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:
Jul. 07, 2015
Filed:
Jun. 12, 2012
Applicants:
Kenichi Kuroda, Kobe, JP;
Akihiko Kawatani, Kobe, JP;
Yoshihisa Mizumoto, Kobe, JP;
Inventors:
Assignee:
SUMITOMO RUBBER INDUSTRIES, LTD., Kobe-shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 15/08 (2006.01); G03G 13/20 (2006.01);
U.S. Cl.
CPC ...
G03G 15/0818 (2013.01); G03G 13/20 (2013.01); G03G 2215/0861 (2013.01);
Abstract
An inventive developing roller is adapted for use in an electrophotographic image forming apparatus. The developing roller includes a roller body. At least an outer peripheral surface of the roller body is formed from a rubber composition containing a base rubber. The base rubber contains a styrene butadiene rubber in a proportion of not less than 10 mass % and not greater than 70 mass % based on the overall amount of the base rubber. The outer peripheral surface of the rubber body has a surface roughness Ra of not less than 0.78 μm and not greater than 1.8 μm.