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. 13, 2021
Filed:
Oct. 15, 2020
Canon Kabushiki Kaisha, Tokyo, JP;
Noriyoshi Umeda, Shizuoka, JP;
Tsuneyoshi Tominaga, Shizuoka, JP;
Shohei Tsuda, Shizuoka, JP;
Shohei Kototani, Shizuoka, JP;
Masahiro Kurachi, Shizuoka, JP;
Kazuhiro Yamauchi, Shizuoka, JP;
Hideo Kihara, Kanagawa, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An electrophotographic apparatus comprising an electrophotographic photosensitive member, a charging device, and a developing device, wherein the charging device comprises a conductive member arranged to be capable of contacting the electrophotographic photosensitive member, a conductive layer on the conductive member outer surface comprises a matrix and a plurality of domains dispersed in the matrix, at least some of the domains are exposed at the conductive member outer surface, the matrix has a volume resistivity of larger than 1.00×10Ω·cm and is 1.0×10times or more one of the domains, the developing device comprises the toner comprising a toner particle, fine particles A and B, the fine particle A has a volume resistivity of 1.0×10to 1.0×10Ω·cm, and the fine particle B is silica fine particle and having a volume resistivity of 1.0×10to 1.0×10Ω·cm.