Patent ID: 6343638
Filing Date: 2002-02-05
Classification: B29D,Y10T

Abstract:
A tire building drum assembly for folding edges of a wide breaker ply over edges of a narrow breaker ply wrapped around said wide breaker ply comprising a plurality of circumferentially spaced drum segments characterized by a center module mounted on each of said drum segments, a folding module mounted on each of said segments at each end of said center module, each said folding module having a nose piece movable axially of said drum from an axially outer position having the same diameter as the diameter of said center module to an axially inner position overlapping said center module, a folding belt wrapped around each said nose piece with an axially inner end fastened to said center module and an axially outer end connected to a spring means on said nose piece for maintaining tension in said belt providing a support for an overlap edge of said wide breaker ply in the axially outer position of said nose piece and providing for sliding movement of said belt over said nose piece upon said axial movement of said nose piece to said axially inner position for folding each said overlap edge of said wide breaker ply over each said edge of said narrow breaker ply.