Entries |
Document | Title | Date |
20080199216 | Acoustic dampening material for imaging drum - Method for acoustic dampening of photoreceptor and ionographic drums using an acoustic dampening applied to and cured on the interior of a drum. Embodiments provide excellent acoustic dampening of the resonance modes, and thus, substantially eliminates the problematic sounds that are often emitted from the xerographic printing machines. | 08-21-2008 |
20080199217 | ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR, ELECTROPHOTOGRAPHIC PROCESS CARTRIDGE INCORPORATING THE SAME, AND IMAGE FORMING APPARATUS INCORPORATING THE SAME - An object is to provide an electrophotographic photoconductor which prevents an increase in the friction coefficient of the photoconductor surface caused when printing takes place for a long period of time or in large amounts, which has sustainability of the low photoconductor surface friction coefficient, low wear properties and high durability, and which is particularly superior in polymerized toner (or spherical toner) cleaning capability; a process cartridge incorporating the electrophotographic photoconductor; and an image forming apparatus incorporating the electrophotographic photoconductor. There is an electrophotographic photoconductor including: a photoconductor substrate, a photosensitive layer over the photoconductor substrate, and a protective layer over the photoconductor substrate, wherein the protective layer is formed by curing together at least a trifunctional or more radical polymerizable monomer having no charge transporting structure, a fluorine-based UV-curable hard coat agent and a monofunctional radical polymerizable compound having a charge transporting structure, and contains lubricant fine particles. | 08-21-2008 |
20080199218 | ELECTROPHOTOGRAPHIC PHOTORECEPTOR AND ELECTROPHOTOGRAPHIC IMAGE FORMING METHOD AND APPARATUS USING THE PHOTORECEPTOR - An electrophotographic photoreceptor including an electroconductive substrate, and a photosensitive layer formed overlying one side of the electroconductive substrate, wherein the photosensitive layer includes at least two charge generation materials which have spectral sensitivity in a different wavelength region, and wherein the photosensitive layer further includes an organic sulfur-containing compound. | 08-21-2008 |
20080232850 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus comprises charging means, etc. sequentially arranged around a periphery of an electrophotographic photoconductor, wherein, when a projection area of the charging means per time relative to the photosensitive layer surface of the electrophotographic photoconductor is set to be S (cm | 09-25-2008 |
20080232851 | Image developing apparatus and image forming apparatus using the apparatus - An image developing apparatus includes an upper case; a lower case disposed on a lower side of the upper case, and internally housing a developing agent, and having an opening. A photoconductive drum is disposed on the upper case for forming an electrostatic latent image on a surface thereof. A charging roller is disposed on one side of an outer circumference of the photoconductive drum for charging the photoconductive drum. A developing roller having one part is exposed through the opening of the lower case to cooperate with the photoconductive drum for developing the electrostatic latent image. A scattering preventing unit disposed between the photoconductive drum and the developing roller, to prevent scattering of the developing agent supplied by the developing roller. The scattering preventing unit includes a blocking curtain which covers a part of the opening and having one side in contact with the outer circumference of the photoconductive drum. A fixing bracket is provided for supporting the blocking curtain. | 09-25-2008 |
20080232852 | Image formation apparatus and photoreceptor cartridge - An image forming apparatus, includes: a mainframe; a photoreceptor; an exposing unit that exposes a surface of the photoreceptor to form an electrostatic latent image; and a developing unit that develops the electrostatic latent image by supplying a charged developer on the surface of the photoreceptor having the electrostatic latent image formed thereon. The photoreceptor is loadable in and unloadable from the mainframe separately from the developing unit. | 09-25-2008 |
20080247778 | CONDUCTIVE RUBBER MEMBER - An object of the present invention is to provide a conductive rubber member which exhibits small environmental dependency and stable electrical resistance. The conductive rubber member is formed of a conductive elastic layer which has been imparted with conductivity by means of a conductivity-imparting agent. The conductive elastic layer has, at a surface portion thereof, a surface-treated layer which has been formed through impregnating the surface with a surface-treatment liquid containing an isocyanate component and an ion-conducting polymer. | 10-09-2008 |
20080260427 | ELECTROPHOTOGRAPHIC PHOTORECEPTOR, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - An electrophotographic photoreceptor is provided that suppresses the occurrence of non-uniformity of in-plane image density caused by a superfluous residual potential and defects such as cracks in an organic photoreceptor having a protective layer made of an inorganic thin film, and that simultaneously exhibits high durability and good electrical properties, and a process cartridge and an image forming apparatus including the same are provided. | 10-23-2008 |
20080273897 | Electrophotographic photoreceptor, process cartridge and image forming apparatus - An electrophotographic photoreceptor includes a conductive support; a photosensitive layer; and a surface protective layer as an outermost layer of the electrophotographic photoreceptor, wherein the electrophotographic photoreceptor satisfies following formulas (a) and (b): | 11-06-2008 |
20080286008 | TITANYLPHTHALOCYANINE CRYSTAL AND METHOD OF PRODUCING THE TITANYLPHTHALOCYANINE CRYSTAL, AND ELECTROPHOTOGRAPHIC PHOTORECEPTOR, METHOD, APPARATUS AND PROCESS CARTRIDGE USING THE TITANYLPHTHALOCYANINE CRYSTAL - A titanylphthalocyanine crystal having an X-ray diffraction spectrum having plural diffraction peaks and a primary particle diameter not greater than 0.2 μm, wherein a maximum diffraction peak is observed at a Bragg (2 θ) angle of 27.2±0.2°; main peaks are observed at 9.4°, 9.6° and 24.0°; and a minimum diffraction peak is observed at 7.3°; and preferably no diffraction peak is observed at an angle greater than 7.3° and less than 9.4° when a specific X-ray of CuKα having a wavelength of 1.542 Å irradiates the titanylphthalocyanine crystal. | 11-20-2008 |
20080298840 | ELECTROPHOTOGRAPHIC PHOTORECEPTOR, IMAGE FORMING APPARATUS, AND PROCESS CARTRIDGE - An electrophotographic photoreceptor including a conductive substrate and a photosensitive layer located overlying the conductive substrate which includes a naphthalenetetracarboxylic acid diimide derivative having a specific formula; and an image forming apparatus and a process cartridge using the electrophotographic photoreceptor are provided. | 12-04-2008 |
20080304864 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - Provided is an electrophotographic photosensitive member in which friction memory does not easily occur, and a process cartridge and an electrophotographic apparatus which have the electrophotographic photosensitive member. The electrophotographic photosensitive member having a photosensitive layer has a surface layer having a plurality of depressed portions which are independent from one another, where the minor axis diameter of the depressed portions is Rpc and the depth indicating the distance between the innermost part of a depressed portion and the opening surface thereof is Rdv, the depressed portions have a ratio of depth to minor axis diameter (Rdv/Rpc) on a surface of the photosensitive member of 1.0 or less, and the photosensitive layer has a charge transporting material with an ionization potential of 4.5 eV or more and 5.3 eV or less. | 12-11-2008 |
20090028604 | IMAGE-FORMING APPARATUS WHICH CAN ELIMINATE STATIC ELECTRICITY - An image-forming apparatus includes an electrophotographic photoreceptor including a photosensitive layer, an exposure unit for irradiating the electrophotographic photoreceptor with light, a pressing member pressed against the photosensitive layer of the electrophotographic photoreceptor to remove a deposit from the photosensitive layer, and a static eliminating unit for eliminating the static electricity of the deposit to be removed by the pressing member. | 01-29-2009 |
20090035017 | ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR AND METHOD FOR PRODUCING THE SAME, IMAGE FORMING APPARATUS, AND PROCESS CARTRIDGE - There is provided an electrophotographic photoconductor containing a conductive substrate, and a photosensitive layer, disposed thereon, containing a charge transporting material having a triarylamine structure represented by General Formula 1, and wherein the photosensitive layer satisfies Mathematical Formula 1 when peak heights in raman scattering spectra of the triarylamine structure are measured at a wavenumber of 1,324±2 cm | 02-05-2009 |
20090041500 | IMAGE FORMING APPARATUS - To provide an image forming apparatus which is capable of suppressing soiling of image white parts, residual images (ghosts), fading, etc. due to non-uniformity in the particle size distribution of a toner or mismatching between a toner and a photoreceptor and which is able to improve image quality, provides good fixing properties and cleaning properties with little fogging or dot missing, presents good reproducibility of fine lines, and even when a high speed printing machine is used, can reduce a problem of e.g. soiling in a long-term use and presents excellent image stability. | 02-12-2009 |
20090052942 | Imaging member - The presently disclosed embodiments are directed to charge transport layers useful in electrostatography. More particularly, the embodiments pertain to an improved electrostatographic imaging member having a charge transport layer that is partially crosslinked, wherein the crosslinking is achieved by incorporating a small amount of compatible thermalsetting resins into the layer. Incorporation of these resins have been shown to increase charge transport life. | 02-26-2009 |
20090074460 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - An electrophotographic photosensitive member is provide which inhibits recovered toner from leaking out of the edge portion at the time of long-term use, and has good durability. Each of at least both edge portions of the surface layer of the electrophotographic photosensitive member has a region in which independent depressed portions are formed at a density of ten or more portions per 100 μm square. An average depth Rdv-A, an average short axis diameter Lpc-A, and an average long axis diameter Rpc-A, of the depressed portions are respectively in specific ranges. When an angle formed between the circumferential direction of the electrophotographic photosensitive member and the long axis of each of the depressed portions is represented by θ, the depressed portions are formed so that the angle θ satisfies the relationship of 90°<θ<180° toward the center of the electrophotographic photosensitive member. | 03-19-2009 |
20090110438 | PHOTOSENSITIVE BODY, IMAGE FORMING APPARATUS HAVING THE SAME AND ASSEMBLY METHOD OF PHOTOSENSITIVE BODY - A photosensitive body to stably maintain an electric connection between a photosensitive drum and a shaft includes a photosensitive drum, a shaft serving as a rotational center of the photosensitive drum, and a grounding device to electrically connect the photosensitive drum and the shaft. The grounding device includes a shaft connecting portion electrically connected to the shaft, and an anchor portion fixedly stuck in an inner peripheral surface of the photosensitive drum. The anchor portion moves from a first state, in which the anchor portion is extended in a longitudinal direction of the photosensitive drum, to a second state, in which the anchor portion is extended in a radial direction of the photosensitive drum, and is fixed to the photosensitive drum. | 04-30-2009 |
20090123180 | System and Method for Transferring Features to a Substrate - A method comprising generating a clear layer on a first surface using a transparent liquid toner, generating a color layer using a pigmented liquid toner over the clear layer on the first surface, and transferring the clear layer and the color layer from the first surface to a substrate is provided. | 05-14-2009 |
