Unvulcanized tread material for pneumatic tire, method of manufa

Details Unvulcanized tread material for pneumatic tire, method of manufa Unvulcanized tread material for pneumatic tire, method of manufa

1992-10-02

1995-03-14

Ryan, Patrick J.

Stock material or miscellaneous articles

Plural parts with edges or temporary joining means each...

428163, 428172, 428212, 428493, 152209R, 152525, B32B 900

Patent

active

053976169

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.

REFERENCES:
patent: 1356891 (1920-10-01), Steinle
patent: 4169877 (1979-10-01), Olsen et al.
patent: 4698245 (1987-10-01), Schallmeier et al.
patent: 4739811 (1988-04-01), Rampl

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