Inorganic Containing Patents (Class 430/63)
  • Patent number: 10303085
    Abstract: Provided is an electrophotographic photosensitive member capable of achieving both high leak resistance and reduction in variations in dark part potential and bright part potential due to repeated use even when CB is used for an electrically conductive layer. An electrophotographic photosensitive member including: a support, an electrically conductive layer, and a photosensitive layer, sequentially, wherein the electrically conductive layer contains a binder resin and carbon black, a number average primary particle diameter of the carbon black is 200 nm or more and 500 nm or less, an average inter-particle distance of the carbon black is 200 nm or more and 600 nm or less, a coefficient of variation of an inter-particle distance is 1.2 or less, and SF-1 of the carbon black is 150 or less.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: May 28, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Taichi Sato, Jumpei Kuno, Kenichi Kaku, Takashi Anezaki, Atsushi Fujii
  • Patent number: 10073362
    Abstract: An electrophotographic photosensitive member that can not easily cause charging lines even where it is an electrophotographic photosensitive member employing as a conductive layer a layer containing metal oxide particles is disclosed. Also disclosed are a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member. The electrophotographic photosensitive member has a conductive layer which contains titanium oxide particles coated with tin oxide doped with phosphorus or tungsten.
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: September 11, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Atsushi Fujii, Haruyuki Tsuji, Hideaki Matsuoka, Kazuhisa Shida, Nobuhiro Nakamura
  • Patent number: 10000694
    Abstract: The invention relates to compounds which can be used in electronic devices, and to electronic devices, in particular organic electroluminescent devices, containing said compounds.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: June 19, 2018
    Assignee: Merck Patent GmbH
    Inventors: Amir Hossain Parham, Thomas Eberle, Anja Jatsch, Christof Pflumm, Jonas V. Kroeber
  • Patent number: 9470989
    Abstract: A conductive layer of an electrophotographic photosensitive member contains a first metal oxide particle, a second metal oxide particle, and a binder material. The first metal oxide particle is a zinc oxide particle or tin oxide particle coated with tin oxide doped with phosphorus, tungsten, fluorine, niobium, or tantalum, and the second metal oxide particle is a tin oxide particle doped with an element selected from the group consisting of phosphorus, tungsten, fluorine, niobium, and tantalum, the element being the same as the element with which the tin oxide of the first metal oxide particle is doped. The conductive layer satisfies formulae (1) and (2) 2?{(V2/VT)/(V1/VT)}×100?25??formulae (1): 15?{(V1/VT)+(V2/VT)}×100?45??formulae (2).
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: October 18, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroyuki Tomono, Haruyuki Tsuji, Atsushi Fujii, Kazuhisa Shida, Nobuhiro Nakamura, Hideaki Matsuoka, Takashi Anezaki
  • Patent number: 9423706
    Abstract: An electrophotographic photosensitive member includes a support and a photosensitive layer formed on the support. A surface layer of the electrophotographic photosensitive member contains a polymerized product of a composition that contains a charge transporting compound having a particular group (polymerizable functional group).
    Type: Grant
    Filed: November 18, 2013
    Date of Patent: August 23, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaki Nonaka, Hideaki Nagasaka, Masato Tanaka
  • Patent number: 9360779
    Abstract: An electrophotographic photoconductor has a support medium, an undercoat layer formed immediately on the support medium, and a photosensitive layer formed immediately on the undercoat layer, in which the undercoat layer contains a binding resin and composite particles each containing a core material particle covered with tin oxide doped with a predetermined amount of aluminum.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: June 7, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenichi Ikari, Wataru Kitamura, Mai Murakami, Daisuke Tanaka, Kazumichi Sugiyama, Takeshi Murakami, Daisuke Kawaguchi
  • Patent number: 9291924
    Abstract: A photoconductor is provided. The photoconductor includes an electroconductive substrate; an intermediate layer located overlying the electroconductive substrate; and a photosensitive layer located overlying the intermediate layer. The intermediate layer includes at least a resin, and a particulate zinc oxide that includes sodium, sulfur and calcium in amounts of from 10 ppm to 200 ppm, from 50 ppm to 500 ppm, and from 10 ppm to 200 ppm, respectively.
