3,990,930 A
  • Filed: 08/21/1975
  • Issued: 11/09/1976
  • Est. Priority Date: 09/09/1971
  • Status: Expired due to Term
First Claim
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1. A method of making a bladder for use in conjunction with a tire building drum comprising:

  • (a) providing an at least partially cured generally cylindrical elastomeric membrane reinforced with parallel cords running generally axially of the membrane, (b) expanding the central portion of said membrane, (c) adhering a circumferentially extending belt to the surface of said membrane midway between the axially outer ends of the membrane, (d) permitting said membrane to contact to its generally cylindrical configuration and draw the belt radially inwardly to a reduced diameter, and (e) curing the belt while said membrane is in a generally cylindrical configuration.

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