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:
Sep. 07, 2021
Filed:
Dec. 13, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Taro Minobe, Ichikawa, JP;
Keizo Kojima, Yokohama, JP;
Naoki Kanno, Fujisawa, JP;
Atsushi Nakamoto, Tokyo, JP;
Toshihiko Takayama, Kawasaki, JP;
Hideo Nanataki, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A controller can select and execute a full color mode of performing image formation in a first state in which each primary transfer member is in contact with an intermediate transfer belt, and a monochrome mode of performing image formation in a second state in which only a primary transfer member is in contact with the intermediate transfer belt. The controller determines which state of the first state and the second state is formed, based on a detection result obtained by a current detection circuit when a photosensitive drum is charged by a charging roller, and voltage is applied to the primary transfer member from a primary transfer power source.