Electrically Insulating Overlayer Patents (Class 430/67)
  • Patent number: 10121901
    Abstract: A pixel structure including an active device, a first protection layer, a first electrode, an isolator, a second protection layer and a second electrode is provided. The active device includes a gate, a source and a drain. The first protection layer covers the active device and has a first opening above the drain. The first electrode is disposed above the first protection layer. The first electrode has a side wall corresponding to the first opening. The isolator covers the side wall of the first electrode. The second protection layer covers the first electrode. The second electrode is disposed on the second protection layer, electrically connected to the drain through the first opening, and electrically isolated from the first electrode by the second protection layer and the isolator.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: November 6, 2018
    Assignee: Au Optronics Corporation
    Inventors: Fu-Chun Tsao, Kuo-Yu Huang, Maw-Song Chen
  • Patent number: 9871160
    Abstract: A photodetector is described along with corresponding materials, systems, and methods. The photodetector comprises an integrated circuit and at least two optically sensitive layers. A first optically sensitive layer is over at least a portion of the integrated circuit, and a second optically sensitive layer is over the first optically sensitive layer. Each optically sensitive layer is interposed between two electrodes. The two electrodes include a respective first electrode and a respective second electrode. The integrated circuit selectively applies a bias to the electrodes and reads signals from the optically sensitive layers. The signal is related to the number of photons received by the respective optically sensitive layer.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: January 16, 2018
    Assignee: INVISAGE TECHNOLOGIES, INC.
    Inventors: Hui Tian, Edward Sargent
  • Patent number: 9086318
    Abstract: Approaches enable a component such as a camera of a computing device to be collocated, or otherwise placed in proximity under the same cover sheet of material with an light source. A cover sheet can include a transmissive barrier positioned therein. The transmissive barrier can include at least one of a light scattering or light blocking feature. A light source and camera sensor can be positioned on a same side of the cover sheet and the transmissive barrier can be positioned between the light source and the camera such that light reflected from the light source by a portion of the cover sheet towards the camera is at least scattered, refracted, diffracted, blocked, or otherwise reduced using a determined pattern, layer, or other such feature in order to reduce an amount of light of the light source that is reflected from a surface or feature of the cover sheet and is detected by the camera.
    Type: Grant
    Filed: May 15, 2013
    Date of Patent: July 21, 2015
    Assignee: AMAZON TECHNOLOGIES, INC.
    Inventor: Leo Benedict Baldwin
  • Patent number: 8574797
    Abstract: An electrophotographic photoconductor includes a base, an undercoat layer that contains a metal oxide and an electron-accepting material and has a thickness of about 3 ?m or more and about 15 ?m or less, and a photosensitive layer containing a polymer having a repeating unit represented by general formula (1) where R1 and R2 each independently represent a halogen atom, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 5 to 7 carbon atoms, or an aryl group having 6 to 12 carbon atoms; and m and n each independently represent an integer of 0 to 4.
    Type: Grant
    Filed: August 18, 2010
    Date of Patent: November 5, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Shigeto Hashiba, Kazuhiro Koseki, Satoya Sugiura, Kenta Ide, Fuyuki Kano
  • Patent number: 8557486
    Abstract: 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.
    Type: Grant
    Filed: November 18, 2009
    Date of Patent: October 15, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Takeshi Ishida, Hirofumi Hayata, Masahiko Kurachi, Toshiyuki Fujita, Seisuke Maeda, Seijiro Takahashi
  • Publication number: 20130244150
    Abstract: An electrophotographic photoreceptor, including an electroconductive substrate; a photosensitive layer overlying the electroconductive substrate; and a surface layer overlying the photosensitive layer, wherein the surface layer includes a resin having no charge transportability; and an inorganic particulate material, wherein the inorganic particulate material is a zinc oxide doped with a boron group, and wherein the electrophotographic photoreceptor has a surface specific resistivity (R1) not less than 1013 ?/cm2 when the surface layer has an electric field intensity of 1×104 V/cm, and a ratio (R1/R15) of the surface specific resistivity (R1) to a surface specific resistivity (R15) when the surface layer has an electric field intensity of 1.5×105 V/cm of from 100 to 5,000.
