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:
May. 28, 1996
Filed:
Dec. 17, 1993
Toshio Miyamoto, Yokohama, JP;
Akihiko Takeuchi, Yokohama, JP;
Katsuhiko Nishimura, Yokohama, JP;
Kazuaki Ono, Tokyo, JP;
Minoru Matsuguma, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A bias voltage including an AC voltage component is applied to a development sleeve. When the development sleeve opposes a non-image region of a photosensitive drum, a reference bias voltage including a constant current AC voltage component or a reference bias voltage including a constant voltage AC voltage component is applied to the development sleeve, and an AC voltage value or an AC current value applied to the development sleeve at that time is detected. An image formation factor is controlled on the basis of the detected AC voltage value or the detected AC current value.