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. 15, 1992
Filed:
Sep. 10, 1990
Applicant:
Inventors:
Tetsuya Sato, Kawasaki, JP;
Osamu Kanome, Kawasaki, JP;
Hitoshi Yoshino, Tokyo, JP;
Hirofumi Kamitakahara, Yokohama, JP;
Hisanori Hayashi, Kawasaki, JP;
Tsuyoshi Santoh, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; B29C / ;
U.S. Cl.
CPC ...
264167 ; 291216 ; 29132 ; 264-13 ; 264106 ; 2642102 ; 26421112 ; 425327 ; 425363 ; 425377 ; 425810 ;
Abstract
A process for preparing a substrate sheet for optical recording mediums includes the steps of extruding a molten resin to form a resin sheet and bringing the resin sheet into pressure between a preformat roll and a roll disposed opposingly to said preformat roll to transfer a preformat pattern to the surface of the resin sheet, wherein the roll disposed opposingly to the preformat roll includes a roll whose surface is covered with an elastomeric resin.