    Type: Application
    Filed: March 5, 2013
    Publication date: September 19, 2013
    Inventors: Tetsuya Toshine, Hiroshi Ikuno, Naohiro Toda, Takafumi Iwamoto, Kazuhiro Egawa, Toshihiro Ishida
  • Patent number: 8492059
    Abstract: An electrophotographic photoreceptor, includes: a conductive support; and a photosensitive layer provided on or above the conductive support, the photosensitive layer including an outermost surface layer at the farthest location from the conductive support, wherein the outermost surface layer contains: coated insulating inorganic particles obtained by subjecting insulating inorganic particles having a specific surface area of not more than about 300 m2/g to a coating treatment with an aromatic functional group-containing compound; and fluorine-containing organic particles.
    Type: Grant
    Filed: October 20, 2009
    Date of Patent: July 23, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Shigeto Hashiba, Kazuhiro Koseki, Kaori Iemura, Kenta Ide, Satoya Sugiura, Fuyuki Kano, Kazuyuki Nakamura
  • Patent number: 8420284
    Abstract: An electrophotographic photoreceptor, including an electroconductive substrate; a photosensitive layer, located overlying the electroconductive substrate; and an outermost layer comprising a convexity, wherein each of the outermost layer and the convexity includes a crosslinked body including a structural unit having a same charge transportable structure, and wherein the number of convexity having a height not less than ½×RzJIS is from 30 to 300 in a measurement length of 12 mm, wherein RzJIS is an average of ten-point mean roughness specified in JIS B0601 of 2001 and measured at least 4 random positions in an area the outermost layer is formed on, and wherein the height of the convexity is a distance from the deepest valley to a top of the convexity in the measurement length of 12 mm.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: April 16, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Kohichi Ohshima, Hidetoshi Kami, Yukio Fujiwara, Kazuhiro Egawa
  • Patent number: 8404415
    Abstract: Disclosed is an electrophotographic photoreceptor including: an electroconductive substrate; a photosensitive layer arranged on or above the electroconductive substrate; and a surface layer arranged on or above the photosensitive layer, and containing about 90% or more by atom of gallium (Ga), oxygen (O) and hydrogen (H), and having an atomic number density of about 7.8×1022 cm?3 or more.
    Type: Grant
    Filed: August 18, 2009
    Date of Patent: March 26, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Takeshi Iwanaga, Shigeru Yagi, Nobuyuki Torigoe
  • Publication number: 20130052577
    Abstract: A photoconductor that includes an optional anticurl layer, optional supporting substrate, an optional ground plane layer, an optional hole blocking layer, an optional ground strip segment, an optional adhesive layer, a photogenerating layer, and a charge transport layer that contains an acrylonitrile-butadiene-styrene polymer.
    Type: Application
    Filed: August 22, 2011
    Publication date: February 28, 2013
    Applicant: XEROX CORPORATION
    Inventor: Jin WU
  • Patent number: 8367287
    Abstract: An electrophotographic photoconductor of the invention comprising: an conductive support; a light-sensitive layer formed on the conductive support and containing a charge generating material and a charge transport material; and a surface protective layer formed on the light-sensitive layer and made of a resin composition, wherein the resin composition constituting the surface protective layer contains an amine compound represented by the following formula (1): wherein R1 and R2 are, the same or different, each an alkyl group or an allyl group which may have a substituent or a heterocyclic residue to be formed through or not through a nitrogen atom or an oxygen atom together with the nitrogen atom to which R1 and R2 are bonded, R3 and R4 are, the same or different, each an alkyl group having a substituent and n denotes 1 or 2, provided that when n is 1, X is a hydrogen atom, a halogen atom, or an alkyl group, a hydroxyl group or a mercapto group which may have a substituent, or a ring optionally containing
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: February 5, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiroshi Sugimura, Kotaro Fukushima, Koichi Toriyama
  • Patent number: 8343700
    Abstract: The presently disclosed embodiments relate in general to electrostatography comprising improved features in the flexible imaging member that enhance function when used in the electrostatographic imaging system. These embodiments pertain, more particularly, to a structurally simplified curl-free flexible electrostatographic imaging member belt containing a stress/strain free ground strip layer and stress/strain free imaging layer(s) to improve dynamic belt cyclic motion quality and extend service life.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: January 1, 2013
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Stephen T. Avery, Yuhua Tong, Michael S. Roetker, Jimmy E. Kelly, Kyle B. Tallman
  • Patent number: 8263301
    Abstract: 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.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: September 11, 2012
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Stephen T. Avery, Kathleen M. Carmichael
  • Patent number: 8173344
    Abstract: The present invention provides an electrophotographic photosensitive member in which a photoconductive layer is an amorphous layer that contains a silicon atom as a main component, and a surface layer contains an aluminum atom, a zinc atom and an oxygen atom so as to satisfy Expression (1) and Expression (2): 3.0?100{y/(x+y)}?7.0??(1), and 1.05?z/(1.50x+y)?1.20??(2), in Expression (1) and Expression (2), x represents atom % of the aluminum atom contained in the surface layer, y represents atom % of the zinc atom contained in the surface layer, and z represents atom % of the oxygen atom contained in the surface layer.
