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:
Mar. 03, 1987
Filed:
Dec. 23, 1983
Applicant:
Inventors:
Mitsuaki Kohyama, Tokyo, JP;
Haruhiko Ishida, Tokyo, JP;
Toshihiro Kasai, Yokohama, JP;
Shigenobu Osawa, Kawasaki, JP;
Assignee:
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355-4 ; 355 / ; 430 42 ;
Abstract
An electrophotographic method according to the present invention forms a color image on a photosensitive drum by repeating a cycle of charging, exposure and development for a plurality of times. The electrophotographic method comprises a step of applying a corona discharge component superposed with an AC voltage shifted to the negative or positive polarity which corresponds to that of the photosensitive drum to the photosensitive drum prior to the second image exposure so as to recharge the photosensitive drum.