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:
Jul. 08, 2025
Filed:
Apr. 09, 2024
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventors:
Assignee:
CANON KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 15/02 (2006.01);
U.S. Cl.
CPC ...
G03G 15/0233 (2013.01); G03G 15/0225 (2013.01);
Abstract
A charging device has: a charging member that charges an image bearing member; and a cleaning member that is pressed against the charging member, and that is rubbed against a surface of the charging member by rotating the charging member. The cleaning member includes at least a first layer that contains roughening particles and that comes into contact with the charging member. The Martens hardness of the first layer is higher than that of the surface of the charging member. The roughening particles have a Mohs hardness similar to or higher than that of a component of highest Mohs hardness in toner adhered to the surface of the charging member.