    Type: Grant
    Filed: July 16, 2009
    Date of Patent: May 8, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuyoshi Akiyama, Tomohito Ozawa, Yuu Nishimura
  • Patent number: 8098925
    Abstract: The presently disclosed embodiments relate in general to electrophotographic imaging members, such as layered photoreceptor structures, and processes for making and using the same. More particularly, the embodiments pertain to an improved photoreceptor that exhibits little to no response to injected charges and demonstrates excellent ghosting properties.
    Type: Grant
    Filed: November 12, 2008
    Date of Patent: January 17, 2012
    Assignee: Xerox Corporation
    Inventors: Markus R. Silvestri, Jin Wu, M. John Hinckel, David M. Skinner, Kent J. Evans, Robert J. Meyer, Kathleen M. Carmichael, Dale S. Renfer
  • Publication number: 20110318675
    Abstract: The presently disclosed embodiments are directed to layer(s) that are useful in imaging apparatus members and components, for use in electrophotography, including digital, apparatuses. More particularly, the present embodiments provide the negatively charged electrophotographic imaging members with a novel cross-linked charge blocking undercoat layer, which is created to comprise of a binary composition of melamine and formaldehyde or a triple composition consisting of a hydroxyl functional acrylic polyol binder and a methylolation of melamine-formaldehyde, and methods for making the same. The charge blocking layer provides stabilized cyclic photo-electrical properties, enhanced mechanical adhesion bonding, and improved copy print out quality for service life extension.
    Type: Application
    Filed: June 25, 2010
    Publication date: December 29, 2011
    Applicant: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Yuhua Tong, Min-Hong Fu, Stephen T. Avery
  • Patent number: 8084170
    Abstract: An object of the present invention is to provide an electrophotographic photoconductor having an extremely low increase in friction coefficient and wear, while also having superior cleanability even after long-term or large-volume printing, and to provide an electrophotographic apparatus for forming an image using a polymerization toner without providing a unit for externally supplying a lubricant to a photoconductor. Namely, the present invention provides an electrophotographic photoconductor having a photosensitive layer and a crosslinked resin surface layer over a conductive substrate, wherein the crosslinked resin surface layer at least contains trimethylolpropane triacrylate, a dimethylpolysiloxane having a radically polymerizable functional group, and lubricating fine particles.
    Type: Grant
    Filed: March 12, 2008
    Date of Patent: December 27, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Hidetoshi Kami, Tetsuro Suzuki, Hiroshi Tamura, Hiroshi Ikuno, Yukio Fujiwara, Takafumi Iwamoto
  • Patent number: 7960082
    Abstract: Disclosed is an electrophotographic imaging member including a substrate; a charge generating layer; a charge transport layer with a hole transport material; and a protective overcoat layer having a silicone polyether additive with at least one carbinol function group; a polyol binder; a hole transport material; a curing agent; and an acid catalyst.
    Type: Grant
    Filed: November 27, 2007
    Date of Patent: June 14, 2011
    Assignee: Xerox Corporation
    Inventors: Hany Aziz, Kathy L. De Jong, Nan-Xing Hu, Jennifer A. Coggan, Johann Junginger, Ah-Mee Hor
  • Patent number: 7951517
    Abstract: An electrophotographic photoreceptor includes an organic photosensitive layer and one or more inorganic thin film layers disposed in this order on a conductive substrate, in which among the one or more inorganic thin film layers at least an inorganic protective layer disposed directly on the organic photosensitive layer has cracks scattered at intervals from about 1 ?m to about 10 mm. The inorganic thin film layer having the cracks is a first protective layer and an inorganic thin film is grown on a surface of the first protective layer to form a second protective layer.
