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:
Aug. 13, 2002
Filed:
Nov. 22, 2000
Hirofumi Kawaguchi, Osaka, JP;
Yuji Tanaka, Yao, JP;
Yukikatsu Imanaka, Osaka, JP;
Nobuko Akiba, Osaka, JP;
Kyocera Mita Corporation, Osaka, JP;
Abstract
The present invention relates to a positive charging single-layer type electrophotosensitive material comprising a conductive substrate and a photosensitive layer formed on the conductive layer, the photosensitive layer containing a phthalocyanine compound as an electric charge generating material, wherein a large half-life exposure between a half-life exposure on positive charging and a half-life exposure on negative charging is four times or less as much as that of the other half-life exposure., and a reversal development type digital image forming apparatus, comprising the electrophotosensitive material, said reversal development type digital image forming apparatus being provided with at least a main charging step, an exposure step, a developing step, a transferring step, a charge neutralizing step and a cleaning step in the forward direction of the electrophotosensitive material, characterized in that the voltage to be applied in the transferring step has a polarity reverse to that of the voltage to be applied in the charging step.