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:
Mar. 22, 2005
Filed:
Dec. 02, 2002
Yuriko Shindoh, Yamatokoriyama, JP;
Hiroko Ishibashi, Ikoma, JP;
Kazushige Morita, Ikoma-gun, JP;
Yoshihide Shimoda, Nara, JP;
Yuriko Shindoh, Yamatokoriyama, JP;
Hiroko Ishibashi, Ikoma, JP;
Kazushige Morita, Ikoma-gun, JP;
Yoshihide Shimoda, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
An electrophotographic photoreceptor, in which the increase of VL is controlled below 15 V by controlling the content ratio M (ppm) of a charge transporting material CTMto a charge transporting material CTMwithin a specific range, wherein the ionization potential Ip(2) of the CTMis smaller than the ionization potential Ip(1) of the CTMin the constituent of the photosensitive layer, and thereby the electrophotographic photoreceptor has only a little reduction of image concentration. A method for producing an electrophotographic photoreceptor having ΔVL which is controlled below 15 V, wherein, in a case where the ionization potential of the charge transporting material used in the previous run of production is small, ΔVL can be set below 15 V by using, in the next production, a dip coating liquid, which comprises, as a constitutive material, a charge transporting material in which the difference between the ionization potential of the current material and that of the previous material is set below 0.25 eV.