Patent ID: 6105648
Filing Date: 2000-08-22
Classification: B29D,F16C

Abstract:
A tire building apparatus for preparing pneumatic tire blanks in which tire layers are received on a building drum, said apparatus comprising a pressure roll for cooperating with the building drum to apply pressure to the tire layers thereon, said pressure roll including a non-rotatable shaft extending in a longitudinal direction of the pressure roll, a plurality of uniformly shaped radial discs on said shaft, each disc including an interior part individually slidably supported on said shaft for movement radially relative to said building drum and an exterior ring surrounding said interior part and rotatably supported on said interior part, said interior part having a recess whose length is greater than the corresponding size of the shaft, the recess having sidewalls slidably engaged on sidewalls of said shaft for movement in a radial direction relative to the building drum, said shaft having a plurality of radial bores, one for each disc, a piston secured in said interior part of each disc and slidably engaged in a respective one of said radial bores in the shaft, said shaft having channels connected to respective bores to supply pressure medium thereto such that each disc is radially movable on said shaft under the guidance and control of the respective piston in its respective bore in the shaft.