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. 27, 2007
Filed:
Mar. 31, 2004
Kotaro Fukushima, Kawanishi, JP;
Hisayuki Utsumi, Nara, JP;
Yohichi Takesawa, Toyonaka, JP;
Shinya Mimura, Nara, JP;
Tatsuhiro Morita, Kashiba, JP;
Katsuya Takano, Yamatokoriyama, JP;
Kotaro Fukushima, Kawanishi, JP;
Hisayuki Utsumi, Nara, JP;
Yohichi Takesawa, Toyonaka, JP;
Shinya Mimura, Nara, JP;
Tatsuhiro Morita, Kashiba, JP;
Katsuya Takano, Yamatokoriyama, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
An electrophotographic photoreceptor using a non-contact type charging process has a creep value Cof is 2.70% or more, preferably 3.00% or more, and a Vickers hardness (HV) at its surface of 20≦HV≦25 in a case where a maximum indenting load of 30 mN is loaded to the surface under a circumstance at a temperature of 25° C. and at a relative humidity of 50%. Since such an electrophotographic photoreceptor is excellent in flexibility and has plasticity not too soft nor exhibiting fragility, the amount of film reduction due to wear is decreased during long time use, excellent surface smoothness is ensured, and there is no occurrence of injury or unevenness in density to the formed images.