Patent ID: 6827119
Filing Date: 2004-12-07
Classification: B29D

Abstract:
An improved radially expansible assembly drum for the manufacture of tires, comprising: a body mounted on a drum core assembly and presenting a radially movable receiving surface for tire components to be assembled, the ends of the receiving surface having the same or different diameters, a cam disk having a single cam follower groove, the cam follower groove providing a continuous range of selectable diameters of said receiving surface as a function of cam disk rotation, wherein said ends of the receiving surface are axially movable, wherein the drum core assembly includes a spindle for rotating the assembly drum, and a first external shaft being parallel and eccentrically located relative to the centerline of the spindle, wherein the first external shaft is connected to a first clutch mechanism, the engagement of the first clutch mechanism rotates the first external shaft to initiate radial expansion or contraction of the drum assembly, wherein the drum core assembly further includes a second external shaft connected to a means for axially moving the ends of the assembly drum, the second external shaft being parallel to and eccentrically located relative to the centerline of the spindle.