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| Number | Title | Issue Date |
| 8178266 | Electrophotographic photoreceptor, image forming apparatus using the electrophotographic photoreceptor, and method of producing electrophotographic photoreceptor An electrophotographic photoreceptor is provided that contains a conductive substrate, an undercoat layer, a charge generation layer, and a charge transport layer, wherein the under coat layer contains a binder resin and multiple inorganic pigments each having diffe... | 05/15/2012 |
| 7964327 | Electrophotographic photoreceptor and method of preparing the photoreceptor, and image forming apparatus, image forming method and process cartridge using the photoreceptor An electrophotographic photoreceptor, including an electroconductive substrate; and a photosensitive layer, located overlying the electroconductive substrate, wherein an outermost layer of the electrophotographic photoreceptor includes an amine compound and a charge... | 06/21/2011 |
| 7803507 | Electrophotographic photoreceptor and image forming apparatus including the same An electrophotographic photoreceptor of high durability capable of providing stable excellent electrical characteristics over a prolonged period of time, which electrophotographic photoreceptor excels in mechanical strength. A photosensitive layer (14) of an ... | 09/28/2010 |
| 7754403 | Electrophotoconductor and image forming apparatus An organic photoconductive material which is useful as a raw material compound for a variety of functional materials and makes it possible to implement an electrophotoconductor which is excellent in terms of the charge transporting performance, excellent in terms of... | 07/13/2010 |
| 7709170 | Latent electrostatic image bearing member, and process cartridge, image forming apparatus and image forming method A latent electrostatic image bearing member including at least a support, a photoconductive layer on the support and a surface layer on the photoconductive layer, wherein a film having the same composition as the surface layer is formed on a slide glass such that th... | 05/04/2010 |
| 7704655 | Electrophotographic photoreceptor and electrophotographic apparatus 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... | 04/27/2010 |
| 7638248 | Electrophotographic photoconductor An electrophotographic photoconductor containing a conductive substrate and at least a charge generating layer and a charge transporting layer successively layered on the substrate, wherein the charge transporting layer contains a charge transporting material (M) an... | 12/29/2009 |
| 7629096 | Electrophotographic photoreceptor with an undercoat layer containing a polyimide resin and electrophotographic apparatus with the photoreceptor An electrophotographic photoreceptor that without detriment to excellent electrophotographic performance, realizes coating of any defects on a conductive substrate and excels in repetition stability and environmental performance. There is provided an electrophotogra... | 12/08/2009 |
| 7625681 | Asymmetric bis-hydroxyenamine compound, electrophotographic photoreceptor and image forming apparatus There is provided an organic photoconductive material that can realize an electrophotographic photoreceptor which is not only excellent in charge transporting ability but also excellent in solubility in a solvent and compatibility with a resin and moreover, which is... | 12/01/2009 |
| 7622232 | Electrophotographic photoreceptor and electrophotographic imaging apparatus employing the photoreceptor An electrophotographic photoreceptor including a photosensitive layer which includes a titanyl phthalocyanine crystal having a major absorption peak at a wavelength of 780 nm±10 nm and a minor absorption peak having an intensity of ¾ or less of the major absorptio... | 11/24/2009 |
| 7615326 | Electrophotographic photoconductor and image forming apparatus A charge transporting substance having three stilbene structures or butadiene structures in a molecule, represented by the following general formula is used as an organic photoconductive material. An electrophotographic photoconductor is prepared by causing a photos... | 11/10/2009 |
| 7598010 | Triarylamine dimer derivative having amorphous phase A triarylamine dimer derivative is represented by the following chemical formula [1] (in the chemical formula [1]: —Ar1, —Ar2, —Ar3 and —Ar4 are a... | 10/06/2009 |
| 7588871 | Electrophotographic photoreceptor and image forming apparatus provided with the same An electrophotographic photoreceptor having excellent electric characteristics such as sensitivity characteristic and light responsiveness with an excellent life duration of abrasion resistance so that no flaw and density unevenness are generated on to-be-formed ima... | 09/15/2009 |