    Type: Grant
    Filed: December 2, 2014
    Date of Patent: March 22, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Eiji Kurimoto, Tetsuro Suzuki, Tomoharu Asano, Daisuke Nii, Toshihiro Ishida
  • Patent number: 9093196
    Abstract: Conductive particles each includes a polymer base particle and a conductive layer coating the polymer base particle. Let the compressive elastic deformation characteristic KX of one conductive particle when the displacement of particle diameter of the conductive particles is X % be defined by the following formula: KX=(3/?2)·(SX?3/2)·(R?1/2)·FX. FX is the load (N) necessary for X % displacement of the conductive particles. SX is the compressive deformation amount (mm) upon X % displacement of the conductive particles. R is the particle radius (mm) of the conductive particles. The compressive elastic deformation characteristic K50 when the displacement of particle diameter of the conductive particles is 50% is 100 to 50000 N/mm2 at 20° C., and the recovery factor of particle diameter of the conductive particles when the displacement of particle diameter of the conductive particles is 50% is not less than 30% at 20° C.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: July 28, 2015
    Assignee: NISSHINBO HOLDINGS, INC.
    Inventors: Toshifumi Hashiba, Kazutoshi Hayakawa, Satomi Kudo, Kohei Moriyama, Tsuyoshi Fujii
  • Patent number: 8980510
    Abstract: An electrophotographic photosensitive member in which a leakage hardly occurs, a process cartridge and electrophotographic apparatus having the electrophotographic photosensitive member, and a method for producing the electrophotographic photosensitive member are provided. The conductive layer in the electrophotographic photosensitive member contains metal oxide particle coated with tin oxide doped with niobium or tantalum. The relations: Ia?6,000 and 10?Ib are satisfied. The conductive layer before the test is performed has a volume resistivity of not less than 1.0×108 ?·cm and not more than 5.0×1012 ?·cm.
    Type: Grant
    Filed: August 21, 2013
    Date of Patent: March 17, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsushi Fujii, Hiroyuki Tomono, Haruyuki Tsuji
  • Patent number: 8956794
    Abstract: A negative-charge type electrophotographic photoreceptor includes a conductive substrate; an undercoat layer which includes a binder resin and metal oxide particles and in which the work function is from 4.0 eV to 4.7 eV; a charge generation layer in which a difference between the work functions of the charge generation layer and the undercoat layer is from ?4 eV to 0 eV; and a charge transport layer which is provided on the charge generation layer.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: February 17, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Shinya Yamamoto
  • Patent number: 8932787
    Abstract: An electrophotographic photoconductor including: an electroconductive substrate; an intermediate layer; and a photoconductive layer, the intermediate layer and the photoconductive layer being on the electroconductive substrate, wherein the intermediate layer includes an inorganic pigment and a binder resin, wherein a volume ratio of the inorganic pigment in the intermediate layer is 30% by volume to 50% by volume, wherein the inorganic pigment comprises titanium oxide and a content of the titanium oxide in the inorganic pigment is 70% by mass to 90% by mass, wherein the inorganic pigment has a specific surface area of 70 m2/g to 140 m2/g, and wherein the intermediate layer has a volume resistivity at an electrical field intensity of 2.5×105 V/cm of 5×1011 ?·cm to 1×1013 ?·cm.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: January 13, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Eiji Kurimoto, Tadayoshi Uchida, Hideki Nakamura
  • Patent number: 8808953
    Abstract: An electrophotographic photoreceptor includes a conductive support, and an undercoat layer, a charge generation layer, and a charge transport layer that are provided in this order on the conductive support, wherein the undercoat layer includes at least metallic oxide particles, a reactive acceptor substance including an anthraquinone structure expressed by the following Formula 1, and a binder resin, the charge generation layer includes hydroxygallium phthalocyanine as a charge generation material, and a reflectance of incident light having a wavelength of 780 nm on a surface of the charge generation layer when the charge transport layer is removed is 17% or greater: wherein the anthraquinone structure expressed by Formula 1 is bonded to another structure at a position of *, and thus forms the reactive acceptor substance, and in Formula 1, n1 represents an integer of 1 to 7.
