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. 30, 2006
Filed:
Jun. 21, 2004
Tomohito Taniguchi, Shizuoka, JP;
Seiji Tsuru, Shizuoka, JP;
Noriaki Kuroda, Shizuoka, JP;
Hiroshi Inoue, Kanagawa, JP;
Toshihiro Otaka, Shizuoka, JP;
Tomohito Taniguchi, Shizuoka, JP;
Seiji Tsuru, Shizuoka, JP;
Noriaki Kuroda, Shizuoka, JP;
Hiroshi Inoue, Kanagawa, JP;
Toshihiro Otaka, Shizuoka, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In a charging member having a support and one or more cover layer(s), the ten-point average surface roughness of the surface of the charging member, the height of a hill of the surface of the charging member, the area at the part of the hill, and the area of a region surrounded by hills each having the height H (μm) and other hills each having a height of not less than the height H (μm), and not including any hills having a height of more than 0.5H (μm) satisfy a specific relationship. Also, a surface layer of the charging member contains high-molecular compound particles whose average particle diameter is between 2 and 50 μm and whose range of particle size distribution of average particle diameter is above 0μm and not greater than 7 μm.