| 7563548 | Amine compound, manufacturing method thereof, electrophotographic photoreceptor using amine compound and image forming apparatus having the same An amine compound represented by the general formula (1), which is incorporated as a charge-transporting substance to a charge-transporting layer of an electrophotographic photoreceptor: (in which Ar1, Ar2 | 07/21/2009 |
| 7449269 | Electrophotographic photoreceptor having defined mobility of electric charges in photosensitive layer and image forming device incorporating same The invention provides an electrophotographic photoreceptor capable of producing high quality images even when development is carried out under low electric potential conditions, and also provides an image forming device incorporating such an electrophotographic pho... | 11/11/2008 |
| 7432028 | Polymeric charge transport compositions This invention relates to a novel organophotoreceptor that includes: (a) a charge transport composition comprising molecules having the formula ... | 10/07/2008 |
| 7429439 | Electrophotographic photoreceptor and image forming apparatus provided with the same An electrophotographic photoreceptor of excellent durability having high sensitivity and light responsiveness, not suffering from lowering of the electric characteristics by exposure to light, change of circumstance, or repetitive use, and excellent in the cleaning ... | 09/30/2008 |
| 7416824 | Organic photoconductive material electrophotographic photoreceptor and image forming apparatus using the same According to the present invention, an enamine compound having a specific structure is used as an organic photoconductive material. This enamine compound is obtained based on asymmetrical secondary naphtylamine which is readily available at a lowest price, by introd... | 08/26/2008 |
| 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 |
| 7381511 | Photoreceptor, image forming method and image forming apparatus using the photoreceptor, process cartridge using the photoreceptor and coating liquid for the photoreceptor A photoreceptor including an electroconductive substrate; a photosensitive layer; and optionally a protective layer, wherein an outermost layer thereof includes a filler, an organic compound having an acid value of from 10 to 700 mg KOH/g and at least one compound s... | 06/03/2008 |
| 7378204 | Photoconductive member A photoconductive imaging member containing a photogenerating layer, and a charge transport layer, and wherein the charge transport layer is comprised of an arylamine containing a moiety that minimizes oxidation. ... | 05/27/2008 |
| 7314693 | Electrophotographic photoconductor, electrophotographic process, electrophotographic apparatus, and process cartridge 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 t... | 01/01/2008 |
| 7241543 | Image forming method, a photoreceptor used for the apparatus, and an image forming unit An electrophotographic image forming method is disclosed in which toner has a number ratio of toner particles having a shape coefficient of 1.2 to 1.6 being at least 65 percent, a variation coefficient of the shape coefficient of 4 to 16%, and a number variation coe... | 07/10/2007 |
| 7238457 | Electrophotographic photoreceptor An electrophotographic photoreceptor comprising a support, an interlayer containing inorganic particle and a photosensitive layer is disclosed. The photosensitive layer contains a mixture of compounds represented by Formula (1) having different n and (Rp+Rs) is not ... | 07/03/2007 |
| 7214457 | Organic photoconductor, process cartridge, image forming apparatus and image forming method An organic photoconductor including a charge generating layer and a charge transport layer on a conductive base, wherein crossing angleθ of two tangent lines is 70° or more, two tangent lines which border on a curve drawn by plotting integrated values of detected ... | 05/08/2007 |
| 7175954 | Electrophotographic photoreceptor An electrophotographic photoreceptor comprising a support and a photosensitive layer is disclosed. The photosensitive layer contains a mixture of compounds represented by Formula (1) having different n and (Rp+Rs) is not more than 99%, wherein Rp is a ratio of a com... | 02/13/2007 |
| 7125633 | Imaging member having a dual charge transport layer An imaging member having a charge transport layer with multiple regions or layers is provided. The charge transport layer includes at least two charge transport layers coated from solutions of different components and concentrations, wherein the second (top) transpo... | 10/24/2006 |