20090129816 | SELF ERASING PHOTORECEPTOR CONTAINING AN ELECTROLUMINESCENT NANOMATERIAL - In accordance with the invention, there are electrophotographic photoreceptors, image forming apparatus and methods of forming an image. The electrophotographic photoreceptor can comprise a conductive layer comprising a plurality of electroluminescent nanomaterials, a first contact electrically connected to a first edge of the conductive layer and an electrical ground, a second contact electrically connected to a second edge of the conductive layer and a D.C. power supply, and a photosensitive layer disposed over the conductive layer, wherein the photosensitive layer comprises a charge generation material and a charge transport material. The D.C. power supply can be configured to supply a lateral voltage bias at the second contact to generate a localized electroluminescence across the conductive layer and deliver an erase illumination from within the electrophotographic photoreceptor. | 05-21-2009 |
20090136260 | ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR AND ELECTROPHOTOGRAPHIC APPARATUS - An electrophotographic photoconductor including a conductive support and a photosensitive layer, wherein the photosensitive layer contains a charge generation agent, a charge transport agent and a binder resin, and wherein the charge generation agent contains an asymmetric disazo pigment represented by General Formula (I), the charge transport agent contains a triphenylamine compound represented General Formula (IX), and the mass ratio of the charge transport agent to the binder resin is 0.3 to 2.0, | 05-28-2009 |
20090148182 | IMAGE HOLDING MEMBER, IMAGE FORMING APPARATUS, AND CHARGING MEMBER FOR IMAGE FORMING APPARATUS - An image bearing member that holds an image according to one aspect of the invention contains noble metal nanoparticles dispersed in at least a surface of a resin layer of the image bearing member. | 06-11-2009 |
20090162097 | COATING LIQUID FOR UNDERCOATING LAYER FORMATION, AND ELECTROPHOTOGRAPHIC PHOTORECEPTOR HAVING UNDERCOATING LAYER FORMED BY COATING OF SAID COATING LIQUID - To provide a coating fluid for forming an undercoat layer having high stability, a high quality and long-life electrophotographic photoreceptor capable of forming a high quality image in various environments, with which image defects such as black spots or color spots hardly occur, an image forming apparatus using such a photoreceptor, and an electrophotographic cartridge using such a photoreceptor. | 06-25-2009 |
20090175654 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER AND ELECTROPHOTOGRAPHIC APPARATUS - An electrophotographic photosensitive member has a conductive substrate, a photoconductive layer formed on the conductive substrate, and a surface layer formed on the photoconductive layer. The photoconductive layer is formed of an amorphous material having chiefly silicon atoms. The surface layer has aluminum atoms, nitrogen atoms and oxygen atoms, where the nitrogen atoms are in a content of from 80 atom % or more to 95 atom % or less, and the oxygen atoms are in a content of from 1 atom % or more to 30 atom % or less, based on the aluminum atoms in the surface layer. | 07-09-2009 |
20090196654 | ELECTROPHOTOGRAPHIC PHOTORECEPTOR CONTAINING MIXTURE OF BISPHTHALOCYANINE-BASED COMPOUND AND PHTHALOCYANINE-BASED COMPOUND AND ELECTROPHOTOGRAPHIC IMAGING APPARATUS EMPLOYING THE ELECTROPHOTOGRAPHIC PHOTORECEPTOR - An electrophotographic photoreceptor includes an electrically conductive substrate, and a photosensitive layer formed on the electrically conductive substrate, in which the photosensitive layer includes a mixture of a bisphthalocyanine compound represented by a formula and a phthalocyanine compound represented by another formula. The mixture of the bisphthalocyanine compound represented by the formula and the phthalocyanine compound represented by the other formula has higher stability with respect to a transition of crystal type, crystal growth, and/or agglomeration in a photosensitive layer forming composition than a phthalocyanine-based charge generating material. Therefore, the electrophotographic photoreceptor including the mixture as a charge generating material has excellent and stable electrical properties. In addition, the electrophotographic photoreceptor can be prepared with relatively low manufacturing costs. | 08-06-2009 |
20090202274 | COATING FLUID FOR PHOTOSENSITIVE-LAYER FORMATION, PROCESS FOR PRODUCING THE SAME, PHOTORECEPTOR PRODUCED WITH THE COATING FLUID, IMAGE-FORMING APPARATUS EMPLOYING THE PHOTORECEPTOR, AND ELECTROPHOTOGRAPHIC CARTRIDGE EMPLOYING THE PHOTORECEPTOR - A coating fluid for photosensitive-layer formation having high productivity and stability and a process thereof are provided. Also provided are a high-performance electrophotographic photoreceptor and an image-forming apparatus which are capable of forming high-quality images even in various use environments and are less apt to cause image defects such as black spots or color spots. The objects are accomplished with a process for producing a coating fluid which is for forming a photosensitive layer of an electrophotographic photoreceptor and comprises a charge-generating material and a binder resin, wherein a dispersing medium having an average particle diameter in the range of from 1.0 μm to 350 μm is used as a dispersing medium for dispersing the charge-generating material in the coating fluid for photosensitive-layer formation. The coating fluid for photosensitive-layer formation produced by this process is preferable as a photosensitive layer of an electrophotographic photoreceptor. The charge-generating material preferably comprises a phthalocyanine pigment and the phthalocyanine pigment in the coating fluid preferably has a 50% cumulative particle diameter (D | 08-13-2009 |
20090208249 | COATING LIQUID FOR FORMING UNDERCOAT LAYER, METHOD FOR PREPARING COATING LIQUID FOR FORMING UNDERCOAT LAYER, ELECTROPHOTOGRAPHIC PHOTORECEPTOR, IMAGE-FORMING APPARATUS, AND ELECTROPHOTOGRAPHIC CARTRIDGE - Provided is a coating liquid for forming an undercoat layer of an electrophotographic photoreceptor exhibiting high stability. In the coating liquid for forming an undercoat layer of an electrophotographic photoreceptor containing metal oxide particles and a binder resin, the metal oxide particles have a cumulative volume average diameter D | 08-20-2009 |
20090208250 | ELECTROPHOTOGRAPHIC PHOTORECEPTOR, IMAGE-FORMING APPARATUS, AND ELECTROPHOTOGRAPHIC CARTRIDGE - An electrophotographic photoreceptor having high sensitivity and hardly affected by the transfer in an electrophotographic process is provided. The electrophotographic photoreceptor includes an undercoat layer containing metal oxide particles and a binder resin and a photosensitive layer disposed on the undercoat layer, wherein the metal oxide particles have a volume average particle diameter of 0.1 μm or less and a 90% cumulative particle diameter of 0.3 μm or less which are measured by a dynamic light-scattering method in a liquid of the undercoat layer dispersed in a solvent mixture of methanol and 1-propanol at a weight ratio of 7:3, and the photosensitive layer contains a binder resin having an ester bond. | 08-20-2009 |
20090214260 | ELECTROPHOTOGRAPHIC PHOTORECEPTOR AND IMAGE FORMATION APPARATUS - An objective is to provide an organic photoreceptor exhibiting high sensitivity, suitable for exposure to a semiconductor laser having an emission wavelength of 350-500 nm or a light emitting diode, with which generation of memory images as well as image defects caused by very small charge leakage is inhibited, and also to provide an image forming apparatus fitted with the organic photoreceptor. Also disclosed is an organic photoreceptor possessing a charge generation layer and a charge transport layer provided on a conductive substrate, wherein the charge generation layer contains particles made of a condensed polycyclic pigment, having an average major axis length of 500 nm or less, an average aspect ratio of 2.5-5.0, and an aspect ratio variation coefficient of 16% or less. | 08-27-2009 |
20090226215 | Photosensitive Body Having Electrical Connection Arrangement - A photosensitive body for electro-photography includes an electrically conductive photosensitive drum, an electrically conductive shaft, and an electrically conductive contact member. The photosensitive drum is rotatable relative to the shaft. The shaft includes a cylindrical shaft body and a metal coating formed on the outer surface of the shaft body and made from an electrically conductive material having an ionization tendency higher than a substrate of the shaft body. The contact member has an engagement portion in fitting engagement with an inner peripheral surface of the drum body, and has a contact portion resiliently and slidingly contacting the shaft to provide an electrical contact between the photosensitive drum and the shaft. | 09-10-2009 |
20090232551 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, IMAGE FORMING DEVICE USING SAME, AND ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER CARTRIDGE - To realize an electrophotographic photoreceptor excellent in abrasion resistance, the photosensitive layer of the photoreceptor comprises a polyester resin containing a repeating structural unit represented by the formula (1) and a hydrazone compound. | 09-17-2009 |
20090232552 | COATING LIQUID FOR FORMING UNDERCOAT LAYER, PHOTORECEPTOR HAVING UNDERCOAT LAYER FORMED OF THE COATING LIQUID, IMAGE-FORMING APPARATUS INCLUDING THE PHOTORECEPTOR, AND ELECTROPHOTOGRAPHIC CARTRIDGE INCLUDING THE PHOTORECEPTOR - Provided are a coating liquid for forming an undercoat layer exhibiting high stability, a process for forming the coating liquid, a high-performance electrophotographic photoreceptor that is capable of forming a high-quality image under various use environments and exhibiting reduced image defects such as black spots and color spots, and an image-forming apparatus and electrophotographic cartridge including the electrophotographic photoreceptor. In the coating liquid for forming an undercoat layer of an electrophotographic photoreceptor containing metal oxide particles and a binder resin, the metal oxide particles have a number average particle diameter of 0.10μm or less and a 10% cumulative particle diameter of 0.060 μm or less which are measured by a dynamic light-scattering method in the coating liquid for forming an undercoat layer. | 09-17-2009 |
20090245867 | ELECTROPHOTOGRAPHIC PHOTORECEPTOR, ELECTROPHOTOGRAPHIC PHOTORECEPTOR CARTRIDGE, AND IMAGE FORMING APPARATUS - To provide an electrophotographic photoreceptor showing suitable electric characteristics, capable of forming a favorable image even after repeated use for long term and capable of forming a high quality image free from image defects such as a memory phenomenon, an electrophotographic process cartridge using such an electrophotographic photoreceptor, and an image forming apparatus using such an electrophotographic photoreceptor. | 10-01-2009 |
20090245868 | ELECTROPHOTOGRAPHIC PHOTORECEPTOR AND IMAGE FORMATION DEVICE PROVIDED WITH THE SAME - An electrophotographic photoreceptor comprising at least a photosensitive layer formed by laminating a charge generation layer containing a charge generation material and a charge transport layer containing a charge transport material in this order, on a conductive support, wherein the charge generation layer contains an oxotitanylphthalocyanine as the charge generation material and metal oxide microparticles, and the electrophotographic photoreceptor has photosensitive properties in light source of wavelength range from 360 to 420 nm. | 10-01-2009 |
20090257776 | ELECTROPHOTOGRAPHIC PHOTORECEPTOR, IMAGE-FORMING APPARATUS, AND ELECTROPHOTOGRAPHIC CARTRIDGE - Provided is an electrophotographic photoreceptor that is excellent in electric characteristics and can form a high-quality image having reduced ghosting. In the electrophotographic photoreceptor including an undercoat layer containing metal oxide particles and a binder resin on an electroconductive support, and a photosensitive layer disposed on the undercoat layer, the metal oxide particles have a volume average particle diameter of 0.1 μm or less and a 90% cumulative particle diameter of 0.3 μm or less which are measured by a dynamic light-scattering method in a liquid containing the undercoat layer dispersed in a solvent mixture of methanol and 1-propanol at a weight ratio of 7:3; and the photosensitive layer contains a compound represented by the following Formula (I): | 10-15-2009 |
20090257777 | ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR AND IMAGE FORMING APPARATUS PROVIDED WITH THE SAME - An electrophotographic photoconductor containing at least a charge generation material and a charge transport material on a conductive support, the electrophotographic photoconductor comprising a diamine compound represented by the formula (1), and also a polyarylate resin having a structural unit represented by the following formula (I). | 10-15-2009 |
20090269103 | Photoreceptor, process cartridge and image forming apparatus - A photoreceptor including an electroconductive substrate, an undercoating layer provided overlying the electroconductive substrate that includes a compound comprising an epoxy group and a straight chain alkyl skeleton, a cross-linked resin, and a hydrophilic particulate; and a photosensitive layer provided overlying the undercoating layer. | 10-29-2009 |