    Type: Grant
    Filed: July 30, 2012
    Date of Patent: August 19, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Satoya Sugiura, Shigeto Hashiba, Kazuhiro Koseki, Hirofumi Nakamura, Kenta Ide, Akihiro Nonaka, Kosuke Narita, Akihiro Kawasaki
  • Patent number: 8802337
    Abstract: An electrophotographic photoreceptor includes a support; an undercoat layer which is provided on the support and contains at least a binder resin, metal oxide particles, and an electron-accepting compound having an anthraquinone structure, in which a content of the electron-accepting compound is from 0.5% by weight to 1.5% by weight with respect to the metal oxide particles and a contact angle of the metal oxide particles with respect to water is from 7° to 12°; and a photosensitive layer which is provided on the undercoat layer.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: August 12, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Akihiro Kawasaki, Shigeto Hashiba, Hirofumi Nakamura, Hidemi Nukada, Satoya Sugiura
  • Patent number: 8778580
    Abstract: An electrophotographic photosensitive member having a specific conductive layer and promising less variation in light-area potential and residual potential in reproducing images repeatedly, and a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member are provided. Where a test in which a voltage of ?1.0 kV having only a DC voltage component is continuously applied to the conductive layer for 1 hour is conducted, the conductive layer has volume resistivity satisfying the following mathematical expressions (1) and (2), as values before and after the test: ?2.00?(log|?2|?log|?1|)?2.00??(1), and 1.0×108??1?2.0×1013??(2), where, in the expressions (1) and (2), ?1 is volume resistivity (?·cm) of the conductive layer as measured before the test and ?2 is volume resistivity (?·cm) of the conductive layer as measured after the test.
    Type: Grant
    Filed: September 3, 2010
    Date of Patent: July 15, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Haruyuki Tsuji, Atsushi Fujii, Hideaki Matsuoka
  • Patent number: 8735031
    Abstract: An electrophotographic photoreceptor includes an electroconductive substrate; an undercoat layer provided on the electroconductive substrate and composed of: metal oxide fine particles including particles of at least one metal oxide and at least one organic compound provided on the particles of the at least one metal oxide as a surface treatment; and a copolymer resin synthesized by copolymerization of essential constituent monomers composed of a dicarboxylic acid, a diol, a triol and a diamine; and a photosensitive layer laminated on the undercoat layer. The undercoat layer permits (a) attaining stable electric potential characteristics in all environments ranging from low temperature and low humidity environments to high temperature and high humidity environments, (b) suppressing the occurrence of printing defects and density differences, and (c) simultaneously attaining transfer restorability and restorability from intense light-induced fatigue even in a wide variety of usages and operation environments.
    Type: Grant
    Filed: November 27, 2009
    Date of Patent: May 27, 2014
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Kazuki Nebashi, Yoichi Nakamura, Ikuo Takaki, Seizo Kitagawa, Shinjiro Suzuki
  • Publication number: 20140093277
    Abstract: An electrophotographic photosensitive member that can not easily cause charging lines even where it is an electrophotographic photosensitive member employing as a conductive layer a layer containing metal oxide particles is disclosed. Also disclosed are a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member. The electrophotographic photosensitive member has a conductive layer which contains titanium oxide particles coated with tin oxide doped with phosphorus or tungsten.
    Type: Application
    Filed: December 3, 2013
    Publication date: April 3, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Atsushi Fujii, Haruyuki Tsuji, Hideaki Matsuoka, Kazuhisa Shida, Nobuhiro Nakamura
  • Publication number: 20140065529
    Abstract: An electrophotographic photosensitive member in which a leakage hardly occurs, a process cartridge and electrophotographic apparatus having the electrophotographic photosensitive member, and a method for producing the electrophotographic photosensitive member are provided. The conductive layer in the electrophotographic photosensitive member contains metal oxide particle coated with tin oxide doped with niobium or tantalum. The relations: Ia?6,000 and 10?Ib are satisfied. The conductive layer before the test is performed has a volume resistivity of not less than 1.0×108 ?·cm and not more than 5.0×1012 ?·cm.
    Type: Application
    Filed: August 21, 2013
    Publication date: March 6, 2014
    Applicant: Canon Kabushiki Kaisha
    Inventors: Atsushi Fujii, Hiroyuki Tomono, Haruyuki Tsuji
  • Patent number: 8654502
    Abstract: An apparatus, a method, a planar insulating substrate and a chipset have been presented, comprising at least one module configured to establish a predefined pattern on a planar insulating substrate so that conductive particles can gather according to the predefined pattern. At least one another module is configured to transfer the conductive particles to the planar insulating substrate, wherein the conductive particles are arranged to gather according to the predefined pattern. A sintering module is configured to fuse the conductive particles on the planar insulating substrate, wherein the conductive particles are arranged to fuse according to the predefined pattern to establish a conductive plane on the planar insulating substrate. Embodiment of the invention relate to printable or printing electronics on a fibrous web.
