Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent
1992-02-27
1993-04-27
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
152456, 264326, 425 32, 425 43, B29C 3506, B60C 306
Patent
active
052059782
ABSTRACT:
A pneumatic tire having improved high-speed running performances is manufactured by conducting vulcanization of a green tire with a mold provided at a position corresponding to a given position between neighborhood of shoulder portion and neighborhood of bead portion with at least one protrusion which protrudes inside the mold and continuously extends in the circumferential direction of the mold and consists of a first arc segment having a center of curvature located outside from the inner surface of the mold and second arc segments each having a center of curvature located inside from the inner surface of the mold and smoothly connecting to the first arc segment at upper and lower ends in the radial direction of the mold.
REFERENCES:
patent: 3363660 (1968-01-01), Mirtain
patent: 4124679 (1978-11-01), DeWitt
patent: 4222424 (1980-09-01), Tsuzura et al.
patent: 4763708 (1988-08-01), Takahashi et al.
Ushikubo Hisao
Yamazaki Tadashi
Bridgestone Corporation
Silbaugh Jan H.
Vargot Mathieu
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