20090324288 | Photoreceptor and Image Forming Apparatus Including the Same - According to an embodiment of the invention, a photoreceptor comprises a conductive substrate; a first semiconductor layer over the conductive substrate; a second semiconductor layer over the first semiconductor layer; and a third semiconductor layer over the second semiconductor layer. Each of the first and the third semiconductor layers comprises a p-type semiconductor. The second semiconductor layer has a hole density smaller than the first and the third semiconductor layers. | 12-31-2009 |
20100014888 | Electrophotographic Photosensitive Member and Image Forming Apparatus Provided with the Same - The present invention relates to an electrophotographic photosensitive member | 01-21-2010 |
20100014889 | SINGLE-LAYER ELECTROPHOTOGRAPHIC PHOTORECEPTOR AND IMAGE FORMING APPARATUS PROVIDED WITH THE SAME - The present invention provides a single-layer electrophotographic photoreceptor provided with a single-layer photosensitive layer that adapts to an exposing source emitting a laser beam with wavelengths of from 400 nm to 450 nm inclusive and is laminated on a conductive substrate, the single-layer photosensitive layer comprising: an enamine-type compound that functions as both a charge generation material and a charge transport material and is represented by the following general formula (1); and a perylene-type compound that functions as both an electron-transport material and a sensitizer and is represented by the following general formula (2): | 01-21-2010 |
20100021206 | PHOTOSENSITIVE BODY FOR ELECTRO-PHOTOGRAPHY - A photosensitive body for electro-photography includes a photosensitive drum, a shaft, and a contact segment. The photosensitive drum includes a drum body that has a cylindrical shape, electrical conductivity, and an outer peripheral surface, and a photosensitive layer that is formed on the outer peripheral surface. The photosensitive drum is rotatable about a central axis of the drum body. The shaft penetrates through the drum body and extends along the central axis. The photosensitive drum is rotatable relative to the shaft. The contact segment is interposed between the photosensitive drum and the shaft to electrically connects the shaft and the drum body. The contact segment includes a pair of contact portions that forms a gap therebetween. The pair of contact portions is aligned in a direction perpendicular to the central axis while contacting with an outer circumferential surface of the shaft. A portion of the outer circumferential surface is placed in the gap. | 01-28-2010 |
20100046985 | ELECTROPHOTOGRAPHIC PHOTORECEPTOR HAVING UNDERCOAT LAYER - An electrophotographic photoreceptor, comprising an electroconductive substrate, an undercoat layer comprising a binder resin and metal oxide particles having a refractive index of at least 2.0 formed on the electroconductive substrate, and a photosensitive layer formed on the undercoat layer, wherein a ratio of a specular reflection of the undercoat layer calculated as a thickness of 2 μm to a light having a wavelength of 480 nm, to the specular reflection of the electroconductive substrate to a light having a wavelength of 480 nm, is at least 50%. | 02-25-2010 |
20100054810 | COATING FLUID FOR FORMING UNDERCOAT LAYER AND ELECTROPHOTOGRAPHIC PHOTORECEPTOR HAVING UNDERCOAT LAYER FORMED BY APPLYING SAID COATING FLUID - To provide a coating fluid for forming an undercoat layer having high stability, a high quality and long-life electrophotographic photoreceptor capable of forming a high quality image in various environments, with which image defects such as black spots or color spots hardly occur, an image forming apparatus using such a photoreceptor, and an electrophotographic cartridge using such a photoreceptor. | 03-04-2010 |
20100067950 | Image Forming Apparatus, Photoreceptor Unit, and Transfer Belt Unit - An image forming apparatus includes: a latent image carrier; an exposure unit which forms a latent image on the latent image carrier; a developing unit which develops the latent image formed on the latent image carrier by the exposure unit using liquid developer; a squeeze roller which contacts the latent image carrier, and applies bias voltage to the latent image carrier after development by the developing unit; an electrification reducing light source which supplies light to the latent image carrier to which bias is applied by the squeeze roller; a transfer member which contacts the latent image carrier and receives the image transferred from the latent image carrier; and a reflection preventing member disposed between the transfer member and the electrification reducing light source. | 03-18-2010 |
20100086330 | Electrophotographic Photosensitive Body, Process for Manufacturing the Same, and Image Forming Apparatus Provided with Such Electrophotographic Photosensitive Body - [Problems] To provide an electrophotographic photosensitive body which can perform object identification management more appropriately without having a substantial effect on printing, and to provide its production method and an image forming apparatus equipped with that electrophotographic photosensitive body. | 04-08-2010 |
20100092212 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE BODY - Disclosed is an electrophotographic photosensitive body which is remarkably improved in pencil scratch resistance and wear resistance. Specifically disclosed is an electrophotographic photosensitive body wherein a polycarbonate resin having a structural unit (1) represented by the formula below is used as a binder resin for a photosensitive layer (or for a charge-transporting layer in case of multilayer type) which is formed on a conductive base. [chemical formula 1] (1) (In the formula, R | 04-15-2010 |
20100111564 | IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE - An electrophotographic image forming apparatus including an image bearing member which is a rotatable photoconductor containing an organic photoconductive layer on a conductive cylindrical support, a latent electrostatic image forming unit configured to charge the image bearing member to form a latent electrostatic image thereon, and a developing unit configured to develop the latent electrostatic image on the image bearing member with a developer to form a visible image, wherein the thickness of the organic photoconductive layer monotonically decreases or increases along the rotational axis from one end to the other end, wherein the developing unit includes a development sleeve for bearing and transferring the developer to a developing region, and wherein a development gap is formed between the image bearing member and the development sleeve, and becomes narrower from one end where the organic photoconductive layer is thicker to the other end where the organic photoconductive layer is thinner. | 05-06-2010 |
20100119259 | IMAGE FORMING APPARATUS - A positioning roller is configured to be pressed against an abutment block by a reactive force produced when the positioning roller abuts on an S-D-direction abutment block. | 05-13-2010 |
20100119260 | PHOTORECEPTOR, IMAGE FORMATION METHOD, IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE - A photoreceptor including an electroconductive substrate, a photosensitive layer located overlying the electroconductive substrate, and a surface layer located overlying the photosensitive layer, wherein the surface layer is a cross linked surface layer comprising filler particulates on which linear scar is formed along the circumference direction, and the filler particulates form concave portions on a groove formed by the linear scar, and wherein the ten point average roughness Rz along the direction of the rotation axis of the photoreceptor measured on the circumference surface thereof is from 0.17 to 2.00 μm and the average distance Sm of concavities and convexities along the direction of the rotation axis of the photoreceptor measured on the circumference surface thereof is from 20 to 500 μm, and the ten point average roughness Rz along the circumference direction of the photoreceptor measured on the circumference surface thereof is from 0.13 to 0.50 μm and the average distance Sm of concavities and convexities along the circumference direction of the photoreceptor measured on the circumference surface thereof is from 10 to 40 μm. | 05-13-2010 |
20100129115 | ORGANIC PHOTORECEPTOR, MANUFACTURING METHOD OF ORGANIC PHOTORECEPTOR, AND IMAGE FORMING APPARATUS - An organic photoreceptor having a photosensitive layer, an electric conductive support, and a protective layer is disclosed, in which the protective layer comprises a composition produced by reacting tin oxide particles an acryloyl or methacryloyl group on their surface with a compound having an acryloyl or methacryloyl group. A production method of the same, an image forming apparatus and a process cartridge using the same are also disclosed. | 05-27-2010 |
20100150608 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE BODY, IMAGE-FORMING DEVICE USING SAME AND CARTRIDGE - To provide an electrophotographic photoreceptor excellent in electric characteristics and various characteristics, capable of forming a uniform photosensitive layer and excellent in repetitive characteristics, an image forming apparatus using it and an electrophotgraphic cartridge. | 06-17-2010 |
20100150609 | SEMICONDUCTIVE MEMBER, AND DEVELOPING ROLL, CHARGING ROLL, TRANSFER BELT, AND IMAGE FORMING APPARATUS USING SAME - A semiconductive member including an alkali metal salt having the formula (M) | 06-17-2010 |
20100150610 | ELECTROPHOTOGRAPHIC PHOTORECEPTOR AND IMAGE FORMING APPARATUS - Provided is an electrophotographic photoreceptor comprising a conductive support provided thereon, a light sensitive layer and a surface layer in this order, wherein the surface layer is formed by a curing reaction of a composition comprising metal oxide particle of which surface are treated by at least a compound having methacryloyl group; and a peak value Tac at 1610-1640 cm | 06-17-2010 |
20100183331 | Electrophotographic Photosensitive Body and Image Forming Apparatus Provided with the Same - [Problems] To provide an electrophotographic photosensitive body that reduces non-uniform image density and that can enhance a definition of an image, and an image forming apparatus provided with the same. | 07-22-2010 |
20100183332 | ELECTROPHOTOGRAPHIC PHOTORECEPTORS, ELECTROPHOTOGRAPHIC PHOTORECEPTOR CARTRIDGE, AND IMAGE-FORMING APPARATUS - An electrophotographic photoreceptor comprising a conductive support and a photosensitive layer formed thereon, wherein the photosensitive layer comprises a polyarylate resin having a repeating structure represented by the following formula [1] and a compound represented by the following formula [6]. This electrophotographic photoreceptor has excellent wearing resistance under load in the practical use of the photoreceptor and has high mechanical strength and extremely satisfactory electrical characteristcis. [1] [6] | 07-22-2010 |
20100196049 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus including an image bearing member for bearing a latent electrostatic image including a substrate, an intermediate layer containing a metal oxide, a photosensitive layer including a charge transport layer and a charge generating layer containing an organic charge generating material, an image forming device for forming the latent electrostatic image on the image bearing member, a developing device for developing the latent electrostatic image with a toner to form a visualized image, a transfer device for transferring the visualized image to a recording medium, a fixing device for fixing the transferred image on the recording medium; and a discharging device including a light source that provides light having a wavelength shorter than 500 nm for optically discharging the image bearing member to remove remaining charges thereon by irradiating the image bearing member with light having a wavelength shorter than 500 nm which is absorbed by the metal oxide in the intermediate layer. | 08-05-2010 |
20100221040 | ELECTROPHOTOGRAPHIC PHOTORECEPTOR AND APPARATUS FOR IMAGE FORMATION - To provide an electrophotographic photoreceptor which is excellent in electrical characteristics and image characteristics even at a low content of a charge transport material and which is less susceptible to a change in characteristics due to a change in the environment and has high durability with little deterioration, and an image forming apparatus having such an electrophotographic photoreceptor. | 09-02-2010 |
20100221041 | PHOTOCONDUCTIVE DRUM AND IMAGE FORMING APPARATUS HAVING THE SAME - A disclosed photoconductive drum includes a mechanism where, when the sleeve inner circumferential surface pressing member is in contact with the inner circumferential surface of the photoconductive sleeve member, a displacement of the first end surface member with respect to the photoconductive sleeve member in the center line direction leads to increasing a pressing force applied from the sleeve inner circumferential surface pressing member to the inner circumferential surface of the photoconductive sleeve member. | 09-02-2010 |