    Type: Grant
    Filed: May 9, 2008
    Date of Patent: February 18, 2014
    Assignee: Stora Enso Oyj
    Inventors: Juha Maijala, Petri Sirviö
  • Publication number: 20140045110
    Abstract: An electrophotographic photoreceptor includes a cylindrical conductive substrate that is formed of a metal or an alloy and has an average area of crystal grains of 100 ?m2 or greater; and a photosensitive layer that is provided on the conductive substrate.
    Type: Application
    Filed: February 26, 2013
    Publication date: February 13, 2014
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Keiko MATSUKI, Takayuki YAMASHITA, Yoshifumi SHOJI, Mitsuhide NAKAMURA, Yuko YAMANO, Shinya YAMAMOTO
  • Publication number: 20130316275
    Abstract: An electrophotographic photoreceptor includes a support; an undercoat layer which is provided on the support and contains at least a binder resin, metal oxide particles, and an electron-accepting compound having an anthraquinone structure, in which a content of the electron-accepting compound is from 0.5% by weight to 1.5% by weight with respect to the metal oxide particles and a contact angle of the metal oxide particles with respect to water is from 7° to 12°; and a photosensitive layer which is provided on the undercoat layer.
    Type: Application
    Filed: November 8, 2012
    Publication date: November 28, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Akihiro KAWASAKI, Shigeto HASHIBA, Hirofumi NAKAMURA, Hidemi NUKADA, Satoya SUGIURA
  • Patent number: 8546050
    Abstract: The present invention is an electrophotographic photosensitive member including a conductive support, an intermediate layer which is placed on the conductive support, and a photosensitive layer which is placed on the intermediate layer, wherein the intermediate layer comprises a metal-oxide particle and a compound having a structure represented by the following formula (1):
    Type: Grant
    Filed: July 13, 2011
    Date of Patent: October 1, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihiro Maruyama, Kunihiko Sekido, Michiyo Sekiya, Hideaki Nagasaka, Shinji Takagi
  • Patent number: 8524430
    Abstract: The present invention relates to an electrophotographic photosensitive member obtained by providing, on a conductive support, a conductive layer containing conductive particles having a volume-average particle diameter of 0.1 ?m or more, an intermediate layer, and a photosensitive layer in the stated order in which the conductive layer contains a polyolefin resin containing a specific repeating structural unit at a specific ratio, and a process cartridge and an electrophotographic apparatus each having the electrophotographic photosensitive member.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: September 3, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinji Takagi, Hideaki Nagasaka, Kunihiko Sekido, Michiyo Sekiya
  • Patent number: 8512922
    Abstract: Aspects of the present invention provide an electrophotographic photosensitive member in which an intermediate layer contains metal oxide particles, an organic resin, and a specific compound (fluorenone derivative), and a process cartridge and an electrophotographic apparatus including the electrophotographic photosensitive member.
    Type: Grant
    Filed: October 12, 2010
    Date of Patent: August 20, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuka Ishiduka, Wataru Kitamura, Kenichi Kaku, Mai Murakami
  • Patent number: 8420283
    Abstract: 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 D50 of 0.1 ?m or less and a volume particle size distribution width index SD satisfying the following Expression (1) which are measured by a dynamic light-scattering method in the coating liquid for forming an undercoat layer, 0.010?SD?0.040??(1) where SD=(D84?D16)/2, where D84 represents the particle diameter (?m) at a point of 84% in the cumulative volume particle size distribution curve, and D16 represents the particle diameter (?m) at a point of 16% in the cumulative volume particle size distribution curve.
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: April 16, 2013
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Hiroe Fuchigami, Kozo Ishio
  • Patent number: 8415079
    Abstract: 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 ?m 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%.
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: April 9, 2013
    Assignee: Mitsubishi Chemical Corporation
    Inventor: Hiroe Fuchigami
  • Patent number: 8404411
    Abstract: 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 ?m or less and a 90% cumulative particle diameter of 0.3 ?m 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.
