| 摘要 |
It is an object of the invention to provide a producing method of a pneumatic tire capable of discharging static electricity of a vehicle to a road surface. The tread portion of the tire includes a conductive inner conductive portion which is in conduction with a rim when the rim is assembled, and an annular cap rubber portion whose inner peripheral surface is in contact with the inner conductive portion and whose outer peripheral surface comes into contact with a road surface. The producing method comprising a cap rubber forming step for forming a cylindrical unvulcanized cap rubber portion by spirally winding a ribbon-like unvulcanized rubber strip (28) around a center shaft of a substantially cylindrical to-be-wound body (23), wherein the cap rubber forming step includes a simultaneous winding step for simultaneously winding the non-conductive rubber strip (28A) and the conductive rubber strip (28B) around the to-be-wound body by using applicators (24A) and (24B) for guiding the rubber strips (28A) and (28B). |
