Title:
【発明の名称】ビードフイラーの組立方法
Document Type and Number:
Japanese Patent JPH03500992
Kind Code:
A
Abstract:
PCT No. PCT/GB88/00985 Sec. 371 Date May 1, 1990 Sec. 102(e) Date May 1, 1990 PCT Filed Nov. 14, 1988 PCT Pub. No. WO89/04250 PCT Pub. Date May 18, 1989.In the manufacture of a pneumatic tire the approximately triangular space immediately radially inward of each bead of the tire is filled by an apex construction made by helically winding uncured rubber strip. The tapered configuration is achieved by winding from a position progressively closer to a support surface so that the windings become progressively more oblique. Width reduction of the rubber strip can be achieved by subjecting it to progresively greater tension during winding. The winding of the apex formation may be interrupted while an end of a carcass play is turned over the bead and incomplete apex. Turns of unsheathed wire may be wound over the carcass ply end and then winding of the uncured rubber strip continued until the apex formation is completed. In one modification (FIG. 5) the carcass ply is incorporated in a wound bead assembly. In another (FIG. 3) windings of a harder material such as Kevlar are interposed between windings of uncured rubber.
Inventors:
Holloid, Eritsk
Wright, Anthony Lichyard
Wright, Anthony Lichyard
Application Number:
JP50886188A
Publication Date:
March 07, 1991
Filing Date:
November 14, 1988
Export Citation:
Assignee:
BRIDGESTONE/FIRESTONE,INCORPORATED
International Classes:
B29D30/48; B60C15/04; B60C15/06; (IPC1-7): B60C15/06; B29D30/48
Attorney, Agent or Firm:
Heikichi Odashima