Unvulcanized tread material for pneumatic tire, method of manufacturing pneumatic tire, and pneumatic tire obtained by method
AssigneeBridgestone Corporation
InventorYasutoshi Aoki
Life of this patent
Estimating the term…
Abstract
An unvulcanized tread material for a pneumatic tire, including two layer members of a cap layer and a base layer and having a structure in which one or more portions of the base layer member project into the cap layer. The one or more portions of the base layer member project into the cap layer so as to respectively oppose one or more circumferential direction grooves to be formed in a manufactured tire. An interior of a mold is pressurized so that one or more convex portions, for forming a tire groove, of the mold and one or more projecting portions of the base layer member respectively contact. A manufactured tire in which the base layer member is exposed at bottoms of one or more grooves is formed.
Claims8
An unvulcanized tread material for a pneumatic tire comprising two layer members of a cap layer and a base layer, said cap layer and said base layer being arranged such that at least one portion of said base layer member projects into said cap layer and is exposed at an outer surface of said cap layer.
An unvulcanized tread material for a pneumatic tire comprising two layer members of a cap layer and a base layer, said cap layer and said base layer being arranged such that at least one portion of said base layer member projects into said cap layer and opposes a corresponding at least one circumferential direction groove to be formed in a manufactured tire.
Dependencies are inferred from the claim text.