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: March 26, 2013
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Teruyuki Mitsumori, Kozo Ishio, Hiroe Fuchigami, Hiroaki Takamura, Yasunori Kawai
  • Patent number: 8399164
    Abstract: A photoconductor that includes, for example, a supporting substrate, an undercoat layer thereover wherein the undercoat layer contains a metal oxide a phenolic resin and a dendritic polyester polyol; a photogenerating layer; and at least one charge transport layer.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: March 19, 2013
    Assignee: Xerox Corporation
    Inventor: Jin Wu
  • Publication number: 20130040233
    Abstract: An electrophotographic photoreceptor includes a substrate; an undercoat layer provided on the substrate and containing a tin-zinc complex oxide powder having a volume resistivity of about 2×109 ?·cm or less; and a photosensitive layer provided on the undercoat layer.
    Type: Application
    Filed: February 29, 2012
    Publication date: February 14, 2013
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Kazunori ANAZAWA, Tomoko MIYAHARA, Kaoru TORIKOSHI
  • Patent number: 8361686
    Abstract: An electrophotographic photoreceptor comprising at least a photosensitive layer on an electroconductive substrate, a surface layer of the electrophotographic photoreceptor including a fluorinated alkyl group-containing copolymer having repeating units represented by the following formulae A and B, and fluorine-based resin particles: wherein in Formulae A and B, l, m and n each independently represent a integer number of 1 or more; p, q, r and s each independently represent 0 or an integer of 1 or more; t represents an integer of from 1 to 7; R1, R2, R3, and R4 each independently represent a hydrogen atom or an alkyl group; X represents an alkylene chain, a halogen-substituted alkylene chain, —S—, —O—, —NH— or a single bond; Y represents an alkylene chain, a halogen-substituted alkylene chain, —(CzH2z-1(OH))— or a single bond; and z represents an integer of 1 or more.
    Type: Grant
    Filed: October 7, 2008
    Date of Patent: January 29, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Hidemi Nukada, Shinya Yamamoto, Masaru Miura, Hitoshi Takimoto, Takahiro Suzuki, Tetsunao Koujiri
  • Patent number: 8298733
    Abstract: In an electrophotographic apparatus (e.g., a photocopier or laser printer), an electrophotographic photosensitive member (image-forming part) has a metal substrate roughened on its surface, a metal oxide-containing undercoat layer on the substrate, and an organic photosensitive layer over the undercoat. A coherent light source (e.g., laser) can cause interference fringes that degrade the printed image. Interference fringes are judged (or predicted) as follows: The surface reflectance is measured at intervals over the spectral width of the light source. The measured surface reflectance is corrected, using a mirror-surface conductive substrate as a reference, to obtain a reflectance of the photosensitive member. The reflectance is subjected to a discrete Fourier transformation, which generates a power spectrum, over the spectral width of the light source, from the reflectance as a function of the wavelength.
    Type: Grant
    Filed: November 10, 2004
    Date of Patent: October 30, 2012
    Assignee: Fuji Electric Co., Ltd.
    Inventor: Motohiro Takeshima
  • Patent number: 8178264
    Abstract: 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. A coating fluid for forming un undercoat layer of an electrophotographic photoreceptor containing titanium oxide particles and a binder resin, characterized in that titanium oxide agglomerated secondary particles in the coating fluid have a volume average particle size of at most 0.1 ?m and a cumulative 90% particle size of at most 0.3 ?m.
    Type: Grant
    Filed: October 3, 2005
    Date of Patent: May 15, 2012
    Assignee: Mitsubishi Chemical Corporation
    Inventor: Hiroe Fuchigami
  • Patent number: 8129081
    Abstract: Exemplary embodiments provide charge generating layers and electrographic imaging members containing the charge generating layers. In various embodiments, an imaging member can be a multilayered photoconductive imaging member with a charge generating layer including, for example, a photogenerating pigment, such as a metal phthalocyanine; a dopant material, such as a multiple halide compound dopant and/or an ether dopant; and a binder or polymer. The imaging members can exhibit high photosensitivity, low residual potential (Verase), and excellent cyclic/environmental stability and can be used as photoreceptors, photosensitive members, and the like, in a machine of copy, printer, fax, scan, multifunction machines, and the like.
