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. 11, 2021
Filed:
Nov. 11, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Shinichi Agata, Suntou-gun, JP;
Shinichi Hagiwara, Tokyo, JP;
Yoshihiro Mitsui, Numazu, JP;
Kosuke Ikada, Machida, JP;
Kentaro Yamawaki, Mishima, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A charging memberthat charges an image bearing memberhas an electrically conductive support and an elastic layer in contact with the image bearing member. The elastic layer includes a semi-conductive rubber composition having a matrix-domain structure including a matrix and domains having electric conductivity. The matrix has a higher volume resistivity than the domain. The developer includes a toner having toner particles. The toner particles each have a surface layer including an organosilicon polymer. The organosilicon polymer has a structure represented by R—SiO(R is a hydrocarbon group having at least 1 and not more than 6 carbon atoms). The adhesion ratio of the organosilicon polymer on the surface of the toner particle is 90% or more.