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. 01, 2008
Filed:
Sep. 13, 2004
Takaaki Ikegami, Shizuoka, JP;
Shinji Nohsho, Shizuoka, JP;
Eiji Kurimoto, Shizuoka, JP;
Hidetoshi Kami, Shizuoka, JP;
Akihiro Sugino, Shizuoka, JP;
Yasuyuki Yamashita, Shizuoka, JP;
Hideo Nakamori, Shizuoka, JP;
Takeshi Takada, Kanagawa, JP;
Takaaki Ikegami, Shizuoka, JP;
Shinji Nohsho, Shizuoka, JP;
Eiji Kurimoto, Shizuoka, JP;
Hidetoshi Kami, Shizuoka, JP;
Akihiro Sugino, Shizuoka, JP;
Yasuyuki Yamashita, Shizuoka, JP;
Hideo Nakamori, Shizuoka, JP;
Takeshi Takada, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
The present invention relates to an electrophotographic photoconductor comprising a photoconductive layer, a protective layer, and a conductive support, wherein the protective layer is disposed as the outermost layer of the photoconductive layer, and 20% by volume to 60% by volume of fine particles of fluorine-contained resin and at least one compound selected from amine aromatic compounds and hydroxy aromatic compounds are incorporated into the protective layer. According to the present invention, high durability may be achieved, image degradation such as lags may be controlled from the increase of residual potential and decrease of charging, and high quality images may be formed stably even after the prolonged and repeated usage. The present invention also relates to an electrophotographic process, an electrophotographic apparatus and a process cartridge for the electrophotographic apparatus which utilize the electrophotographic photoconductor respectively.