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:
Oct. 16, 2007
Filed:
Sep. 13, 2005
Hirobumi Takahashi, Ushiku, JP;
Tomoya Kawakami, Ushiku, JP;
Ayumi Okuda, Moriya, JP;
Hiroshi Abe, Ushiku, JP;
Hirobumi Takahashi, Ushiku, JP;
Tomoya Kawakami, Ushiku, JP;
Ayumi Okuda, Moriya, JP;
Hiroshi Abe, Ushiku, JP;
Canon Kasei Kabushiki Kaisha, Tsukuba, JP;
Abstract
A contact charging roller includes a support member and a conductive coating member. The conductive coating member is composed of a seamless tube that contains at least (1) a non-polar resin or a styrene-type thermoplastic elastomer excluding a poly(styrene-hydrogentaged butadiene-styrene) block terpolymer and (2) a polar resin or an elastomer having a polar functional group containing at least nitrogen or oxygen, and contains carbon black in an amount of 10% to 60% by mass with respect to the total mass of the non-polar resin or elastomer and the polar resin or elastomer.