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:
Oct. 15, 2024
Filed:
Dec. 11, 2019
Applicant:
Archem Inc., Tokyo, JP;
Inventors:
Kaori Okumoto, Tokyo, JP;
Makoto Otsuru, Tokyo, JP;
Assignee:
Archem Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 15/02 (2006.01); F16C 13/00 (2006.01);
U.S. Cl.
CPC ...
G03G 15/0233 (2013.01); F16C 13/00 (2013.01);
Abstract
Provided is a charging roller that can achieve excellent image quality and prevent detachment of particles in its surface layer. A charging rollercomprises a shaftand, on an outer circumferential side of the shaft, at least a base layerand a surface layer, wherein the surface layercontains a binder resinand particles, and the particlescontain 50 mass % or more of a same component A as at least one selected from components constituting the binder resin, and a content of the particles in the surface layer is 30 parts to 120 parts by mass with respect to 100 parts by mass of the binder resin.