    Type: Grant
    Filed: February 27, 2008
    Date of Patent: May 31, 2011
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Takeshi Iwanaga, Shigeru Yagi
  • Patent number: 7858278
    Abstract: An electrophotographic photoreceptor is provided, including an electroconductive substrate and a photosensitive layer located overlying the electroconductive substrate, wherein an outermost layer of the electrophotographic photoreceptor includes a resin including a graft copolymer in which a monomer having a polar group is graft polymerized to a polycarbonate resin, a polyarylate resin, or a copolymer thereof, and a filler; along with an image forming apparatus and a process cartridge using the electrophotographic photoreceptor.
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: December 28, 2010
    Assignee: Ricoh Company Limited
    Inventors: Hiroshi Ikuno, Masafumi Ohta, Tomoyuki Shimada, Yuuji Tanaka, Hongguo Li
  • Patent number: 7799497
    Abstract: A photoconductor containing an optional supporting substrate, a silanol containing photogenerating layer, at least one charge transport layer, and a top overcoating layer in contact with and contiguous to the charge transport layer.
    Type: Grant
    Filed: November 7, 2006
    Date of Patent: September 21, 2010
    Assignee: Xerox Corporation
    Inventors: John F Yanus, Jin Wu, Kenny-Tuan Dinh, Michael A. Morgan, Anthony M. Horgan
  • Patent number: 7754404
    Abstract: The presently disclosed embodiments are directed to overcoat layers useful in electrostatography. More particularly, the embodiments pertain to an electrostatographic imaging member with an improved overcoat layer including a polymeric binder that lowers the surface energy involved and reduces friction.
    Type: Grant
    Filed: December 27, 2005
    Date of Patent: July 13, 2010
    Assignee: Xerox Corporation
    Inventors: Satchidanand Mishra, Kathleen M. Carmichael, Anthony M. Horgan, Markus R. Silvestri, Satish Parikh, Edward F. Grabowski, Kenny-tuan Dinh, Richard L. Post, Donald J. Goodman
  • Patent number: 7749668
    Abstract: A photoconductor containing an optional supporting substrate, a photogenerating layer, at least one charge transport layer, and an overcoating layer in contact with and contiguous to the charge transport layer, and which overcoating layer includes a fluoroalkyl ester, and a polymer.
    Type: Grant
    Filed: March 23, 2007
    Date of Patent: July 6, 2010
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Steven D. Bush, Joseph A. Tumminelli, Lanhui Zhang, Lin Ma, Sherri A. Colon, John J. Wilbert
  • Patent number: 7742148
    Abstract: First pluralities of radiation spots generated by an array of individually controllable elements are exposed on a substrate. The radiation spots are equally spaced across an entire area of the substrate to be exposed. The substrate is then shifted relative to the array of individually controllable elements in a direction perpendicular to a scanning direction of the substrate. Second pluralities of radiation spots generated by the array of individually controllable elements are alternatingly formed on the substrate with respect to each of the first plurality of spots.
    Type: Grant
    Filed: June 8, 2005
    Date of Patent: June 22, 2010
    Assignee: ASML Netherlands B.V.
    Inventor: Pieter Johannes Marius Van Groos
  • Patent number: 7659044
    Abstract: A photoconductor comprising a photosensitive layer disposed on a support, wherein the photosensitive layer has a crosslinked layer and the crosslinked layer is produced by curing a dispersion in which at least one of an acryl-modified polyoraganosiloxane having a radical reactivity and an acryl-modified polyoraganosiloxane having an amine structure is dispersed in a radical polymerizable monomer.
    Type: Grant
    Filed: July 5, 2005
    Date of Patent: February 9, 2010
    Assignees: Ricoh Company, Ltd., Nissin Chemical Industry Co., Ltd.
    Inventors: Hongguo Li, Kazukiyo Nagai, Tetsuro Suzuki, Yasuo Suzuki, Harukazu Okuda, Masahide Hatanaka
  • Patent number: 7592111
    Abstract: An electrostatographic imaging member formulated with a liquid carbonate is provided. The imaging electrostatographic member exhibits improved service life.