20100239317 | IMAGE FORMING UNIT AND IMAGE FORMING APPARATUS - A durability with respect to a film wear and defect of a photosensitive layer on the photosensitive body is improved, and thinning the photosensitive layer is planned. An image forming unit that comprises a photosensitive body; a charge means that charges surface of the photosensitive body; a development means that develops an electrostatic latent image formed on the surface of the photosensitive body with the developer through shining an exposure light to form a developer image on the surface of the photosensitive body; and a cleaning means that removes remaining developer on the surface of the photosensitive body by pressing against the surface of the photosensitive body. On the top surface layer of the photosensitive body, Martens hardness value is 175˜196N/mm | 09-23-2010 |
20100247148 | IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE - There is provided an image forming apparatus including electrophotographic photoreceptor, a charging unit, an electrostatic latent image forming unit, a developing unit, and a residual toner removing unit, the surface protective layer of the electrophotographic photoreceptor having a surface free energy of about 10 mN/m to about 30 mN/m, the toner in the developing unit includes silica, and the residual toner removing unit including a blade member including a base layer and an edge layer having a type A durometer hardness of from about HsA 75 to about HsA 90 at 23° C., the hardness of the edge layer baing higher than the hardness of the base layer. | 09-30-2010 |
20100260517 | Electrophotographic Photosensitive Body and Image Forming Device Having an Electrophotographic Photosensitive Body - A negative charging electrophotographic photosensitive body has a base, a photoconductive layer made of an amorphous silicon compound and formed amorphous silicon compound and formed on the base, a charge injection blocking layer formed on the photoconductive layer, and a surface layer formed on the charge injection blocking layer. The charge injection blocking layer contains at least one element selected from a group of N, O, and C and a group-13 element. The optical absorption coefficient of the charge injection blocking layer is smaller than that of the photoconductive layer, and the difference between the refractive index of the photoconductive layer and that of the charge injection blocking layer is greater than 0 and less than 0.9. | 10-14-2010 |
20100290807 | ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR, AND ELECTROPHOTOGRAPHIC METHOD, ELECTROPHOTOGRAPHIC APPARATUS AND PROCESS CARTRIDGE CONTAINING THE ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR - An electrophotographic photoconductor including a conductive substrate and a photoconductive layer thereover, wherein the photoconductive layer contains a charge generation agent and a charge transport agent represented by General Formula (A-I), (B-I) or (C-I), and an amine compound represented by General Formula (II): | 11-18-2010 |
20100290808 | Electrophotographic Photoreceptor and Image Formation Apparatus - The present invention is characterized in that an electrophotographic photoreceptor comprises an electrically conductive support and provided thereon, a charge generation layer and a charge transport layer in that order, wherein the charge transport layer contains a resin having a repeating unit represented by the following formula (1), a charge transport material represented by the following formula (2), and an ultraviolet absorbent in an amount of from 0.1 to 30.0% by weight based on the weight of the charge transport material, and can provide an organic photoreceptor exhibiting high thin line reproduction, employing a small diameter exposure light spot, and excellent durability capable of forming a stable image for a long period, wherein even when an image is repeatedly formed at high speed, exposure electric potential variation is reduced and image memory generation is prevented, and an image formation apparatus employing the organic photoreceptor. | 11-18-2010 |
20100303500 | IMAGE FORMING APPARATUS - The present invention therefore provides an image forming apparatus, comprising: a photoconductor; a charge means for charging the photoconductor; an exposure means for irradiating a surface of the photoconductor with light to form an electrostatic latent image; a development means for developing the electrostatic latent image formed; a transfer means for transferring the image developed onto a paper sheet; and a discharge means for irradiating the surface of the photoconductor with light to eliminate charges, wherein the photoconductor contains a titanylphthalocyanine having absorption bands in a wavelength region of 380 nm to 420 nm and a wavelength region of 600 nm to 850 nm as a charge generation material, the exposure means irradiates the surface of the photoconductor with light having a wavelength of 380 nm to 420 nm to form the electrostatic latent image, and the discharge means irradiates the surface of the photoconductor with light having a wavelength of 600 nm to 850 nm to eliminate the charges. | 12-02-2010 |
20100316410 | PHOTORECEPTOR INTERFACIAL LAYER - The presently disclosed embodiments relate generally to layers that are useful in imaging apparatus members and components, for use in electrostatographic, including digital, apparatuses. Embodiments pertain to an improved electrostatographic imaging member comprising an interfacial layer further comprising an opaque semi-crystalline polyester resin that is also a hot-melt adhesive to prevent light transmission to the substrate and thus significantly reduce “plywood effect,” a print quality defect. | 12-16-2010 |
20100316411 | IMAGE FORMING APPARATUS - An image forming apparatus comprising an electrophotographic photoreceptor having a photosensitive layer on an electroconductive substrate, and a toner for developing an electrostatic charge image, wherein the photosensitive layer of the electrophotographic photoreceptor contains a phthalocyanine obtained via an acid paste step; the toner for developing an electrostatic charge image is a toner for developing an electrostatic charge image containing toner matrix particles formed in an aqueous medium; the toner has a volume median diameter (Dv50) of from 4.0 μm to 7.0 μm; and the relationship between the volume median diameter (Dv50) and the percentage in number (Dns) of toner particles having a particle diameter of from 2.00 μm to 3.56 μm satisfies the following formula (1): | 12-16-2010 |
20100316412 | IMAGE FORMING APPARATUS - An image forming apparatus comprising an electrophotographic photoreceptor having a photosensitive layer on an electroconductive substrate, and a toner for developing an electrostatic charge image, wherein the photosensitive layer of the electrophotographic photoreceptor contains a phthalocyanine obtained via an acid paste step; the toner for developing an electrostatic charge image is a toner for developing an electrostatic charge image containing toner matrix particles formed in an aqueous medium; the toner has a volume median diameter (Dv50) of from 4.0 μm to 7.0 μm; and the relationship between the volume median diameter (Dv50) and the percentage in number (Dns) of toner particles having a particle diameter of from 2.00 μm to 3.56 μm satisfies the following formula (1): | 12-16-2010 |
20100329741 | IMAGE FORMING APPARATUS, IMAGE BEARING MEMBER, AND METHOD OF MANUFACTURING IMAGE BEARING MEMBER - An image forming apparatus including an image bearing member having a photosensitive layer and the surface including concave portions having a concave diameter of from 5 to 200 μm, an irradiation device that irradiates the surface of the image bearing member with light to form a latent electrostatic image thereon, a development device that develops the latent electrostatic image with a development agent containing toner to obtain a visualized image, a transfer device that transfers the visualized image to a transfer medium, a first cleaning brush to which a bias is applied with a polarity reverse to that of the toner remaining on the surface of the image bearing member after the visualized image is transferred, and a second cleaning brush to which a bias is applied with the same polarity as that of the toner remaining on the surface of the image bearing member. | 12-30-2010 |
20110020035 | IMAGE FORMING APPARATUS - A cleaner-less image forming apparatus includes an LED which is arranged with a closest distance of 10 to 5000 μm to a photosensitive member and exposes the photosensitive member. In the image forming apparatus, an absolute value of an average current amount of a developer is between 50 μC/g and 90 μC/g, and a contact angle of the photosensitive member with respect to pure water is not less than 90° and not more than 150°. | 01-27-2011 |
20110038650 | TONERS FOR ELECTROSTATIC-IMAGE DEVELOPMENT, CARTRIDGE EMPLOYING TONER FOR ELECTROSTATIC-IMAGE DEVELOPMENT, AND IMAGE-FORMING APPARATUS - An object of the invention is to provide a toner which is effective in improving image quality while inhibiting white-background fouling, residual-image phenomenon (ghost), blurring (suitability for solid printing), and the like that occur depending on the proportion of a fine powder having a particle diameter not larger than a specific value, and which has satisfactory removability in cleaning, mitigates problems concerning fouling, etc. in long-term use even on a high-speed printer, and attains excellent image stability. Another object is to provide an image-forming apparatus and a toner cartridge each employing the toner. The invention provides a toner for electrostatic-image development satisfying all of the following (1) to (4) or a toner for electrostatic-image development which is a toner containing a charge control agent and satisfying all of the following (5) to (7). The invention further provides an image-forming apparatus and a toner cartridge each employing the toner. | 02-17-2011 |
20110038651 | Electrophotographic Photoreceptor, Image Forming Apparatus, and Method for Image Formation - Disclosed is an electrophotogaphic photoreceptor that causes little or no abrasion-derived uneven image density and does not cause scratches and image defects attributable to the occurrence of scratches even after a large volume, for example, exceeding 1,000,000 sheets of printing, and that does not cause image blurring even after printing in an environment of a high-temperature and a high-relative humidity (RH) respectively exceeding 30° C. and 80%. The electrophotographic photoreceptor comprises an electroconductive support and at least a photosensitive layer and a surface layer provided on the electroconductive support and is characterized in that the surface layer contains at least a compound obtained by reacting a polymerizable compound containing a methacryl group with particles containing a functional group reactive with the methacryl group and, in the polymerizable compound, the ratio between the number of methacryl groups and the molecular weight (number of methacryl groups/molecular weight) is not less than 0.0055. | 02-17-2011 |
20110076057 | ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR, METHOD FOR PRODUCING ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR, AND IMAGE FORMING APPARATUS - To provide an electrophotographic photoconductor including: a conductive substrate; a photosensitive layer; and a surface layer having grooves which do not intersect each other, the photosensitive layer and the surface layer being laid over the conductive substrate, wherein the grooves each have a width of 60 μm to 100 μm and a depth of 0.2 μm to 2 μm, wherein the standard deviation of the depths of the grooves is 1/10 or less of the average value of the depths of the grooves measured at any four places, and wherein the grooves are formed in a direction which diagonally crosses a main scanning direction and a sub-scanning direction of the electrophotographic photoconductor. | 03-31-2011 |
20110085823 | ELECTROPHOTOGRAPHIC PHOTORECEPTOR AND IMAGE FORMING APPARATUS PROVIDED WITH THE SAME - An electrophotographic photoreceptor comprising: a conductive support, a photosensitive layer and an intermediate layer interposed between the conductive support and the photosensitive layer, wherein the intermediate layer contains metal oxide microparticles surface-treated with silicon dioxide anhydride and a binder resin; and the binder resin contains a polyamide resin containing a piperazine-based compound. | 04-14-2011 |
20110085824 | IMAGE BEARING MEMBER AND IMAGE FORMING APPARATUS - An image bearing member including an electroconductive substrate, a photosensitive layer provided overlying the electroconductive substrate, an optional layer overlying the photosensitive layer, and boron nitride attached to at least part of the surface of an outermost layer. | 04-14-2011 |
