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| Number | Title | Issue Date |
| 8088541 | Polyvinyl acetal resin, electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus The present invention relates to a polyvinyl acetal resin having a specific repeating structural unit, an electrophotographic photosensitive member using the polyvinyl acetal resin, and a process cartridge and an electrophotographic apparatus each having the electro... | 01/03/2012 |
| 7442479 | Electrophotographic photoreceptor, and image forming apparatus and process cartridge using the electrophotographic photoreceptor A photoreceptor including at least an electroconductive substrate, and a charge blocking layer, a moiré preventing layer, and a photosensitive layer, which are located overlying the electroconductive substrate in this order, wherein the photosensitive layer include... | 10/28/2008 |
| 7403735 | Image formation apparatus using an electrophotographic process An image formation apparatus using an elecrophotographic process for obtaining a high quality image with tone value R2 of equal to or more than 0.98 is provided. The resolution for light-writing is equal to or more than 1200 dpi and/or light-writing is pe... | 07/22/2008 |
| 7371491 | Electrophotographic photoreceptor, method for manufacturing the electrophotographic photoreceptor, and image forming apparatus and process cartridge using the electrophotographic photoreceptor A photoreceptor including an electroconductive substrate; and a charge blocking layer; a moiré preventing layer; and a photosensitive layer, which are overlaid overlying the substrate in this order, wherein the photosensitive layer includes a titanyl phthalocyanine... | 05/13/2008 |
| 7341810 | Electrophotographic photoreceptor method of manufacturing electrophotographic photoreceptor, and electrophotographic apparatus and process cartridge using electrophotographic photoreceptor An electrophotographic photoreceptor comprising a conductive substrate, an undercoat layer located overlying the conductive substrate, a photosensitive layer located overlying the undercoat layer. The photosensitive layer has a charge generation layer located overly... | 03/11/2008 |
| 7333752 | Electrophotographic photosensitive member, and process cartridge and electrophotographic apparatus which have the electrophotographic photosensitive member An electrophotographic apparatus is disclosed using an electrophotographic photosensitive member which employs light with a short wavelength (380 nm to 500 nm) as image exposure light and is good in photoelectric conversion efficiency on the whole at that wavelength... | 02/19/2008 |
| 7289751 | High resolution image forming apparatus An image forming apparatus includes a photosensitive body (11) having a charge transport layer (11d) as a surface layer. The charge transport layer (11d) as the surface layer is charged and exposed so that a latent image is formed ... | 10/30/2007 |
| 7276318 | Electrophotographic photosensitive member, and electrophotographic apparatus and process cartridge which make use of the same This invention relates to an electrophotographic photosensitive member having a support and a photosensitive layer. In the electrophotographic photosensitive member having a support and a photosensitive layer, which electrophotographic photosensitive member m... | 10/02/2007 |
| 7192677 | Electrophotographic photoconductor An electrophotographic photoconductor including an electroconductive support and a photoconductive layer formed thereon, which contains a phthalocyanine pigment and a disazo pigment of formula (I): wherein A and ... | 03/20/2007 |
| 7181156 | Image forming apparatus using a cleaning member for preventing noises and process cartridge therefor An image forming apparatus includes a photoconductor, a cleaning blade for cleaning the photoconductor, and a blade holder holding the cleaning blade and having a first bent portion for increasing its rigidity. In the apparatus, blade holder has at least one of a pr... | 02/20/2007 |
| 7135261 | Multi-layered organic electrophotographic photoconductor A multi-layered organic electrophotographic photoconductor exhibits superior stability in mass production and excellent adhesion ability with two layers contacting the charge generation layer and is free of contamination of the coating liquid for a charge transport ... | 11/14/2006 |
| 7129012 | Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus An electrophotographic photosensitive member which has VA, VB, and d satisfying an expression (|−600−VA|−|−600−VB|)/d=0.13 and VC satisfying an expression −5=−(−450−VC)=2 provides an... | 10/31/2006 |
| 6960417 | Electrophotographic photoconductor An electrophotographic photoconductor including an electroconductive support and a photoconductive layer formed thereon, which contains a phthalocyanine pigment and a disazo pigment of formula (I): wherein A and B are ... | 11/01/2005 |
