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:
Jan. 19, 2021
Filed:
Mar. 27, 2020
Canon Kabushiki Kaisha, Tokyo, JP;
Ryo Sugiyama, Mishima, JP;
Yoshinobu Ogawa, Numazu, JP;
Masashi Uno, Mishima, JP;
Tomoya Uesugi, Susono, JP;
Kenta Matsunaga, Susono, JP;
Wataru Moriai, Suntou-gun, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A developing roller that suppresses contamination of the surface of a photosensitive member and also obtains a high-quality image. The developing roller includes an electro-conductive substrate, an electro-conductive elastic layer and a surface layer which are stacked in this order, wherein the surface layer has resin particles that are dispersed in a polyurethane matrix, an outer surface of the surface layer has a first protrusion originating in first resin particle and a second protrusion originating in second resin particle, wherein the first resin particle contains polyurethane, an elastic modulus Eof the first resin particle is 100 to 2000 MPa, an elastic modulus Eof the second resin particle is 2 to 50 MPa, a maximum height roughness Rz of the outer surface is 6 to 18 μm, and a peak vertex density Spd is 5.0×10to 5.0×10(1/mm).