| 7118787 | Liquid crystal alignment layer There is provided a liquid crystal alignment layer comprising an alignment layer; and chemically bound to said alignment layer, a transport material. Also provided are methods for forming the liquid crystal alignment layer and the use thereof in displays for electro... | 10/10/2006 |
| 7115345 | Electrophotographic imaging members According to the present invention is an electrophotographic imaging member which is a thin dual layer structure comprising a top layer of a durable and wear-resistant layer and a bottom layer which is bipolar. The electrophotographic imaging member of the invention... | 10/03/2006 |
| 7115346 | Multi-layered electrophotographic positively charged organic photoconductor and manufacturing method thereof A multi-layered electrophotographic positively charged organic photoconductor includes a conductive substrate, a charge transport layer formed on the conductive substrate, and a charge generating layer formed on the charge transport layer. A composition to form the ... | 10/03/2006 |
| 7090952 | Electrophotosensitive material The present invention provides an electrophotosensitive material comprising a conductive substrate and a photosensitive layer provided on the conductive substrate, wherein the photosensitive layer contains a polyarylate having a repeating unit represented by the gen... | 08/15/2006 |
| 7045264 | Single layered electrophotographic photoreceptor A single layered electrophotographic photoreceptor includes a photosensitive layer having at least a charge generating material, a hole transporting material, an electron transporting material, and a binder on a conductive support. The photosensitive layer includes ... | 05/16/2006 |
| 7037631 | Photoconductive imaging members A photoconductive imaging member including a supporting substrate, a hole blocking layer thereover, a crosslinked photogenerating layer and a charge transport layer, and wherein the photogenerating layer includes a photogenerating component and a vinyl chloride, all... | 05/02/2006 |
| 6919155 | Organic photoreceptor and image forming method An electrophotographic photoreceptor is disclosed. The charge transport material comprising a mixture of stereoisomers as a charge transport material and glass transition point Tgb of the binder resin of the charge transport layer and glass transition point Tg1 of t... | 07/19/2005 |
| 6869740 | Electrophotographic photoreceptor and production method thereof 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 CTM2 to a charge transporting material CTM1 within a specific range, wherein the ioniz... | 03/22/2005 |
| 6824939 | Electrophotographic image forming method and apparatus An image forming apparatus including a photoreceptor which includes an electroconductive substrate, a photosensitive layer including a charge generation material and a charge transport material and located overlying the electroconductive substrate, and a protective ... | 11/30/2004 |
| 6521386 | Electrophotographic photoreceptor and electrophotographic image forming method and apparatus using the photoreceptor An electrophotographic photoreceptor including an electroconductive substrate and a photoreceptive layer, which is formed overlying the substrate, wherein the photoreceptive layer includes a charge carrier generation layer including a charge carrier gener... | 02/18/2003 |
| 6228547 | Bis(3,4-methylenedioxyphenylamino) derivatives and electrophotographic photoreceptor containing the derivatives Disclosed are novel compounds useful in electrophotographic photoreceptors as charge-transporting materials having good miscibility with binder polymers and capable of forming a thin stable organic film having a high concentration; and an electrophotograp... | 05/08/2001 |
| 6210847 | Crystalline oxotitanylphthalocyanine and electrophotographic photoreceptor using the same An object of the invention is to improve the photosensitivity characteristics, characteristics on repeated use and stability of a photoreceptor. A photosensitive layer formed on a conductive support of a photoreceptor contains crystalline oxotitanylphthal... | 04/03/2001 |
| 6180303 | Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus, and process for producing the same photosensitive member An electrophotographic photosensitive member, process cartridge and electrophotographic apparatus which use the same photosensitive member, and process for producing the same photosensitive member. The electrophotographic photosensitive member, includes a... | 01/30/2001 |