| 6946225 | Electrophotographic element protected from photofatigue induced by visible light A multi-active electrophotographic charge generation element comprises a conductive support, a charge generation layer (CGL) disposed on the conductive support, and a charge transport layer (CTL) disposed on the charge generation layer. The charge generation layer (... | 09/20/2005 |
| 6777149 | Electrophotographic image forming apparatus and process cartridge, and electrophotographic photoreceptor therefor An image forming apparatus including at least an image irradiator configured to irradiate a photoreceptor with a coherent light beam while scanning to form pixel light spots thereon for forming an electrostatic latent image thereon, wherein the light spots overlap w... | 08/17/2004 |
| 6773856 | Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus An electrophotographic photosensitive member has a support and a photosensitive layer provided thereon. The photosensitive layer contains a carixarene compound having specific structure. Also disclosed are a process cartridge and an electrophotographic apparatus whi... | 08/10/2004 |
| 6656652 | Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus An electrophotographic photosensitive member includes a support, and a charge generation layer and a charge transport layer provided on the support in this order. The charge generation layer contains a charge-generating material in an amount of more than ... | 12/02/2003 |
| 6136483 | Electrophotographic photoconductor and electrophotographic image forming apparatus using the photoconductor An electrophotographic photoconductor including an electroconductive substrate, and a charge generating layer including a charge generating material and a charge transporting layer including a charge transporting material, which are overlaid and which are... | 10/24/2000 |
| 6132914 | Bisazo compound and electrophotographic photoconductor using the same An electrophotographic photoconductor has an electroconductive support, and a photoconductive layer formed thereon which contains at least one bisazo compound of formula (I): ##STR1## wherein Cp1 and Cp2 are each a coupler radic... | 10/17/2000 |
| 6132911 | Method for manufacturing pigment, electrophotographic photoconductor using the pigment and electrophotographic image forming method and apparatus using the photoconductor A method of manufacturing an organic pigment including the steps of providing an organic pigment wet cake which includes at least an organic pigment and a solvent and drying the organic pigment wet cake while the wet cake is heated at a temperature higher... | 10/17/2000 |
| 6087055 | Electrophotographic photoconductor An electrophotographic photoconductor has an electroconductive support, and a photoconductive layer formed thereon containing an azo pigment of formula (1): ##STR1## wherein R201 and R202 are each a hydrogen atom, a halogen atom... | 07/11/2000 |
| 6005085 | Condensed azo compounds and process for preparing the same The present invention provides novel condensed azo compounds using bisamide compounds of 2-hydroxynaphthalene-3,6-dicarboxylic acid, amide, or ester as the couplers, which have excellent properties such as excellent water resistance, chemical resistance, ... | 12/21/1999 |
| 5955229 | Electrophotographic photoreceptor An electrophotographic photoreceptor having a photosensitive layer on a conductive substrate is provided, in which a stilbene compound represented by the formula I! contained in the photosensitive layer to give the photoreceptor excellent sensitivity an... | 09/21/1999 |
| 5853930 | Electrophotographic photoconductors using bisazo compounds There is provided an electrophotographic photoconductor comprising as a charge carrier generating substance a bisazo compound of the general formula (I): ##STR1## wherein R1 and R2 are the same or different, each representing a ... | 12/29/1998 |
| 5837410 | Photoconductor for electrophotography A photoconductor for electrophotography includes a conductive substrate and an organic film comprised of one or more layers which contain one or more organic compounds. The water content of the organic film is regulated to be within 0.02 to 5.0 weight per... | 11/17/1998 |
| 5747203 | Electrophotographic photoreceptor having charge generating layer with specific polyester An electrophotographic photoreceptor comprising an electrically conductive support and at least a carrier generation layer and a carrier transport layer formed on the substrate, wherein said carrier generation layer contains a polyester resin having a rep... | 05/05/1998 |
| 5686212 | Photoconductor for electrophotography containing distyryl compound A photoconductor for electrophotography includes a distyryl compound of the general formula (I) as a charge generation material and a bisazo compound of the general formula (II) as a charge transport material. ##STR1##... | 11/11/1997 |
