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. 24, 2022
Filed:
Oct. 14, 2020
Canon Kabushiki Kaisha, Tokyo, JP;
Kaname Watariguchi, Kanagawa, JP;
Kohei Makisumi, Shizuoka, JP;
Fumiyuki Hiyama, Shizuoka, JP;
Yuichi Kikuchi, Shizuoka, JP;
Kazuhiro Yamauchi, Shizuoka, JP;
Hirotaka Araki, Yokohama, JP;
Seiichi Miyazawa, Zama, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
The process cartridge includes an electrophotographic photosensitive member having a first support and a photosensitive layer; and a charging member. In the photosensitive member when an electric current is measured which flows when a voltage is applied to a surface while being varied, a gradient aof a low electric field region and a gradient aof a high electric field region satisfy a/a≥1.50, in a graph. The charging member includes a second support having an electroconductive outer surface, and a second electroconductive layer including a matrix and a plurality of domains being dispersed in the matrix, at least a portion of the domain is exposed to an outer surface which includes at least the matrix and at least a portion of the domain, and a volume resistivity ρof the matrix is 1.00×10times or higher of a volume resistivity ρof the domain.