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. 23, 1993
Filed:
Feb. 19, 1991
Akihiko Takeuchi, Yokohama, JP;
Akihisa Kusano, Kawasaki, JP;
Junichi Kimizuka, Yokohama, JP;
Kaoru Sato, Yokohama, JP;
Toshiyuki Itoh, Sagamihara, JP;
Masanori Ishizu, Tokyo, JP;
Toshihiko Inuyama, Fujisawa, JP;
Kazuhiko Okazawa, Kawasaki, JP;
Tatsuto Tachibana, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus includes an image forming device for forming an image on a recording material, the image forming device including an image bearing member, a movable charging member for charging the image bearing member and a power source for supplying electric power to the charging member; a constant current controller for supplying the charging member with a predetermined constant level of electric current; and a second controller for controlling an image forming condition by the image forming device on the basis of plural voltage provided at different points of time during a constant current control operation with the same constant current level by the constant current controller.