20110176830 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - According to one embodiment, a method of setting, when at least one of image forming units does not perform image formation, an electric field between an image carrier and a transfer device of the image forming unit which does not perform the image formation to have the same direction as that of an electric field between the image carrier and the transfer device which perform the image formation and have a lower strength can be obtained. | 07-21-2011 |
20110176831 | LOW FRICTION ELECTROSTATOGRAPHIC IMAGING MEMBER - Present embodiments pertain to an improved electrostatographic imaging member having low contact friction surfaces to ease sliding mechanical interaction and suppressing abrasion/wear failure and methods of preparing thereof. The improved imaging member has layers comprising one or two low surface energy polymeric materials that enhance the physical and mechanical functions and reduce the layers surface contact friction of the imaging member to extend service life. | 07-21-2011 |
20110182622 | DEVICE FOR HOLDING A PHOTORECEPTOR SHEET - A device for holding a photoreceptor sheet onto a drum of an electro-photography printing device comprises first and second holding surfaces that are configured to hold an edge of the photoreceptor sheet from opposite directions by pressing against the sheet in a substantially perpendicular direction with respect to the surface of the sheet, wherein at least the second holding surface is pre-loaded. | 07-28-2011 |
20110217078 | ELECTROPHOTOGRAPHIC PHOTORECEPTOR AND IMAGE FORMING APPARATUS - An organic photoreceptor having a photosensitive layer on a conductive support is disclosed, in which the photosensitive layer contains a pigment containing an adduct of titanyl phthalocyanine and at least either of (2R,3R)-2,3-butanediol and (2S,3S)-2,3-butanediol, the spectrum of the photosensitive layer has the absorption maximum value in the region of 750 to 780 nm, and the ratio of the absorbance at 780 nm (Abs 780) to the absorbance at 750 nm (Abs 750) (Abs 780/Abs 750, a value obtained by correcting the absorbance at 1000 nm as 0) is 0.6 to 1.0. | 09-08-2011 |
20110222908 | Fixing device and image forming apparatus using the same - A disclosed fixing device includes a first roller, a second roller, a lubricant application unit applying lubricant to a surface of the first roller, a lubricant control blade being in contact with and separated from the surface of the first roller, so that the recording medium on which the image is formed is sandwiched and fed between the first roller and the second roller so as to fix the image onto the recording medium, a contact angle θ of the lubricant control blade relative to the first roller is in a range between 35 degrees and 43 degrees, and a linear pressure F applied from the lubricant control blade to the first roller is in a range from 0.35 N/cm to 0.5 N/cm. | 09-15-2011 |
20110255904 | LOW FRICTION ELECTROSTATOGRAPHIC IMAGING MEMBER - Present embodiments pertain to an improved electrostatographic imaging member having low contact friction surfaces to ease sliding mechanical interaction and suppressing abrasion/wear failure and methods of preparing thereof. The improved imaging member has layers comprising one or two low surface energy polymeric materials that enhance the physical and mechanical functions and reduce the layers surface contact friction of the imaging member to extend service life. | 10-20-2011 |
20110299886 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER AND ELECTROPHOTOGRAPHIC APPARATUS - An electrophotographic photosensitive member is disclosed which has a change layer consisting of five or more a-SiC intermediate layers, provided between an a-Si photoconductive layer and an a-SiC surface layer. Where two layers contiguous to each other in which C/(Si+C) is from 0.35 to 0.65 are selected from among the a-SiC intermediate layers included in the change layer, the rate of increase between the C/(Si+C) of an a-SiC intermediate layer on the photoconductive layer side and the C/(Si+C) of an a-SiC intermediate layer on the surface layer side (i.e., the rate of increase between layers) is 19% or less. | 12-08-2011 |
20110299887 | IMAGE FORMING APPARATUS - An image forming apparatus includes a positively-charged single layer type electrophotographic photoreceptor, a charging device with a contact charging roller for charging a surface of the photoreceptor and an exposure device for exposing the charged surface of the photoreceptor to light to form an electrostatic latent image thereon. A developing device develops the electrostatic latent image into a toner image and a transfer device transfers the toner image to a transferred body. The charging roller is made of electrically conductive rubber having an Asker-C rubber hardness of 62 to 81°. A roller surface roughness of the charging roller has an average distance (Sm) between asperity peaks on a cross-sectional curve of 55 to 130 μm and that a ten-point average roughness (Rz) is 9 to 19 μm. The image forming apparatus is capable of preventing carrier trapping, film peeling and uneven charging in the photoreceptor. | 12-08-2011 |
20110299888 | IMAGE FORMING APPARATUS - An image forming apparatus has: a positively-charged single layer type electrophotographic photoreceptor; a charging device with a contact charging roller for charging a surface of the photoreceptor; an exposure device for exposing the charged surface to light to form an electrostatic latent image on the surface of the photoreceptor; a developing device for developing the electrostatic latent image into a toner image; and a transfer device for transferring the toner image to a transferred body. The photoreceptor has a conductive substrate and a photosensitive layer that contains a charge generating agent, a charge transport agent and a binder resin. The binder resin has a yield point strain of 9 to 29%, and the contact charging roller has a conductive layer with a thickness of 1 mm to 3 mm. The image forming apparatus is environmentally responsive and having a long-lasting positively-charged single layer type photoreceptor and charging roller. | 12-08-2011 |
20110305483 | FIXING DEVICE AND IMAGE FORMING APPARATUS - According to an aspect of the invention, a fixing device includes, a fixing member that fixes an image onto a sheet, a satellite member arranged parallel to the fixing member with respect to an axial direction and having a smaller heat capacity than the fixing member, an endless belt laid over the fixing member and the satellite member, and a pressurizing member facing the fixing member and forming a nip via the endless belt. | 12-15-2011 |
20120003007 | ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR, IMAGE FORMING METHOD, IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE - An electrophotographic photoconductor including a metal tube and a photoconductive layer on the metal tube, wherein the metal tube has an outer diameter of 40 mm to 300 mm, and has a total runout of 5 μm to 70 μm relative to a driving axis thereof. | 01-05-2012 |
20120003008 | PHOTOCONDUCTOR FOR ELECTROPHOTOGRAPHY - A method for making a photoconductor for electrophotography can comprise depositing a charge generating layer on an electrode; depositing a charge transfer layer on the charge generating layer, where a plurality of charge transfer molecules are disposed within the charge transfer layer; depositing a film of non-conducting material onto the surface of the charge-transfer layer; heating the film and the surface to cause a subset of the charge transfer molecules to move into the non-conducting material, creating in the film a conducting sub-layer and an insulating sub-layer, where the insulating sub-layer is substantially free of charge transfer molecules. | 01-05-2012 |
20120008982 | IMAGE FORMING APPARATUS TO CHARGE PHOTORECEPTOR IN NON-CONTACT MANNER AND CHARGING MEMBER - An image forming apparatus includes a photoreceptor and a charging member. The photoreceptor includes a long-shaped raw pipe and a photoconductive layer that covers a center portion of the raw pipe in a longitudinal direction and forms exposed parts at ends of the raw pipe in the longitudinal direction. The charging member is arranged in parallel to the photoreceptor through a gap. The charging member includes a long-shaped conductive support body and a resistance adjustment layer that covers a center portion of the conductive support body in the longitudinal direction, and charges the photoconductive layer. Besides, the charging member includes a gap keeping member and a discharge preventing part. The gap keeping member is provided at a position outwardly spaced from a photoconductive layer opposite area by a specified distance in the longitudinal direction of the conductive support body, contacts the exposed part, and keeps a gap between the resistance adjustment layer and the photoconductive layer. The discharge preventing part covers a separation area between the resistance adjustment layer and the gap keeping member in the longitudinal direction of the conductive support body, and prevents discharge from the exposed part to the separation area. | 01-12-2012 |
20120008983 | PHOTOSENSITIVE-MEMBER UNIT AND IMAGE FORMING APPARATUS - A pressing member applies a pressing force to a trailing end in a direction which intersects a predetermined reference direction, allowing the pressing force to have both a first component in the predetermined reference direction and a second component perpendicular to the predetermined reference direction. A trailing end is pressed in the predetermined reference direction by the first component. In the mounted state, the leading end is in contact with the reference member at two contact surfaces including a first contact surface and a second contact surface. The first contact surface defines a first positioning direction being perpendicular to the first contact surface and intersecting the predetermined reference direction. The second contact surface defines a second positioning direction being perpendicular to the second contact surface and intersecting both the predetermined reference direction and the first positioning direction, allowing the photosensitive-member unit to be positioned with respect to the main body. | 01-12-2012 |
20120008984 | ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR, PRODUCTION METHOD OF THE SAME, IMAGE FORMING APPARATUS, AND PROCESS CARTRIDGE - An electrophotographic photoconductor having a photosensitive layer and a crosslinked resin surface layer over a support, wherein shapes of concaves and convexes in a surface of the electrophotographic photoconductor are measured by a surface roughness/profile measuring device to obtain one-dimensional data arrays, the arrays are subjected to multiresolution analysis (MRA-1) through wavelet transformation to be separated into six frequency components including HHH, HHL, HMH, HML, HLH and HLL to obtain one-dimensional data arrays, the arrays of the HHL are thinned out to be reduced 1/10 to 1/100, thereby producing one-dimensional data arrays, which are then subjected to multiresolution analysis (MRA-2) through wavelet transformation to be separated into six frequency components including LHH, LHL, LMH, LML, LLH and LLL to thereby obtain 12 frequency components in total; and a center-line average roughness (WRa) of the 12 frequency components satisfies relationship (i) below. | 01-12-2012 |
20120014714 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus including a latent electrostatic image bearing member, a latent electrostatic image forming unit, a developing unit, a transfer unit and a fixing unit, wherein the fixing unit includes rotatable heating member heating the recording medium having the unfixed visible image, rotatable pressing member coming into contact with the rotatable heating member to form a nip portion, and an air separation member separating the recording medium from the rotatable heating member by air, the toner including toner base particles each including binder resin and releasing agent, the binder resin including crystalline polyester resin and non-crystalline resin, and ratio of W/R being 0.045 to 0.85, where W denotes peak height in spectrum of the crystalline polyester resin, R denotes peak height in spectrum of the non-crystalline resin, and each of the spectra is measured by total transmission method (KBr method) using Fourier transform infrared (FT-IR) spectrometer. | 01-19-2012 |
20120027463 | IMAGE FORMING APPARATUS - An image forming apparatus including an image bearing member to bear an electrostatic latent image, which includes an outermost layer comprising a cross-linked resin composition; a toner developing mechanism to develop the electrostatic latent image into a toner image with a toner comprising a binder resin; a toner transferring mechanism to transfer the toner image from the image bearing member onto a recording medium; and a fixing liquid applying mechanism to apply a fixing liquid to the recording medium onto which the toner image has been transferred or is to be transferred. The fixing liquid dissolves or swells at least a part of the binder resin to soften the toner. | 02-02-2012 |
