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. 23, 2017
Filed:
Mar. 02, 2016
Sumitomo Rubber Industries, Ltd., Kobe-shi, Hyogo, JP;
Kazuo Futamata, Kobe, JP;
SUMITOMO RUBBER INDUSTRIES, LTD., Kobe-shi, JP;
Abstract
A semiconductive roller is provided, which is capable of uniformly electrically charging a surface of a photoreceptor body particularly when being used as a charging roller, substantially free from defective image formation due to adhesion and accumulation of external additives even if repeatedly performing a charging operation, and less liable to contaminate the photoreceptor body, and has a lower roller resistance to make it possible to form higher-definition images at a higher process speed. The semiconductive roller () is formed from a semiconductive rubber composition which contains a rubber component including 15 to 80 mass % of an epichlorohydrin rubber, 5 to 50 parts by mass of titanium oxide based on 100 parts by mass of the rubber component, and a potassium salt as an electrically conductive agent. The semiconductive roller () has an oxide film () provided in an outer peripheral surface () thereof.