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:
Apr. 12, 1977
Filed:
Jul. 31, 1975
Shigehiro Komori, Yokohama, JA;
Hisashi Sakamaki, Yokohama, JA;
Hiroyuki Hattori, Mitaka, JA;
Toshihide Iida, Tokyo, JA;
Koichi Miyamoto, Tokyo, JA;
Kazumi Umezawa, Yokohama, JA;
Canon Kabushiki Kaisha, Tokyo, JA;
Abstract
This invention provides an electrophotographic device by which the surface potential of the photosensitive member is made substantially uniform at the time of termination of the photocopying process by rotating the photosensitive member through one revolution after the completion of the copying process while subjecting the photosensitive member to A.C. corona discharge or light exposure. Further, the reflecting mirror and the in-mirror lens are integrally rotated so as to adjust the light path length to obtain the most effective exposure. Moreover, the ratio of width of the central portion and both end portions of the slit for exposure can be varied to obtain the uniform and effective exposure.