    Type: Grant
    Filed: November 5, 2004
    Date of Patent: September 22, 2009
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Satchidanand Mishra, Anthony M. Horgan, Richard L. Post, Yuhua Tong, Edward F. Grabowski, Kathleen M. Carmichael, Markus R. Silvestri
  • Patent number: 7579125
    Abstract: An imaging member has a crosslinked overcoat layer which holds fluorinated nanoparticles. The overcoat layer is formed from an overcoat solution comprising a polymer binder; a hole transport molecule; fluorinated nanoparticles; a fluorinated surfactant; a crosslinking agent; and a free radical initiator. The overcoat layer provides excellent wear resistance at a low cost.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: August 25, 2009
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, Satchidanand Mishra, Anthony M. Horgan, Richard L. Post, Kathleen M. Carmichael, Edward F. Grabowski
  • Publication number: 20090208858
    Abstract: A photoconductor that includes, for example, a backing layer, a supporting substrate, a photogenerating layer, and a charge transport layer, and wherein the outermost layer of said backing layer is comprised of a self crosslinked acrylic resin and a crosslinkable siloxane component.
    Type: Application
    Filed: February 19, 2008
    Publication date: August 20, 2009
    Applicant: XEROX CORPORATION
    Inventors: Jin Wu, Lanhui Zhang, Lin Ma, Dale S. Renfer
  • Patent number: 7560205
    Abstract: A photoconductive imaging including at least a substrate, a charge generating layer, a charge transport layer, and an overcoat layer. The overcoat layer includes a crosslinked product of at least a phenolic resin and a phenol compound.
    Type: Grant
    Filed: August 31, 2005
    Date of Patent: July 14, 2009
    Assignee: Xerox Corporation
    Inventors: Yu Qi, Nan-Xing Hu, Cheng-Kou Hsiao
  • Patent number: 7529504
    Abstract: An image forming apparatus has an organic photoconductor having a surface layer containing fluorine-containing resin particles whose number average primary particle size is not less than 0.02 ?m and is less than 0.20 ?m; a charging device to charge by bring an charging member in contact with the organic photoconductor; a latent image forming device to for a latent image on the organic photoconductor; a developing device to visualize the latent image with toner and to form a toner image on the organic photoconductor; and a transferring device to transfer the toner onto a transfer material.
    Type: Grant
    Filed: July 22, 2005
    Date of Patent: May 5, 2009
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Keiichi Inagaki, Shigeaki Tokutake
  • Patent number: 7498110
    Abstract: There is provided an electrophotographic photosensitive member used in an electrophotographic apparatus which meets energy saving and higher image quality. The electrophotographic photosensitive member has excellent potential properties, and can suppress the image quality degradation caused by interference. The electrophotographic photosensitive member of the present invention including on a conductive substrate at least a photoconductive layer mainly composed of amorphous silicon, a surface layer, and at least one intermediate layer interposed between the photoconductive layer and the surface layer, wherein the surface layer contains a metal fluoride (exclusive of silicon fluoride) and the intermediate layer contains a metal oxide.
    Type: Grant
    Filed: June 22, 2005
    Date of Patent: March 3, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takahisa Taniguchi, Kazuyoshi Akiyama
  • Patent number: 7482106
    Abstract: An image forming method comprising steps of forming a toner image by developing by a toner a latent image on a photoreceptor comprised of a layer formed on a substrate, transferring the toner image onto a recording medium on which the toner image is recorded and fixing, wherein the average circular degree of the toner is not less than 0.94, and the toner contains a wax comprising an ester of a carboxylic acid having carbon atoms of not less than 16 or an ester of an alcohol having carbon atoms of not less than 16, and the layer is a layer to be contacted to the toner in the developing step and contains an inorganic fine particles having a number average of primary particle diameter of approximately not less than 1 nm and less than 100 nm.
    Type: Grant
    Filed: March 15, 2004
    Date of Patent: January 27, 2009
    Assignee: Konica Minolta Holdings, Inc.
    Inventors: Hideo Yoshizawa, Akihiko Itami
  • Patent number: 7442479
    Abstract: A photoreceptor including at least an electroconductive substrate, and a charge blocking layer, a moiré preventing layer, and a photosensitive layer, which are located overlying the electroconductive substrate in this order, wherein the photosensitive layer includes an azo pigment having a fluorenone skeleton. The photosensitive layer is preferably prepared by coating a coating liquid including a dispersion which is prepared by dispersing the azo pigment in a solvent to an extent such that the average particle diameter of the azo pigment is not greater than 0.3 ?m and the standard deviation of the particle diameter is not greater than 0.2 ?m, followed by filtering with a filter having an effective pore diameter not greater than 5 ?m. An image forming apparatus and a process cartridge including the photoreceptor.
