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:
Feb. 28, 2017
Filed:
Oct. 24, 2012
Toyo Tire & Rubber Co., Ltd., Osaka-shi, Osaka, JP;
Yuji Inoue, Osaka, JP;
Syuuichi Nishikawa, Osaka, JP;
TOYO TIRE & RUBBER CO., LTD., Osaka-shi, JP;
Abstract
A manufacturing method of a pneumatic tire comprises a forming step of a tread rubber which includes a two-shot stage of simultaneously winding a first rubber ribbon constructed by a nonconductive rubber, and a second rubber ribbon constructed by a nonconductive rubber. In the two-shot stage, the first rubber ribbon and the second rubber ribbon which are adjacent to each other are spirally wound in such a manner as to come into contact with each other, and a ribbon winding position passes through an L-shaped route. A conductive rubber is partly provided in the first rubber ribbon in the winding process when the ribbon winding position passes through the L-shaped route. A conductive portion which spirally and continuously extends to the tread end from the ground-contacting surface and intermittently appears in the tire meridian cross section is formed by the conductive rubber.