20120033994 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, METHOD FOR PRODUCING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - An electrophotographic photosensitive member is provided in which both a long-term potential variation and a short-term potential variation are suppressed, a method for producing the electrophotographic photosensitive member, and a process cartridge and an electrophotographic apparatus each having the electrophotographic photosensitive member are also provided. An intermediate layer of the electrophotographic photosensitive member is formed by applying a coating liquid for the intermediate layer, which contains an organic resin and a rutile-type acidic titania sol containing tin, and drying the applied coating liquid. | 02-09-2012 |
20120039630 | IMAGE FORMING APPARATUS - An image forming apparatus containing an electrophotographic photoreceptor and a toner for developing an electrostatic charge image, where the electrophotographic photoreceptor has an electroconductive substrate with a surface roughness Ra of from 0.01 μm to 0.3 μm; the toner for developing an electrostatic charge image is a toner for developing an electrostatic charge image containing toner matrix particles formed in an aqueous medium; the toner has a volume median diameter (Dv50) of from 4.0 μm to 7.0 μm; and the relationship between the volume median diameter (Dv50) and the percentage in number (Dns) of toner particles having a particle diameter of from 2.00 μm to 3.56 μm satisfies formula (1): | 02-16-2012 |
20120045246 | IMAGE FORMING APPARATUS - An image forming apparatus containing an electrophotographic photoreceptor and a toner for developing an electrostatic charge image, where the electrophotographic photoreceptor has an undercoat layer containing metal oxide particles; the toner for developing an electrostatic charge image is a toner for developing an electrostatic charge image containing toner matrix particles formed in an aqueous medium; the toner has a volume median diameter (Dv50) of from 4.0 μm to 7.0 μm; and the relationship between the volume median diameter (Dv50) and the percentage in number (Dns) of toner particles having a particle diameter of from 2.00 μm to 3.56 μm satisfies the following formula (1): | 02-23-2012 |
20120076538 | PHOTOSENSITIVE DRUM AND PROCESS CARTRIDGE - A photosensitive drum for use with an image forming apparatus includes a cylinder, having a photosensitive layer at its surface, to which process means is contacted; and a flange provided at a longitudinal end portion of the cylinder. The flange includes a supporting portion supporting an inner peripheral portion of the cylinder, a portion to be supported inside the cylinder by a supporting shaft for supporting the photosensitive drum, and a clearance portion which is provided in a region closer to a longitudinal end of the cylinder than the portion to be supported and which is out of contact with the supporting shaft. The portion to be supported is provided at a position that overlaps with the supporting portion with respect to a longitudinal direction of the cylinder as seen in a diameter direction of the cylinder. The clearance portion extends from the contact area to an area outside the contact area. | 03-29-2012 |
20120099897 | SURFACE-PATTERNED PHOTORECEPTOR - Presently disclosed embodiments relate generally to layers that are useful in imaging apparatus members and components, for use in electrophotographic, including digital, apparatuses. More particularly, the embodiments pertain to an electrophotographic imaging member having its outer surface patterned such that friction with the cleaning blade is significantly reduced. | 04-26-2012 |
20120099898 | ELECTROPHOTOGRAPHIC APPARATUS - An electrophotographic apparatus is provided including an electrophotographic photosensitive member which includes a surface protective layer; and an exposure device which irradiates a surface of the electrophotographic photosensitive member with an exposure beam so as to form an electrostatic latent image on the surface of the electrophotographic photosensitive member, wherein the surface protective layer includes a material having no structure to provide charge transporting performance and has a plurality of through holes penetrating from the side of the front surface of the surface protective layer to the side of the charge transport layer, and the thickness of the surface protective layer is from 0.1 μm or more to 1.5 μm or less, and wherein when the surface of the electrophotographic photosensitive member is irradiated with the exposure beam, two or more of the through holes are included in an exposure beam spot. | 04-26-2012 |
20120114379 | ELECTROPHOTOGRAPHIC PHOTORECEPTOR, PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS - An electrophotographic photoreceptor includes: an electrophotographic photoreceptor body containing a cylindrical electroconductive substrate having openings at both ends in an axial direction, the cylindrical electroconductive substrate having a thickness of approximately 2 mm or more at a center portion in an axial direction and having a socket joint portion on each of inner surfaces of both end portions in an axial direction; and a photosensitive layer provided on an outer surface of the electroconductive substrate; and a support member fit in the openings of the electroconductive substrate, having an fitting portion which has an outer diameter that is larger than a diameter of the opening by a range of from approximately 0.01 mm to approximately 0.1 mm, the fitting portion being press-fit into the opening. | 05-10-2012 |
20120134713 | METHOD OF MANUFACTURING ELECTROPHOTOGRAPHIC PHOTORECEPTOR, ELECTROPHOTOGRAPHIC PHOTORECEPTOR, IMAGE-FORMING APPARATUS, AND PROCESS CARTRIDGE - An aspect of the present invention provides a method of manufacturing an electrophotographic photoreceptor. The method includes forming at least one layer selected from the group consisting of an undercoat layer, a photosensitive layer, and a protective layer, by jetting by an inkjet method a first coating liquid and a second coating liquid from liquid drop discharging heads which are different from each other, and mixing the first coating liquid and the second coating liquid on a conductive substrate. The first coating liquid and the second coating liquid react with each other when they are mixed. | 05-31-2012 |
20120155919 | FUSER MEMBER AND METHOD OF MANUFACTURE - There is described a fuser roller including a surface layer of anodized aluminum oxide impregnated with a fluorine containing sealant. There is also described the method for producing the fuser member. | 06-21-2012 |
20120155920 | IMAGING MEMBERS HAVING AN ENHANCED CHARGE TRANSPORT LAYER - The presently disclosed embodiments are directed to charge transport layers useful in electrostatography. More particularly, the embodiments pertain to an improved electrostatographic imaging member having a specific photoreceptor material package comprising an undercoat layer, a charge generation layer, a charge transport layer comprising Tm-TBD/tris(butadienylaryl)amine, and an overcoat layer. The charge transport layer molecule provides substantially reduced C zone residual potential and therefore alleviates the problems of low optical density and ghosting. | 06-21-2012 |
20120163865 | PHOTOSENSITIVE DRUM AND VIBRATION REDUCTION METHOD FOR SAME, AND PHOTOSENSITIVE DRUM UNIT - Disclosed is a photosensitive drum that is provided with a structure that can decrease noise-causing vibrations without being accompanied by the addition of new parts. The photosensitive drum ( | 06-28-2012 |
20120189346 | IMAGE FORMING APPARATUS - An image forming apparatus includes: a main body having an opening; a photoconductor unit including a photoconductor and removably mountable to the main body through the opening by moving the photoconductor unit in a first direction; an exposure member; and a moving mechanism configured to move the exposure member to and away from the photoconductor. The moving mechanism includes: a fixed shaft having an axial line thereof fixed relative to the main body; a first arm including one end portion thereof which is supported rotatably around the axial line of the fixed shaft; a movable shaft having an axial line thereof which is movable relative to the main body; and a second arm including: one end portion supporting the exposure member; and another end portion connected to the first arm via the movable shaft, and the second arm being swingable around the axial line of the movable shaft. | 07-26-2012 |
20120189347 | CHARGE TRANSPORT MOLECULES AND METHOD FOR PREPARING SAME - A compound of the formula | 07-26-2012 |
20120201570 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER AND ELECTROPHOTOGRAPHIC APPARATUS - The present invention provides an electrophotographic photosensitive member having an a-SiC upper charge injection inhibition layer and an a-SiC surface layer, which is superior in adhesiveness, suppresses the surface deterioration, is superior in sensitivity characteristics and charging characteristics, and can keep an adequate image-forming capability for a long period of time. The upper charge injection inhibition layer contains 10 atom ppm or more and 30,000 atom ppm or less of the Group 13 atoms or the Group 15 atoms of the Periodic Table with respect to silicon atoms in the upper charge injection inhibition layer, and the ratio (C/(Si+C)) of the number of carbon atoms in the upper charge injection inhibition layer with respect to the sum of the number of silicon atoms and the number of the carbon atoms in the upper charge injection inhibition layer is 0.10 or more and 0.60 or less; and the sum of the atom density of the silicon atoms and the atom density of the carbon atoms in the surface layer is 6.60×10 | 08-09-2012 |
20120251175 | CARTRIDGE DRIVE SHAFT GEAR - Image recording devices, such as electrophotographic devices, laser printers, copiers, and fax machines, often have a cartridge that utilizes a drive gear to transmit rotational force from the printer to the print cartridge. Also, it is desirable to remanufacture print cartridge both to reduce waste and to save resources. Therefore, it may be desirable to provide a drive gear mechanism that is easily replaced or reused when a print cartridge is remanufactured. | 10-04-2012 |
20120269548 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus and an image forming method are provided that realize both the use of a decolorizing toner and a non-decolorizing toner and miniaturization of the apparatus. | 10-25-2012 |
20120321348 | IMAGE BEARING DRUM, IMAGE FORMING APPARATUS, IMAGE FORMING METHOD, AND PROCESS CARTRIDGE - An image bearing drum having a hollow cylinder sleeve member; a photosensitive layer; a protective layer having fillers; and flange members, each of which has an attachment unit, a shaft hole unit, and a linking unit, wherein the surface of the protective layer having waviness has an arithmetical mean deviation of an assessed profile Wa (μm) of from 0.050 μm to 0.400 μm and a mean width of profile elements WSm (mm) of from 0.500 mm to 1.500 mm, and wherein the linking unit has at least one shock-absorbing hole located on a virtual line segment drawn to the shaft hole unit from the circumference of a virtually projected circle formed by projecting the outer periphery of the attachment unit axially along the shaft onto a virtual plane that contains the linking unit and is orthogonal to the shaft direction. | 12-20-2012 |
20120321349 | LATENT-IMAGE MEASURING DEVICE AND LATENT-IMAGE CARRIER - A latent-image measuring device that measures the state of a photoconductor. The latent-image measuring device emits a charged-particle beam to the photoconductor to detects a charged-particle signal obtained through the emission of the charged-particle beam. The latent-image measuring device then exposes the photoconductor a plurality of times to form electrostatic latent images on the photoconductor, and measures an amount of change in latent-image depth while changing a time interval between a plurality of exposures. | 12-20-2012 |
20130028636 | APPARATUS AND METHODS FOR DELIVERY OF A FUNCTIONAL MATERIAL TO AN IMAGE FORMING MEMBER - The presently disclosed embodiments relate generally to an image forming apparatus comprising: a) an imaging member, b) a bias charging roller in contact with the surface of the imaging member, and c) a delivery unit in contact with the surface of the bias charge roller, wherein the delivery unit is fabricated as a polymer matrix impregnated with functional materials, such that the functional material is transferred onto the imaging member from the delivery unit via the bias charging roller. Embodiments also pertain to an improved electrophotographic imaging member comprising a very thin outer layer on the imaging member surface, where the outer layer comprises functional materials, such as paraffin, that act as a lubricant and or a barrier against moisture and/or surface contaminants. The improved imaging member exhibits improved xerographic performance, such as reduced friction and deletions in high humidity conditions. | 01-31-2013 |