    Type: Grant
    Filed: June 27, 2005
    Date of Patent: October 28, 2008
    Assignee: Ricoh Company, Limited
    Inventor: Tatsuya Niimi
  • Patent number: 7427440
    Abstract: An imaging member containing a substrate, and an outer layer containing a polyether lubricant, and an image forming apparatus for forming images on a recording medium including the imaging member above, a development component to apply a developer material to said charge-retentive surface to develop said electrostatic latent image to form a developed image on said charge-retentive surface; a transfer component for transferring said developed image from said charge-retentive surface to another member or a copy substrate; and a fusing member to fuse said developed image to said copy substrate.
    Type: Grant
    Filed: July 28, 2005
    Date of Patent: September 23, 2008
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Geoffrey M T. Foley, Liang-Bih Lin, Edward C. Savage, Robert P. Altavela, Marc J. Livecchi
  • Publication number: 20080107983
    Abstract: A photoconductor containing a thiophosphate photogenerating layer, and at least one charge transport layer, and a top polymeric overcoating layer in contact with and contiguous to a charge transport layer.
    Type: Application
    Filed: November 7, 2006
    Publication date: May 8, 2008
    Inventors: John F. Yanus, Jin Wu, Kenny-Tuan Dinh, Michael A. Morgan, Anthony M. Horgan, Kathleen M. Carmichael
  • Patent number: 7358017
    Abstract: A polyurethane-silica hybrid, or polyurethane-silica/silsesquioxane hybrid overcoat improves the life of the photoconductor drum without significantly altering the electrophotographic properties of the PC drum. Wear can be caused by a variety of factors, which include contact with the cleaner blade, paper, or intermediate transfer member or by erosion or scratching from toner components. The combination of hard and soft segments allows for a tough, wear resistant material with the added flexibility to prevent erosion from toner particles that are swept along the surface of the drum by the cleaner blade. A benzophenone ultraviolet absorber chemically linked to the silsesquioxane appears to inhibit room light fatigue and improve the electrostatic cycling of the PC drum. The overcoat also inhibits crazing.
    Type: Grant
    Filed: June 3, 2005
    Date of Patent: April 15, 2008
    Assignee: Lexmark International, Inc.
    Inventors: Scott Daniel Reeves, Edward Wayne Weidert
  • Patent number: 7344810
    Abstract: The invention relates to an electrophotographic photosensitive member, and more specifically, to a photosensitive member having a photosensitive layer superimposed over a substrate. In one aspect of the invention, sequential laminations of a dispersion layer of conductive tantalum-doped tin oxide powder dispersed in a binder resin solution, are provided between the substrate layer and the photosensitive layer. Another aspect of the invention relates to a protective layer provided for the photosensitive layer. The protective layer of the most exterior surface of the photosensitive member may be a dispersion layer formed by dispersing tantalum-doped tin oxide powder in a resin solution.
    Type: Grant
    Filed: September 19, 2001
    Date of Patent: March 18, 2008
    Assignee: Minolta Co., Ltd.
    Inventors: Kimiyiki Ito, Keiichi Inagaki, Takeshi Ishida
  • Patent number: 7229731
    Abstract: To provide a high-image-quality electrophotographic photosensitive member having a high sensitivity for a wavelength close to 380 to 500 nm, remarkable image resolution property in which absorption of the wavelength is hardly recognized, working-environment characteristic and high safety and superior in abrasion resistance and fabrication easiness and reducing optical memories and an electrophotographic apparatus using the high-image-quality electrophotographic photosensitive member. In the case of an electrophotographic photosensitive member having a substrate, photoconductive layer formed on the substrate and surface layer formed on the photoconductive layer and using silicon and nitrogen atoms as base material and containing an amorphous material containing at least oxygen atoms, the surface layer contains nitrogen atoms as an average concentration shown by the following expression (1) and contains oxygen atoms by the maximum value Omax of the number of oxygen atoms in the thickness direction: 0.
    Type: Grant
    Filed: April 19, 2006
    Date of Patent: June 12, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventors: Makoto Aoki, Satoshi Kojima, Hironori Owaki, Kazuto Hosoi, Jun Ohira
  • Patent number: 7229730
    Abstract: The invention provides a process for producing a negative-charging electrophotographic photosensitive member which can improve the adherence between a first layer and a second layer without lowering the effect of lessening image defects and realize a reduction in overall costs, a negative-charging electrophotographic photosensitive member produced by the process, and an electrophotographic apparatus. In the process for producing a negative-charging electrophotographic photosensitive member, a first layer is deposited on a substarte, at least the vertexes of protuberances are removed, the substrate with the first layer deposited theron is placed in a film forming furnace, the first layer surface is plasma-treated with a gas containing at least a Group 13 element in the periodic table and a dilution gas composed of at least one selected from hydrogen, argon and helium, and a layer formed of a non-single-crystal material is deposited as the second layer on the first layer.
