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:
May. 13, 2014
Filed:
Mar. 12, 2008
Hiroshi Mizuno, Miyagi, JP;
Akihiro Horii, Miyagi, JP;
Noriyuki Hirai, Miyagi, JP;
Masashi Ogawa, Miyagi, JP;
Yuu Miura, Miyagi, JP;
Kei Obata, Miyagi, JP;
Makoto Aoki, Miyagi, JP;
Hiroshi Mizuno, Miyagi, JP;
Akihiro Horii, Miyagi, JP;
Noriyuki Hirai, Miyagi, JP;
Masashi Ogawa, Miyagi, JP;
Yuu Miura, Miyagi, JP;
Kei Obata, Miyagi, JP;
Makoto Aoki, Miyagi, JP;
Dexerials Corporation, Tokyo, JP;
Abstract
A manufacture method of an optical sheet made of a transparent thermoplastic resin sheet on whose surface a regular geometric design working is performed, the optical sheet manufacture method comprising steps of performing a geometric design working on the resin sheet at a temperature not lower than a glass transition temperature of the resin sheet, by using a metal endless working belt formed with a geometric design on a surface thereof, rapidly cooling the resin sheet on which the geometric design working is performed to a temperature lower than the glass transition temperature, and detaching the rapidly cooled resin sheet from the metal endless working belt.