20130028637 | COMPOSITION FOR USE IN AN APPARATUS FOR DELIVERY OF A FUNCTIONAL MATERIAL TO AN IMAGE FORMING MEMBER - The presently disclosed embodiments relate generally to an image forming apparatus comprising a delivery member in contact with either the surface of an imaging member or in contact with the surface of the bias charge roller, wherein the delivery member is fabricated as a polymer matrix impregnated with functional materials, such that the functional material is transferred onto the imaging member or bias charge roller from the delivery member. Embodiments also pertain to an improved electrophotographic imaging member comprising a very thin outer layer on the imaging member surface, where the outer layer comprises functional materials, such as paraffin, that act as a lubricant and/or a barrier against moisture and/or surface contaminants. The improved imaging member exhibits improved xerographic performance, such as reduced torque, reduced friction, and deletions in high humidity conditions. | 01-31-2013 |
20130064573 | Universal Part for Use In An Image Recording Apparatus - Disclosed is a universal OPC drum that allows a remanufacturer to stock a minimum number of OPC drum sleeves of the various sizes and then add the appropriate gear for the desired cartridge at the time of cartridge remanufacture. The inventory of gears for the various cartridges is easier to store and permits a remanufacturer to be more flexible. A universal hub may also include an electrical contact on each end to maintain universality without regard to whether the OEM contact is mounted on the drive or non-drive side of the OPC drum. | 03-14-2013 |
20130108323 | PHOTOCONDUCTIVE FOIL SHEET APPLICATOR | 05-02-2013 |
20130114975 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER AND ELECTROPHOTOGRAPHIC APPARATUS - In an electrophotographic photosensitive member having a photoconductive layer and, provided on the photoconductive layer, a surface layer constituted of a hydrogenated amorphous silicon carbide, the ratio of the number of atoms of carbon atoms (C) to the sum of the number of atoms of silicon atoms (Si) and number of atoms of carbon atoms (C), C/(Si+C), in the surface layer is from 0.61 or more to 0.75 or less, and the sum of atom density of the silicon atoms and atom density of the carbon atoms in the surface layer is 6.60×10 | 05-09-2013 |
20130230338 | FLANGE MEMBER, PHOTOSENSITIVE DRUM, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD - A disclosed flange member includes a press-fitted portion to be press-fitted in an axial end-opening portion of a hollow and cylindrical sleeve member; an axle opening portion including an axle opening into which a shaft member is inserted when the press-fitted portion is press-fitted in the end-opening portion; and a linking portion extending in a direction parallel to a circular cross section of the sleeve member and connecting the axle opening portion to the press-fitted portion. The linking portion includes a stress-absorbing portion that is deformed so as to absorb stress to which an outer peripheral surface of the press-fitted portion is subjected upon contact with an inner peripheral surface of the sleeve member when the press-fitted portion is press-fitted in the end-opening portion, thus preventing the stress from being transmitted to the axle opening portion via the linking portion. | 09-05-2013 |
20130236211 | PHOTOSENSITIVE DRUM ASSEMBLY AND PROCESS CARTRIDGE - A photosensitive drum assembly and a process cartridge and a process cartridge having an improved structure in which a protrusion for receiving a driving force transmitted from a main body of an image forming apparatus may not be easily worn or damaged. The photosensitive drum assembly that is capable of being combined with a driving shaft including a twisted hole with a non-circular cross-section having a plurality of corners, includes: a support disposed at one side of the photosensitive drum; and an insertion body disposed at one side of the support and including a plurality of protrusions that are capable of being inserted in the twisted hole, wherein at least portions of each of the plurality of protrusions based on a cross-section of each protrusion that is perpendicular to the driving shaft, closely contacts two side surfaces of the twisted hole that constitute one of the plurality of corners of the twisted hole, respectively. | 09-12-2013 |
20130236212 | OXIDE MATERIAL, ELECTROPHOTOGRAPHIC PHOTORECEPTOR, PROCESS CARTRIDGE, AND IMAGE FORMING DEVICE - An oxide material including gallium, zinc and oxygen, a ratio of the number of atoms of zinc to the number of atoms of gallium (number of atoms of zinc/number of atoms of gallium) being from about 0.01 to about 0.6 and a ratio of the number of atoms of oxygen to the sum of the number of atoms of gallium and the number of atoms of zinc (number of atoms of oxygen/(number of atoms of gallium+number of atoms of zinc)) being from about 1.0 to about 1.6, is disclosed. An electrophotographic photoreceptor including a layer which includes the oxide material is also disclosed. An electrophotographic photoreceptor including a substrate; and a photosensitive layer including gallium, oxygen and zinc is also disclosed. | 09-12-2013 |
20130236213 | ELECTRO-CONDUCTIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - To suppress an excessive reduction in resistance of an electro-conductive roller under an H/H environment and reduce a resistance value thereof under an L/L environment, provided is an electro-conductive member for electrophotography, comprising: an electro-conductive mandrel; and an electro-conductive layer provided on a periphery of the mandrel, wherein the electro-conductive layer contains a binder resin having an alkylene oxide structure, and a sulfo or a quaternary ammonium group as an ion exchange group, and an ion having polarity opposite to polarity of the ion exchange group, a water content of the electro-conductive layer under a temperature of 30° C. and a relative humidity of 80% is 10 mass % or less, and a spin-spin relaxation time of the electro-conductive layer, which is determined by pulse NMR measurement with a hydrogen core being a measurement core under a temperature of 15° C. and a relative humidity of 10%, is 200 μsec or more. | 09-12-2013 |
20130243483 | PHOTORECEPTOR, METHOD FOR PREPARING PHOTORECEPTOR, AND IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE USING THE PHOTORECEPTOR - In a photoreceptor including an electroconductive substrate; a photosensitive layer; and a protective layer, the protective layer includes a crosslinked resin having a residual group of a polycarboxylic acid compound and a group having the below-mentioned formula (10), and at least one of a compound having the below-mentioned formula (2) and a compound having the below-mentioned formula (3). | 09-19-2013 |
20130243484 | IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE - An image forming apparatus including an image bearing member having a surface layer A having a surface hardness of 200 N/mm | 09-19-2013 |
20130266343 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE BODY - An object of the present invention is to provide an electrophotographic photosensitive body having improved electrophotographic characteristics such as sensitivity and residual potential and also having excellent durability. The present invention provides an electrophotographic photosensitive body having a layer containing at least one specific p-terphenyl compound and at least one polycarbonate resin represented by the general formula (I): | 10-10-2013 |
20130287441 | PROCESS FOR PRODUCING END MEMBER, PROCESS FOR PRODUCING PHOTO CONDUCTOR DRUM UNIT, END MEMBER, AND PHOTO CONDUCTOR DRUM UNIT - There is provided a process for producing an end member capable of improving adhesiveness without not always requiring grooves or rough surfaces at a fitting portion of the end member, at the time of joining a photo conductor drum having an aluminum-made or aluminum alloy-made substrate and a crystalline resin-made end member with an adhesive. A process for producing an end member to be mounted on an end portion of a photo conductor drum and formed of a material including a crystalline resin, wherein the end member has a fitting portion to be fitted to the end portion of the photo conductor drum and the process has a step of subjecting at least an outer surface of the fitting portion to an oxidation treatment. | 10-31-2013 |
20130330104 | PHOTORECEPTOR, IMAGE FORMING APPARATUS, PROCESS CARTRIDGE, AND IMAGE FORMING METHOD - A photoreceptor includes an electroconductive substrate, and a laminate structure formed of at least a charge generating layer and a charge transport layer and provided overlying the electroconductive substrate, wherein the charge transport layer contains a charge transport material, a compound represented by the following formula 1 and a compound represented by the following formula 2: | 12-12-2013 |
20140003840 | PHOTOSENSITIVE DRUM AND IMAGE FORMING APPARATUS HAVING THE SAME | 01-02-2014 |
20140044456 | CONDUCTIVE SUPPORT FOR ELECTROPHOTOGRAPHIC PHOTORECEPTOR, ELECTROPHOTOGRAPHIC PHOTORECEPTOR, IMAGE FORMING APPARATUS, AND PROCESS CARTRIDGE - A conductive support for an electrophotographic photoreceptor contains aluminum, in which the conductive support has a Young's modulus of from 32,000 MPa to 55,000 MPa. | 02-13-2014 |
20140072341 | CHARGE TRANSPORTING FILM, PHOTOELECTRIC CONVERSION DEVICE, ELECTROPHOTOGRAPHIC PHOTORECEPTOR, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A charge transporting film includes a cured film of a composition containing at least one selected from reactive compounds represented by the following Formula (I): | 03-13-2014 |
20140079435 | NOVEL REACTIVE COMPOUND, CHARGE TRANSPORTING FILM, PHOTOELECTRIC CONVERSION DEVICE, ELECTROPHOTOGRAPHIC PHOTORECEPTOR AND METHOD OF PRODUCING THE SAME, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - Provided is a reactive compound represented by the following General Formula (I): | 03-20-2014 |
20140093280 | POSITIVELY-CHARGED SINGLE-LAYER ELECTROPHOTOGRAPHIC PHOTORECEPTOR AND IMAGE FORMING APPARATUS - Disclosed is a positively-charged electrophotographic photoreceptor which uses a tubular photosensitive layer support base with a wall thickness of (t), wherein (t) is 0.7 mm or less, a chamfer angle (a) of an end surface of the photosensitive layer support base is 30° or more and 60° or less with respect to a longitudinal tangent of a surface of a tubular photosensitive layer support base, and an outer end surface-tail edge surface width (b) of the tubular photosensitive layer support base is 0.05 mm or more. | 04-03-2014 |
20140093281 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - An electrophotographic photosensitive member in which image deletion is hardly produced, and a process cartridge and electrophotographic apparatus having the electrophotographic photosensitive member are provided. For this, a surface of the electrophotographic photosensitive member includes a plurality of depressed portions and a portion other than the depressed portions, each of the depressed portions having a depth of 0.5 to 5 μm and an opening longest diameter of 20 to 80 μm; when a 500 μm×500 μm square region is disposed in an arbitrary position of the surface of the electrophotographic photosensitive member, the area of the depressed portions in the 500 μm×500 μm square region is from 10000 to 90000 μm | 04-03-2014 |
20140147170 | IMAGE CARRIER, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - An image carrier includes a tubular image carrier body to carry an image on an outer circumferential surface thereof, a shaft disposed inside the image carrier body, a first flange mounted on the shaft, and a second flange spaced apart from the first flange in an axial direction of the image carrier and mounted on the shaft. Each of the first flange and the second flange includes a through-hole contacting the shaft, a first engagement portion to engage a lateral end of the image carrier body in the axial direction of the image carrier, and a second engagement portion, constituting at least a part of the through-hole, to engage the shaft. The second engagement portion is disposed inboard from the first engagement portion in the axial direction of the image carrier. | 05-29-2014 |
20140178100 | ELECTROSTATIC IMAGE DEVELOPER AND IMAGE FORMING APPARATUS - An electrostatic image developer includes a toner containing an external additive having a volume-average particle size of about 80 to 400 nm and an average circularity of about 0.7 to 0.85. The developer is used in an image forming apparatus including an image-carrying member having a top surface layer containing fluorocarbon resin particles, and a developer-carrying member that faces the image-carrying member and carries an electrostatic image developer, in which a value obtained by dividing the amount of developer on the developer-carrying member [g/m | 06-26-2014 |