    Type: Grant
    Filed: January 27, 2006
    Date of Patent: June 12, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jun Ohira, Satoshi Kojima, Makoto Aoki, Kazuto Hosoi
  • Patent number: 7205081
    Abstract: An imaging method utilizing an imaging member containing a supporting substrate, a layer of a charge carrier injecting surface, a hole blocking layer, an optional adhesive layer, a layer of a charge carrier transport material, a layer of an charge carrier generating material, an optional charge trapping layer, a crossed linked silicone rubber, and an electrically insulating overcoating layer. The member is first charged with electrostatic charges of a first polarity, charged a second time with electrostatic charges of a polarity opposite to said first polarity in order to substantially neutralize the charges residing on the electrically insulating surface of the member and exposed to an imagewise pattern of activating electromagnetic radiation whereby an electrostatic latent image is formed. The electrostatic latent image may be developed to form a visible image which may be transferred to a receiver member. The imaging member may be reused after erasure and cleaning.
    Type: Grant
    Filed: December 14, 2001
    Date of Patent: April 17, 2007
    Assignee: Xerox Corporation
    Inventors: Merlin E. Scharfe, Richard L. Schank, William W. Limburg, Damodar M. Pai, Dale S. Renfer, John F. Yanus, Paul J. DeFeo
  • Patent number: 7157197
    Abstract: An electrophotographic photosensitive member is provided which can keep at a minimum the absorption of image exposure light of 380 to 500 nm in wavelength in its surface layer and concurrently can satisfactorily keep electrophotographic properties including resolving power. The electrophotographic photosensitive member has a substrate, and a photoconductive layer and a surface layer in this order provided on the substrate. The surface layer includes an amorphous material composed chiefly of silicon atoms and nitrogen atoms and containing at least oxygen atoms and carbon atoms, and the ratios of the numbers of the respective oxygen atoms, carbon atoms and nitrogen atoms to the total number of oxygen atoms, carbon atoms and nitrogen atoms contained in the amorphous material are each within a specific range.
    Type: Grant
    Filed: March 17, 2006
    Date of Patent: January 2, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventors: Makoto Aoki, Satoshi Kojima, Motoya Yamada, Kazuto Hosoi, Jun Ohira, Hironori Owaki
  • Patent number: 7153621
    Abstract: An electrophotographic photoreceptor including a photosensitive layer on an electroconductive substrate, wherein nitrate ion is present on the surface of the photosensitive layer in an amount of from 50 to 300 ?g per 1 m2 of the surface of the photosensitive layer when the nitrate ion is determined by an ion chromatographic method. Preferably a material having a fluorine atom and a carbon atom or a fatty acid metal salt such as zinc stearate is further present on the surface of the photosensitive layer such that the F/C ratio is from 0.05 to 0.5 or the Zn/C ratio is from 0.001 to 0.1. An image forming apparatus using the photoreceptor is also provided.
    Type: Grant
    Filed: June 24, 2005
    Date of Patent: December 26, 2006
    Assignee: Ricoh Company Limited
    Inventors: Narihito Kojima, Ryuta Takeichi, Akiyo Namiki, Hiroshi Nagame, Yohta Sakon
  • Patent number: 7150950
    Abstract: An electrostatographic imaging member having a flexible supporting substrate, an imaging layer capable of retaining an electrostatic latent image, and an electrically conductive ground strip layer comprising a film forming binder and a lignin sulfonic acid doped polyaniline dispersion, and an image forming apparatus with the above imaging member to receive an electrostatic latent image on a charge-retentive surface of the imaging member; a development component to apply toner to the charge-retentive surface to develop the electrostatic latent image to form a developed toner image on the charge-retentive surface; a transfer component to transfer the developed toner image from the charge-retentive surface to a receiving copy substrate; and a fixing component to fuse the developed image to the receiving copy substrate.
