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:
Jul. 27, 1993
Filed:
Aug. 31, 1992
Applicant:
Inventors:
Susumu Matsumura, Kawaguchi, JP;
Masataka Yashima, Yokohama, JP;
Tsuyoshi Santoh, Yokohama, JP;
Osamu Kanome, Kawasaki, JP;
Kazuya Matsumoto, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
21912167 ; 21912172 ; 21912177 ; 21912183 ;
Abstract
An optical cutting method includes a step of detecting a center position on a sheet film with a position-detecting light flux; and a step of cutting out a disk film from the sheet film by projecting a cutting laser beam along circumference of a substantially circular form around the detected center position.