Pneumatic radial tires

Details Pneumatic radial tires Pneumatic radial tires

1993-01-26

1995-04-04

Bushey, Charles S.

Plastic article or earthenware shaping or treating: apparatus

Reshaping, resizing or vulcanizing means for tire, tire...

Toroidal or annular female shaping means and coacting means...

425 35, 425 52, 264326, B60C 304

Patent

active

054031745

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: 1378678 (1921-05-01), Hoffmann
patent: 1388382 (1921-08-01), Schwartz
patent: 1642541 (1927-09-01), Ellinwood
patent: 1841408 (1932-01-01), Glynn
patent: 2451992 (1948-10-01), Tegrotenhuis
patent: 3542107 (1970-11-01), Mills
patent: 3553790 (1971-01-01), Brobeck et al.
patent: 3961657 (1976-06-01), Chrobak
patent: 4222424 (1980-09-01), Tsuzura et al.
patent: 4776781 (1988-10-01), Sakai

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