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. 26, 2009
Filed:
Jun. 08, 2006
Shinichi Kamoshida, Nagano-ken, JP;
Atsunori Kitazawa, Nagano-ken, JP;
Tadahiro Mizutani, Nagano-ken, JP;
Katsumi Okamoto, Nagano-ken, JP;
Ken Ikuma, Nagano-ken, JP;
Shinichi Kamoshida, Nagano-ken, JP;
Atsunori Kitazawa, Nagano-ken, JP;
Tadahiro Mizutani, Nagano-ken, JP;
Katsumi Okamoto, Nagano-ken, JP;
Ken Ikuma, Nagano-ken, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A charging roller is provided. The charging roller is configured to face an image carrier at a predetermined charging gap and charge the image carrier in a non-contact state. A conductive shaft is provided with a pair of annular concave portions formed on an outer circumferential surface at both ends thereof. A conductive layer is formed on the outer circumference surface at a center portion of the conductive shaft defined between the pair of concave portions. An insulating layer is formed on the outer circumferential surface at outer portions of the conductive shaft from the pair of annular concave portions. A depth of the concave portions is larger than a thickness of the conductive layer.