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:
Oct. 25, 1983
Filed:
Apr. 21, 1980
Shigehiro Komori, Yokohama, JP;
Hiroshi Ogawa, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An electrophotographic apparatus capable of copying an original selectively at different magnifications includes a movable electrophotographic photosensitive member, an electrostatic discharge device for imparting discharge to the photosensitive member to render it into a potential condition capable of forming an electrostatic latent image, a scanning mechanism for scanning the original, an optical system for forming an optical image of the scanned original on the photosensitive member at a selected magnification to form an electrostatic latent image, a device for changing the velocity of movement of the photosensitive member in correspondence with the selected magnification, and control circuit for varying the quantity of discharge per unit time of the discharge member to the photosensitive member in correspondence with the selected magnification.