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:
Feb. 11, 2020
Filed:
Apr. 02, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Takumi Furukawa, Susono, JP;
Hiroaki Watanabe, Odawara, JP;
Kenya Terada, Suntou-gun, JP;
Yuya Tomomizu, Yokohama, JP;
Toshimitsu Nakazawa, Isehara, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A charging member including an electro-conductive support; and an elastic layer, the elastic layer is a surface layer thereof and is constituted by a mono layer, the elastic layer includes domains and a matrix, an outer surface of the charging member is constituted by a surface of the matrix and surfaces of the domains, and the charging member has concave portions on the outer surface, the domains exist at bottom portions of the respective concave portions and are exposed to the outer surface of the charging member only at the bottom portions of the respective concave portions, the elastic layer has a volume resistivity of 1×10Ωcm or more and 1×10Ωcm or less, and Ais 20 times or more of A, wherein Aand Aare current values obtained by a prescribed method.