20140212174 | ROTARY POWER TRANSMISSION MECHANISM FOR TRANSMITTING ROTARY POWER FROM A SHAFT TO A CYLINDRICAL MEMBER WHILE SUPPRESSING SHIFTING OF THE CYLINDRICAL MEMBER DURING ROTATION, AND PHOTORECEPTOR DRUM DEVICE, DEVELOPING DEVICE, FIXING DEVICE, AND IMAGE FORMING DEVICE PROVIDED WITH THE ROTARY POWER TRANSMISSION MECHANISM - The rotary power transmission mechanism includes a flange member fitted to one end of a cylindrical member, a shaft inserted through an axial center of the flange member, and a pin member inserted through the shaft in a radial direction of the shaft. The flange member has a first contact portion and a second contact portion that have point symmetry with respect to an axial center of the shaft. When the pin member is rotated in one direction by the shaft rotating in the one direction, the first contact portion contacts a first end portion of the pin member and the second contact portion contacts a second end portion of the pin member. The pin member, when rotating in the one direction, pushes against the first contact portion and the second contact portion, rotates the flange member in the one direction, and thereby transmits rotary power to the cylindrical member. | 07-31-2014 |
20140219679 | IMAGE FORMING APPARATUS - There is described an image forming apparatus that includes an imaging member having a charge retentive-surface for developing an electrostatic latent image thereon. The imaging member includes a substrate and photoconductive member disposed on the substrate. The image forming apparatus includes a charging unit for applying an electrostatic charge on the imaging member to a predetermined electric potential wherein the charging unit is spaced from the photoconductive member a distance of from about 3 μm to about 300 μm. The image forming apparatus includes a delivery member in contact with the surface of the photoconductive member. The delivery member includes an elastomeric matrix impregnated with a liquid lubricant wherein the delivery member applies a layer of liquid lubricant to the surface of the photoconductor wherein in the layer has a thickness of from about 1 nm to about 15 nm during steady state operation. | 08-07-2014 |
20140219680 | IMAGE FORMING APPARATUS - An image forming apparatus includes a charging roller including elastic and surface layers and a photoconductor drum. Initially, the surface layer has a surface roughness Rz of 3-6 μm, and the layers have an impedance ratio of 0.81 or less in absolute value at a frequency of 800-3000 Hz. After a predetermined time, the surface roughness Rz is reduced by a decrement ΔRz of 0.1-4 μm. The drum has a film thickness D initially ranging from 20-40 μm and reduced by a decrement ΔD of 5-25 μm after the predetermined time. Herein, 0.005≦ΔRz/ΔD≦0.8 holds. The impedance ratio is represented as ZE/(ZE+ZS) wherein ZE and ZS represent the respective impedances of the elastic layer and the surface layer, and 100 k A4-size recording media recorded with images with an area coverage of 7% are printed in the predetermined time. | 08-07-2014 |
20140233983 | ELECTROPHOTOGRAPHIC PHOTORECEPTOR - An electrophotographic photoreceptor is removably installed and used in a device main unit of an electrophotography application device so as to form a process cartridge. The device main unit includes a driving-side power transmission portion. The photoreceptor includes a photosensitive drum including a cylindrical conductive base having a photosensitive layer containing a photoconductive material. A flange is fitted to the photosensitive drum. The flange includes a driven-side driving force transmission portion that has a cylindrical member and engaging protrusions. The flange transmits to the photosensitive drum a rotational driving force from the driving-side power transmission portion. A center of the cylindrical member is disposed on a central axis of the photosensitive drum. The protrusions are parallel to the central axis at positions on the outer periphery of the cylindrical member that trisect the cylindrical member. Each protrusion protrudes in a radial direction and engages the driving-side power transmission portion. | 08-21-2014 |
20140294443 | IMAGE FORMING SYSTEM - The presently disclosed embodiments relate generally to image forming systems comprising imaging apparatus members and toner compositions. More specifically, the present embodiments relate to an improved BCR xerographic system comprising (1) a cleaning blade comprising a material having a certain Share A Hardness; (2) a photoreceptor having a surface with a specified Young's Modulus and; and (3) a toner lubricant additive. The combined system demonstrates a significant increase an overall service life of the system. | 10-02-2014 |
20140341612 | END-SIDE MEMBER, PHOTORECEPTOR DRUM UNIT AND PROCESS CARTRIDGE - There is provided an end-side member to be arranged at an end of a photoreceptor drum unit which is detachably attached to an image forming apparatus body, the image forming apparatus body including a drive shaft having a concave portion, the concave portion being a hole having a substantially triangular cross-sectional shape and twisted in an extending direction of an axial line of the drive shaft. The end-side member includes a convex-shaped bearing member which is engageable with and disengageable from the concave portion. A depression to be engaged with a rim of an opening of the concave portion is formed in at least a part of an outer circumferential surface of the bearing member. | 11-20-2014 |
20140369715 | ELECTROPHOTOGRAPHIC PHOTORECEPTOR, METHOD FOR MANUFACTURING THE PHOTORECEPTOR, AND ELECTROPHOTOGRAPHIC APPARATUS INCLUDING THE PHOTORECEPTOR - A photoreceptor for electrophotography includes a photosensitive layer provided on a conductive substrate that contains at least a resin binder, a charge transport material, and an additive. The photoreceptor exhibits high photoresponsivity, stable electrical properties regardless of repeated use thereof, and high durability. The resin binder contains a polycarbonate resin composed of a copolymer having structural units expressed by general formulae (1) and (2) below. The charge transport material contains at least one type of stilbene compound expressed by general formulae (3), (4), and (5) below. The additive contains at least one type of diester compound expressed by general formula ( | 12-18-2014 |
20150016841 | ELECTROPHOTOGRAPHY-BASED ADDITIVE MANUFACTURING SYSTEM WITH RECIPROCATING OPERATION - An additive manufacturing system for printing a three-dimensional part using electrophotography, the additive manufacturing system comprising a rotatable photoconductor component, first and second development stations configured to develop layers of materials on a surface of the rotatable photoconductor component while the rotatable photoconductor component rotates in opposing rotational directions, and a platen configured to operably receive the developed layers in a layer-by-layer manner to print the three-dimensional part from at least a portion of the received layers. | 01-15-2015 |
20150037069 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER AND IMAGE FORMING APPARATUS - An electrophotographic photosensitive member containing a terphenoquinone derivative represented by the following formula (1): | 02-05-2015 |
20150078783 | CONTACT MEMBER, IMAGE CARRIER, AND IMAGE FORMING APPARATUS - A contact member is fitted in a cylindrical body that is substantially cylindrical and configurates an image carrier, and is supported by the cylindrical body while being in contact with an inner peripheral surface of the cylindrical body at contact portions provided in three areas in a circumferential direction of the cylindrical body. All angles formed by two of straight lines passing through the contact portions and an axial center of the cylindrical body are more than about 90 degrees in a state in which the contact member is supported within the cylindrical body, when viewed from an axial direction of the cylindrical body. | 03-19-2015 |
20160011528 | ELECTROPHOTOGRAPHIC PHOTORECEPTOR AND IMAGE FORMATION DEVICE | 01-14-2016 |
20160018746 | ELECTROPHOTOGRAPHIC PHOTORECEPTOR, ELECTROPHOTOGRAPHIC PHOTORECEPTOR CARTRIDGE, AND IMAGE FORMATION DEVICE - An electrophotographic photoreceptor comprising at least a photosensitive layer on a conductive support, wherein the photosensitive layer contains a specific compound and a specific charge-transporting substance. | 01-21-2016 |
20160026143 | CONTACT MEMBER, IMAGE HOLDING MEMBER, AND IMAGE FORMING APPARATUS - Provided is a contact member that comes in contact with an inner surface of a cylindrical member being rotated to press against the inner surface, is supported within the cylindrical member, is provided along the inner surface when viewed in an axial direction of the cylindrical member while being supported by the cylindrical member, has an arc shape in which both ends thereof face each other, and has first thin-wall regions which are respectively formed at both ends thereof in a circumferential direction to have thicknesses lower than thicknesses of other regions. | 01-28-2016 |
20160054667 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - A process cartridge includes an electrophotographic photosensitive member and a gap retaining member, wherein the electrophotographic photosensitive member includes a first region having an undercoat layer, a charge generating layer, and a charge transporting layer on a support in this order and a second region having an undercoat layer and a charge transporting layer on a support in this order, the undercoat layer contains a metal oxide particle and any one of an urethane resin, an amino resin, and a polyamide resin as a binder resin, and the charge transporting layer contains a charge transporting substance and at least one selected from the group consisting of a polycarbonate resin and a polyester resin, and wherein the gap retaining member comes into contact with a surface of the second region of the electrophotographic photosensitive member. | 02-25-2016 |
20160083579 | FLAME RETARDANT COMPOSITION - A flame retardant composition contains the flame retardant described in Claim | 03-24-2016 |
20160091806 | ELECTROPHOTOGRAPHIC PHOTORECEPTOR AND IMAGE FORMING APPARATUS - The invention provides an image forming apparatus and an electrophotographic photoreceptor, comprising: a conductive support; and at least a charge generation layer and a charge transport layer on the conductive support, wherein said charge generation layer contains a hydroxygallium phthalocyanine synthesized using a halogen solvent, said charge transport layer contains a polyester resin having a specific structural unit, and said charge transport layer is formed using a non-halogen solvent. | 03-31-2016 |
20160109844 | Unit Frame Having Grip Part - An image forming unit includes a cartridge and a unit frame. The cartridge has a cartridge-grip. The unit frame is configured to accommodate the cartridge. The unit frame includes a first plate, a second plate, a first beam, and a second beam. The first plate has a through hole. The first beam extends between the first plate and the second plate. The first beam includes a frame-grip disposed between an upper end of the first beam and a lower end of the first beam. The second beam extends between the first plate and the second plate. When the cartridge is accommodated in the unit frame, a distance between the lower end of the first beam and an upper end of the frame-grip is smaller than a distance between the lower end of the first beam and an upper end of the cartridge-grip. | 04-21-2016 |
20160124327 | ELECTROPHOTOGRAPHIC PHOTORECEPTOR, ELECTROPHOTOGRAPHIC PHOTORECEPTOR CARTRIDGE, IMAGE FORMING APPARATUS, AND POLYARYLATE RESIN - An electrophotographic photoreceptor comprises a conductive support and, at least a photosensitive layer on the conductive support, wherein the photosensitive layer includes a polyarylate resin and the polyarylate resin has a repeating structure represented by formula (1), and the amount of bisphenol residues represented by formula (3) after the polyarylate resin is hydrolyzed, is 0.2% to 1%, in terms of intensity ratio, based on the total amount of bisphenol residues represented by formula (2) and formula (3) after the polyarylate resin is hydrolyzed, the bisphenol residues being detected with a gas chromatograph employing a hydrogen flame ionization detector (FID). | 05-05-2016 |
20160154324 | ELECTROPHOTOGRAPHIC APPARATUS, PROCESS CARTRIDGE, AND IMAGE FORMING METHOD | 06-02-2016 |
20160187792 | PHOTOCONDUCTOR, IMAGE-FORMING APPARATUS, AND CARTRIDGE - A photoconductor is used for an image-forming apparatus, and the photoconductor has a surface including irregularities having an arithmetic average roughness of 0.1 μm or more and 0.5 μm or less in a cycle length from 867 to 1,654 μm. | 06-30-2016 |
20160195824 | ELECTROPHOTOGRAPHIC PHOTORECEPTOR AND IMAGE FORMING APPARATUS INCLUDING THE SAME | 07-07-2016 |
20160252831 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, ELECTROPHOTOGRAPHIC APPARATUS, CHARGE TRANSPORT LAYER FORMING COATING LIQUID, AND METHOD FOR MANUFACTURING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER | 09-01-2016 |