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:
Sep. 21, 2004
Filed:
Feb. 19, 2002
Yasuyuki Ishihara, Toukai, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A press die for molding a sipe blade is provided, including a pair of divided parts. A material for the sipe blade is interposed and pressed between the pair of divided parts to mold a sipe blade. Portions of the divided parts of the press die to which a load is applied by molding pressure in contact with the material to give a desired shape to the sipe blade have shapes corresponding to the desired shape of the sipe blade, and portions of the divided parts of the press die to which a load is not applied are provided with first relief parts which do not correspond to the desired shape of the sipe blade and do not substantially contact the molded sipe blade. A press die for molding a sipe blade is composed of a pair of divided parts composing a press die and , and a material for the sipe blade is interposed and pressed between the pair of divided parts to mold a sipe blade and is characterized in that portions and to which is applied a load caused by a molding pressure in contact with the material for giving a desired shape to the sipe blade have the shapes corresponding to a desired shape of the sipe blade , and portions and to which is not applied a load caused by molding pressure without contacting with the material are provided with first relief parts which do not correspond to the desired shape of the sipe blade and do not substantially contact with the sipe blade after molded.