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:
Jul. 07, 2009
Filed:
Jun. 28, 2007
Takashi Anezaki, Hiratsuka, JP;
Harunobu Ogaki, Suntoh-gun, JP;
Hiroki Uematsu, Suntoh-gun, JP;
Masataka Kawahara, Mishima, JP;
Atsushi Ochi, Numazu, JP;
Kyoichi Teramoto, Abiko, JP;
Akira Shimada, Suntoh-gun, JP;
Akio Maruyama, Tokyo, JP;
Toshihiro Kikuchi, Yokohama, JP;
Akio Koganei, Ichikawa, JP;
Takayuki Sumida, Kawasaki, JP;
Hirotoshi Uesugi, Numazu, JP;
Takashi Anezaki, Hiratsuka, JP;
Harunobu Ogaki, Suntoh-gun, JP;
Hiroki Uematsu, Suntoh-gun, JP;
Masataka Kawahara, Mishima, JP;
Atsushi Ochi, Numazu, JP;
Kyoichi Teramoto, Abiko, JP;
Akira Shimada, Suntoh-gun, JP;
Akio Maruyama, Tokyo, JP;
Toshihiro Kikuchi, Yokohama, JP;
Akio Koganei, Ichikawa, JP;
Takayuki Sumida, Kawasaki, JP;
Hirotoshi Uesugi, Numazu, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An electrophotographic photosensitive member has a surface having a plurality of depressed portions, having a major-axis diameter Rpc of 0.1 to 10 μm, a minor-axis diameter Lpc of 0.1 to 10 μm and a deepest-part to opening distance Rdv of 0.1 to 10 μm. Where the surface is equally divided into 4 regions in the rotational direction, which are then equally divided into 25 regions in the direction falling at right angles with the rotational direction, to obtain 100-spot regions A in total, and, in each thereof, square regions B of 50 μm each per side one side of which is parallel to the rotational direction are provided and the regions B are each equally divided into 500 zones by straight lines parallel to the rotational direction, 400 to 499 lines among the straight lines pass through the depressed portions in each of the regions B.