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. 07, 2010
Filed:
Aug. 27, 2007
Kanji Sekihara, Toyokawa, JP;
Akihiko Matsumoto, Toyokawa, JP;
Yoshihiro Okumura, Toyohashi, JP;
Konica Minolta Opto, Inc., Tokyo, JP;
Abstract
A mold assembly that is adapted to clamp fixed mold and movable mold together while making temperature adjustment and inject a molding material into a molding cavity provided therebetween, thereby producing an optical part. The mold assembly is one including fixed platen supporting fixed mold, provided on a part of its mold-side surface with locating hole and including ring of configuration with external and internal surfaces, fitted at its external surface in the locating hole, wherein the fixed mold is provided with a locating projection protruding toward the fixed platen, fitted in the internal surface of the locating hole, and wherein the ring consists of a material whose linear expansion coefficient is smaller than those of the material of the fixed platen and the material of the locating projection.