The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 06, 2018
Filed:
Aug. 26, 2014
Sumitomo Rubber Industries, Ltd., Kobe-shi, Hyogo, JP;
SUMITOMO RUBBER INDUSTRIES, LTD., Kobe-shi, Hyogo, JP;
Abstract
The present invention increases tire formation precision and is a tire manufacturing method, which comprises a step Sfor forming a green tire on the outer surface of a rigid inner mold and a vulcanization step Sfor vulcanizing the green tire. The rigid inner mold comprises: an inner mold body, which is obtained from multiple segments; a core, which substantially binds the various segments; and an outer diameter adjusting means for changing the outer diameter of the core by changing the temperature of the core. Moreover. the rigid inner mold performs changes such that by expansion of the outer diameter of the core, the various segments move outward in the radial direction of the tire and gaps between the segments are enlarged, while by reducing the outer diameter of the core, the various segments move inward in the radial direction of the tire and the level differences R on the outer surface between adjacent segments increase. The vulcanization step Scomprises an adjustment steps Sfor adjusting the outer diameter of the core using the outer diameter adjustment means so that the gaps G and the level differences R are within a previously established range.