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1. US20090004585 - Electrophotographic photoreceptor and electrophotographic apparatus

Office
United States of America
Application Number 12182303
Application Date 30.07.2008
Publication Number 20090004585
Publication Date 01.01.2009
Grant Number 7704655
Grant Date 27.04.2010
Publication Kind B2
IPC
G03G 15/02
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
15Apparatus for electrographic processes using a charge pattern
02for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
CPC
G03G 5/0564
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
5Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
02Charge-receiving layers
04Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
05Organic bonding materials; Methods for coating a substrate with a photoconductive layer; Inert supplements for use in photoconductive layers
0528Macromolecular bonding materials
0557obtained otherwise than by reactions only involving carbon-to-carbon unsatured bonds
0564Polycarbonates
G03G 5/0614
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
5Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
02Charge-receiving layers
04Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
06characterised by the photoconductive material being organic
0601Acyclic or carbocyclic compounds
0612containing nitrogen
0614Amines
G03G 5/0696
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
5Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
02Charge-receiving layers
04Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
06characterised by the photoconductive material being organic
0664Dyes
0696Phthalocyanines
Applicants Yamanashi Electronics Co., Ltd.
Ricoh Company, Ltd.
Inventors Suzuki Hajime
Ueda Tsuyoshi
Koizumi Toshihiko
Nakamura Hideki
Sakuma Tetsuya
Agents Kratz, Quintos &; Hanson, LLP
Priority Data 2006022435 31.01.2006 JP
2006042292 20.02.2006 JP
Title
(EN) Electrophotographic photoreceptor and electrophotographic apparatus
Abstract
(EN)

An electrophotographic photoreceptor which can respond to a reduction in diameter of photoreceptor and a process having high circumferential speed, due to the demand in the miniaturization and increase in the speed of copiers and printers. The photoreceptor has high sensitivity in long-wavelength region, and is free from deterioration of electric characteristics even after repeated use, and is highly stable. The electrophotographic photoreceptor has a conductive support member and a photosensitive layer laminated thereon, which includes at least a charge-generating agent, a charge-transfer agent, and a binder resin. The charge-generating agent is oxytitanium phthalocyanine, which has a Bragg angle (2θ±0.2°) providing a maximum peak at 27.2° in the X-ray diffraction spectra using CuKα as a radiation source.