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:
Dec. 10, 2002
Filed:
Dec. 03, 1999
Takuzou Sano, Hiratsuka, JP;
The Yokohama Rubber Co., Ltd., Tokyo, JP;
Abstract
A metallic mold for tire curing is disclosed, which comprises a plurality of pieces for forming a tread pattern of a tire by sections, the pieces being fixed to a back block and arranged in an annular form. In this case, each piece is composed of a plurality of piece block layers laminated by performing a plurality of shots of die casting for metallic materials, and a very small gap is formed in a joined portion between the piece blocks by means of coagulation and contraction of the metallic materials. Because of this constitution, formation of a gap having necessary exhaust performance in an optional position of a molding surface can be facilitated. Accordingly, an appearance of a produced tire can be improved without preventing spew formation, and the production of defectives can be reduced during curing and molding.