| 摘要 |
PURPOSE:To improve wet gripping performance, wear resistance and draining performance, by providing a plurality of splits tilting to the equator of a tire extending over about a whole width of a tread surface of the tire after vulcanization of a green cover tire. CONSTITUTION:A green cover tire which is made into a toroidal state by combining a carcass 7, a belt layer 8, a bead part and a tread part 2 on a molding drum is arranged in a metal die by a conventional method for vulcanization. Then a slit 9 is processed on an original tire taken out of the metal die by a cutter. The slit 9 can be formed without having groove width substantially by a notch crossing a protruded part between main grooves 4, 4 of a tread part 2 provided by making use of cutters such as a comparatively thin knife and bit. Then the slit 9 is provided on a tire in a tilting state to the equator C of the tire 1 extended over a whole width of the tire 1. |