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: December 19, 2006
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Satchidanand Mishra, Anthony M. Horgan, Richard L. Post, Edward F. Grabowski, Kathleen M. Carmichael, Satish Parikh, Bing R. Hsieh, Donald C. VonHoene
  • Patent number: 7147978
    Abstract: This invention relates to a photoreceptor that includes: (a) an overcoat layer comprising at least a rheology modifier and a polymeric resin selected from the group consisting of urethane resins, urethane-epoxy resins, acrylated-urethane resins, urethane-acrylic resins, and a combination thereof. (b) at least a charge transport compound; (c) at least a charge generating compound; and (d) an electrically conductive substrate.
    Type: Grant
    Filed: October 22, 2002
    Date of Patent: December 12, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jiayi Zhu, Kristine A. Fordahl
  • Patent number: 7132208
    Abstract: A composition forms an overcoat layer for an organic photoreceptor by combining an organic silane compound, an acrylic polymer, polyvinyl butyral and a solvent. The organic photoreceptor has increased electrical and mechanical properties, leading to improved life characteristics. Also, unlike when a single material of either acrylic polymer or silsesquioxane is used in forming an overcoat layer, when the composition of the present invention is used, it is not necessary to coat a primer or an adhesive layer, thereby simplifying a coating process and reducing the cost required in forming additive layers.
    Type: Grant
    Filed: April 15, 2003
    Date of Patent: November 7, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Nam-jeong Lee, Kyung-yol Yon
  • Patent number: 7122284
    Abstract: An electrophotographic photoconductor has an electroconductive support and a photoconductive layer which is formed thereon and contains at least one resin of a polyurethane resin, a polyester resin, or a polycarbonate resin, each resin having at least a structural unit of formula (1): wherein R1, R2, R3, a, b, and n are the same as those specified in the specification. An electrophotographic image forming apparatus and method, and a process cartridge employ the above photoconductor.
    Type: Grant
    Filed: October 6, 2005
    Date of Patent: October 17, 2006
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinichi Kawamura, Kazukiyo Nagai, Tomoyuki Shimada, Chiaki Tanaka, Michihiko Namba
  • Patent number: 7122283
    Abstract: A photoconductive member containing, for example, a substrate, a photogenerating layer, a charge transport layer and an overcoat layer wherein the overcoat layer is comprised of a crosslinked siloxane composite containing a caprolactone-siloxane.
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: October 17, 2006
    Assignee: Xerox Corporation
    Inventors: Yu Qi, Nan-Xing Hu, H. Bruce Goodbrand, Ah-Mee Hor, Cheng-Kuo Hsiao, Cuong Vong, Gregory McGuire
  • Patent number: 7108947
    Abstract: A photoconductive imaging member includes a hole blocking layer, a photogenerating layer, a charge transport layer, and an optional overcoating layer, wherein at least one of the charge transport layer and the optional overcoating layer is formed in a sol-gel process.
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: September 19, 2006
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Liang-Bih Lin, Anna M. Main, Linda L. Ferrarese
  • Patent number: 7078140
    Abstract: According to the present invention, there is provided: an electrophotographic photosensitive member having a photosensitive layer on a support in which a surface layer of the electrophotographic photosensitive member comprises an acrylic polymer having a polyfluoroolefin unit and an alkylene oxide unit, and having a number-average molecular weight in a range of 2,000 to 20,000; a process cartridge and an electrophotographic apparatus both comprising the electrophotographic photosensitive member.
    Type: Grant
    Filed: July 15, 2003
    Date of Patent: July 18, 2006
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kimihiro Yoshimura, Yosuke Morikawa, Tatsuya Ikezue, Kouichi Nakata, Shuji Ishii, Daisuke Tanaka
  • Patent number: 7043175
    Abstract: In an image forming system, an image-bearing member having a photoconductor layer comprising an Si-based non-single crystal material is charged at a relatively low potential of 250 to 600 volts by a contact charging member in the presence of electroconductive fine powder. An electrostatic latent image formed on the image-bearing member is developed with a magnetic toner which includes magnetic toner particles comprising at least a binder resin and a magnetic iron oxide, and inorganic fine powder and electroconductive fine powder present at the surface of the magnetic toner particles. The magnetic toner has a weight-average particle size of 3-10 ?m and an average circularity of 0.950 to 0.995, and contains 0.05 to 3.00% of isolated iron-containing particles.
    Type: Grant
    Filed: November 15, 2001
    Date of Patent: May 9, 2006
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keiji Komoto, Tsuyoshi Takiguchi, Tatsuhiko Chiba, Michihisa Magome, Akira Hashimoto, Takeshi Kaburagi