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:
Nov. 11, 2014
Filed:
Dec. 03, 2009
Yoshihisa Saito, Toride, JP;
Shoji Amamiya, Yokohama, JP;
Hideki Ogawa, Moriya, JP;
Tatsuya Ikezue, Toride, JP;
Kan Tanabe, Toride, JP;
Mayumi Oshiro, Abiko, JP;
Kumiko Takizawa, Saitama, JP;
Takahiro Mitsui, Kawasaki, JP;
Yoshihisa Saito, Toride, JP;
Shoji Amamiya, Yokohama, JP;
Hideki Ogawa, Moriya, JP;
Tatsuya Ikezue, Toride, JP;
Kan Tanabe, Toride, JP;
Mayumi Oshiro, Abiko, JP;
Kumiko Takizawa, Saitama, JP;
Takahiro Mitsui, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An electrophotographic apparatus and a process cartridge include an electrophotographic photosensitive member; a developing unit; and a cleaning unit, wherein depressed portions separated from each other and satisfying conditions below are formed in the surface of the electrophotographic photosensitive member at a density of 10 or more per unit area of 1 cm: a depth of the depressed portions is defined as Rdv[μm], a minor-axis diameter of the depressed portions is defined as Lpc[μm], a major-axis diameter of the depressed portions is defined as Rpc[μm], and an angle formed between a direction of a major-axis of each of the depressed portions and a direction of movement of the surface of the electrophotographic photosensitive member is defined as θ[°].5[°]≦θ[°]≦85[°]0.3×[μm]≦[μm]≦0.5×[μm]1.1×[μm]≦[μm]≦1.5×[μm]50/Sin θ[μm]≦[μm]≦1500[μm]