×

Radial tire belt folding drum

  • US 4,859,272 A
  • Filed: 06/22/1988
  • Issued: 08/22/1989
  • Est. Priority Date: 06/22/1988
  • Status: Expired due to Term
First Claim
Patent Images

1. A rotatable belt folding drum comprising a rotatable, cylindrical main shaft, a pair of central hub assemblies slidably mounted on said main shaft at opposite sides of a centerplane of said drum, a plurality of circumferentially spaced drum segments disposed in a generally cylindrical configuration around said central hub assemblies, each of said drum segments including slider members slidably mounted on said pair of central hub assemblies for radial movement of each of said drum segments relative to said central hub assemblies, a pair of annular turnup bladders positioned around said drum segments and each of said bladders having a cavity in communication with a source of fluid pressure, each of said drum segments including bladder support means slidably mounted on each of said drum segments and adjustably connected to said slider members for axial adjustment of said bladder support means at each end of said drum segments, said pair of turnup bladders being mounted on said bladder support means for axial adjusting movement with said bladder support means, spacing screw means in threaded engagement with said central hub assemblies, said screw means being rotatable for moving said central hub assemblies in opposite directions to lengthen and shorten the distance between said bladders, a pair of drum expanding hub assemblies slidably mounted on said main shaft at positions spaced axially from said central hub assemblies and at opposite sides of said central hub assemblies from said centerplane, link means connecting each of said drum expanding hub assemblies with an opposite end of each of said segments, drum diameter screw means in threaded engagement with said drum expanding hub assemblies and said drum diameter screw means being rotatable for expanding and contracting said segments.

View all claims
  • 9 Assignments
Timeline View
Assignment View
    ×
    ×