Patent ID: 6896836
Filing Date: 2005-05-24
Classification: B29C,B29D,Y10S

Abstract:
1. A process for vulcanization of a pneumatic tire comprising a tread portion, a pair of sidewall portions and a pair of bead portions, comprising: venting a gas in a vulcanization mold received with an uncured product of the pneumatic tire at a position corresponding to the sidewall portion from a venting gap formed between two or more sub-rings of a side portion ring of the vulcanization mold in at least one location of the side portion ring in a radial direction of the tire so as to extend over a full circumference of the ring, and to extend across a full width of the side portion ring; wherein one of said two or more sub-rings contacts a tread ring of the vulcanization mold for forming the tread portion and another of said two or more sub-rings contacts a bead portion ring of the vulcanization mold for forming one of the bead portions.