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:
Jun. 09, 2009
Filed:
Apr. 12, 2006
Akihisa Yamada, Ushiku, JP;
Masayuki Hashimoto, Kashiwa, JP;
Norihiro Harada, Moriya, JP;
Mihoko Hyuga, Ushiku, JP;
Akihisa Yamada, Ushiku, JP;
Masayuki Hashimoto, Kashiwa, JP;
Norihiro Harada, Moriya, JP;
Mihoko Hyuga, Ushiku, JP;
Canon Kasei Kabushiki Kaisha, Ibaraki-ken, JP;
Abstract
An electroconductive rubber roller constituted of an electroconductive metal core and an electroconductive crosslinked rubber layer including an epichlorohydrin-based rubber, wherein the epichlorohydrin-based rubber is at least one copolymer selected from the group consisting of an epichlorohydrin-ethylene oxide copolymer and an epichlorohydrin-ethylene oxide-allyl glycidyl ether ternary copolymer. The ethylene oxide unit in the epichlorohydrin-based rubber is in a content of 40 to 90 mol %, and, the electroconductive crosslinked rubber layer has a heat quantity (enthalpy: ΔH) 5 mJ/mg or less as measured by a differential scanning calorimetry (DSC) and indicated by a peak appearing within a range of −20 to 150° C.