| 5656405 | Organic photoconductor for electrophotography An organic photoconductor for electrophotography that is light in weight, yields excellent images and is easily disposed of, which comprises a cylindrical conductive substrate that contains cross-linked polyphenylene sulfide as its main component, a block... | 08/12/1997 |
| 5607802 | Multilayered photoreceptor with dual underlayers for improved adhesion and reduced micro-defects An electrophotographic imaging member having an imaging surface adapted to accept a negative electrical charge, the electrophotographic imaging member having a two electrically conductive ground plane layers including a layer including zirconium over a la... | 03/04/1997 |
| 5595845 | Electrophotographic photosensitive member, electrophotographic apparatus including same and electrophotographic apparatus unit An electrophotographic photosensitive member is constituted by disposing charge generation layer and a charge transport layer in succession on a support. The charge generation layer contains oxytitanium phthalocyanine, an azo pigment and a hindered phenol... | 01/21/1997 |
| 5576131 | Electrophotographic photosensitive member, electrophotographic apparatus including same and electrophotographic apparatus unit An electrophotographic photosensitive member is constituted by disposing a photosensitive layer on a support. The photosensitive layer contains oxytitanium phthalocyanine and a specific disazo pigment of the formula (I) or (II) each characterized by havin... | 11/19/1996 |
| 5569749 | Organic photoconductive material and a photosensitive material for electronic photography using it An organic photoconductive material is represented by the following general formula [1]: A1 --N.dbd.N--B--N.dbd.N--A2 [1], wherein B is a divalent organic group bonded to nitrogen atoms forming azo groups, A1 | 10/29/1996 |
| 5543257 | Electrophotographic photosensitive member, process cartridge including same and electrophotographic apparatus An electrophotographic photosensitive member is constituted by an electroconductive support and a photosensitive layer disposed on the electroconductive support. The photosensitive layer contains a specific disazo pigment having a 2,2'-bis-1,3-benzdithiol... | 08/06/1996 |
| 5527653 | Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus which employ the same An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer thereon. The photosensitive layer contains a disazo pigment having a 1,2-benzofluorenone as a central structure. A process cartridge and an electrophot... | 06/18/1996 |
| 5521039 | Electrophotographic photosensitive material and printing plate for electrophotographic process An electrophotographic photosensitive material comprising a conductive support having thereon (a) a layer containing a charge transporting compound and a charge generating compound or (b) a combination of a layer containing a charge transporting compound ... | 05/28/1996 |
| 5518846 | Electrophotographic photoreceptor and electrophotographic printing plate precursor A novel electrophotographic photoreceptor is provided, comprising on an electrically conductive support a light-sensitive layer containing at least one acetylene disazo compound represented by the general formula (I): Cp--N.dbd.N--Ar1 --C.tbd.C... | 05/21/1996 |
| 5492784 | Positively-chargeable single-layered type electrophotographic photoconductor A positively-chargeable single-layered type organic electrophotographic photoconductor composed of an electroconductive support and an organic single-layered photoconductive layer containing a charge generating material, an organic positive hole transport... | 02/20/1996 |
| 5459247 | Bisazo compounds useful as charge generating materials Bisazo compounds useful as charge generating materials having formula (I) are disclosed: ##STR1## wherein R represents hydrogen, an alkyl group having 1 to 4 carbon atoms, an alkoxyl group having 1 to 4 carbon atoms or a nitro group.... | 10/17/1995 |
| 5432034 | Photoconductor for electrophotography including an undercoating layer An organic photosensitive member for electrophotography is provided which comprises a photosensitive layer 3 formed on an electroconductive substrate 1 via an undercoating layer 2, the photosensitive layer 3 comprising a charge generating layer 4 and a ch... | 07/11/1995 |
| 5411828 | Electrophotographic photosensitive member, and electrophotographic apparatus, device unit and facsimile machine having the photosensitive member An electrophotographic photosensitive member is disclosed which has a photosensitive layer on a conductive support. The photosensitive layer contains an azo pigment of Formula (1): Ar--(--N.dbd.N--Cp)n. Also, disclosed are an electrophotographic app... | 05/02/1995 |
