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:
Aug. 07, 2012
Filed:
Jun. 18, 2008
Kenichi Tsuchiya, Komaki, JP;
Naoaki Sasakibara, Komaki, JP;
Fumio Misumi, Komaki, JP;
Satoshi Suzuki, Inuyama, JP;
Kadai Takeyama, Komaki, JP;
Kenichi Tsuchiya, Komaki, JP;
Naoaki Sasakibara, Komaki, JP;
Fumio Misumi, Komaki, JP;
Satoshi Suzuki, Inuyama, JP;
Kadai Takeyama, Komaki, JP;
Tokai Rubber Industries, Ltd., Komaki-Shi, JP;
Abstract
A charging roll includes a shaft and an ionically conductive elastic layer formed around the shaft. The ionically conductive elastic layer is formed of a rubber composition free of any electron-conductive agent and containing 0.7 to 1.0 parts by weight of a peroxide cross-linking agent per 100 parts by weight of an ion-conductive rubber. The ion-conductive rubber is formed of at least one of an epichlorohydrin rubber and a nitrile rubber, and a percentage of a rubber component in the ionically conductive elastic layer measured by thermogravimetric analysis is 90% or more by weight.