Patent ID: 7318714
Filing Date: 2008-01-15
Classification: B29D

Abstract:
1. A core for manufacturing pneumatic tires, comprising: a plurality of segments that are aligned in contact with each other to form a toroidal assembly; and a pair of retainer rings engageable with said assembly axially from both sides so as to retain said plurality of segments in an assembled state, said core defining an inner surface of a tire from its formation up to completion of vulcanization of the tire, wherein said segments are each divided into a center portion that corresponds to a center portion of the tire in its width direction, and side portions that correspond to both side portions of the tire, respectively, said center portion and said side portions of each segment being detachably connectable to each other, wherein each of the segments further comprises a base portion integrally arranged on an inner peripheral side of the center portion, and wherein the side portions and the base portion of each segment are provided with positioning/assembling portions for the side portions, respectively, the positioning/assembling portions configured such that the side portions and center portion of each segment can be detached from each other while still within the tire after the tire has been vulcanized.