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:
Jan. 30, 2007
Filed:
Mar. 25, 2004
Applicants:
Hiroshi Abe, Ibaraki, JP;
Hirobumi Takahashi, Ibaraki, JP;
Inventors:
Hiroshi Abe, Ibaraki, JP;
Hirobumi Takahashi, Ibaraki, JP;
Assignee:
Canon Kasei Kabushiki Kaisha, Tsukuba, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G 15/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A charging roller for a contact charging assembly is provided including a conductive substrate, an elastic layer which covers the periphery of the conductive substrate, and a seamless tube externally so fitted as to cover the periphery of the elastic layer. The seamless tube constitutes a surface layer of the charging roller, and the charging roller has a surface of 3.0 μm or less in ten-point average roughness (Rz jis 94) and 0.10 mm or less in roughness curve average length (RSm).