    Type: Grant
    Filed: September 17, 2008
    Date of Patent: March 6, 2012
    Assignee: Xerox Corporation
    Inventors: Brian Gilmartin, Liang-Bih Lin
  • Patent number: 8080182
    Abstract: The oxide sintered body mainly consists of gallium, indium, and oxygen, and a content of the gallium is more than 65 at. % and less than 100 at. % with respect to all metallic elements, and the density of the sintered body is 5.0 g/cm3 or more. The oxide film is obtained using the oxide sintered body as a sputtering target, and the shortest wavelength of the light where the light transmittance of the film itself except the substrate becomes 50% is 320 nm or less. The transparent base material is obtained by forming the oxide film on one surface or both surfaces of a glass plate, a quartz plate, a resin plate or resin film where one surface or both surfaces are covered by a gas barrier film, or on one surface or both surfaces of a transparent plate selected from a resin plate or a resin film where the gas barrier film is inserted in the inside.
    Type: Grant
    Filed: September 16, 2009
    Date of Patent: December 20, 2011
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Tokuyuki Nakayama, Yoshiyuki Abe
  • Patent number: 8012656
    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 the backing layer is comprised of an acrylic resin and a crosslinkable fluoro additive.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: September 6, 2011
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Lanhui Zhang, Lin Ma
  • Patent number: 7794906
    Abstract: A photoconductor that includes, for example, a substrate; an undercoat layer thereover wherein the undercoat layer contains a metal oxide and a carbazole containing compound; a photogenerating layer; and at least one charge transport layer.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: September 14, 2010
    Assignee: Xerox Corporation
    Inventor: Jin Wu
  • Patent number: 7732113
    Abstract: In an electrophotographic photosensitive member having a support, a conductive layer formed on the support, an intermediate layer formed on the conductive layer, and a photosensitive layer formed on the intermediate layer, the conductive layer has been formed by using a conductive layer coating fluid which contains TiO2 particles coated with oxygen deficient SnO2 having an average particle diameter of from 0.20 ?m or more to 0.60 ?m or less, and has a volume resistivity of from more than 8.0×108 ?cm to 1.0×1011 ?cm or less. The electrophotographic photosensitive member can keep charging lines from occurring.
    Type: Grant
    Filed: March 24, 2006
    Date of Patent: June 8, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazushige Nakamura, Hidetoshi Hirano, Hirotoshi Uesugi, Hirofumi Kumoi, Shinji Takagi, Yukihiro Abe, Junpei Kuno, Daisuke Miura
  • Patent number: 7727691
    Abstract: An electrophotographic photosensitive member includes a conductive layer, an intermediate layer and a photosensitive layer in this order on a substrate, in which the conductive layer contains a binder resin and conductive particles. The conductive particles are TiO2 particles coated with oxygen-deficient SnO2, the conductive particles have an average particle size of 0.2 to 0.6 ?m and the conductive layer has a volume resistivity of 5×105 to 8×108 ?·cm. Also this invention provides a process cartridge and an electrophotographic apparatus equipped with such electrophotographic photosensitive member.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: June 1, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventors: Nobumichi Miki, Hideaki Nagasaka, Michiyo Sekiya, Kunihiko Sekido, Yosuke Morikawa
  • Patent number: 7655371
    Abstract: A photoconductive imaging member including at least a substrate, an optional thick undercoat layer, a charge generating layer comprising a high sensitivity pigment and a low sensitivity pigment, and a charge transport layer.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: February 2, 2010
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Liang-bih Lin, Geoffrey M. T. Foley
  • Patent number: 7645555
    Abstract: An electrophotographic photoreceptor and method for forming a photoreceptor is disclosed which is provided with an anticorrosion layer on the interface between the supporting substrate surface and the undercoat layer. The photoreceptor has a high mechanical strength and minimizes defects in print for longer periods of time.
    Type: Grant
    Filed: April 8, 2009
    Date of Patent: January 12, 2010
    Assignee: Xerox Corporation
    Inventors: Liang-Bih Lin, Philip G. Perry, Andronique Ioannidis, William G. Herbert, David M. Skinner, Jin Wu, Kendra Michele Giza, Nancy Belknap, Yonn Rasmussen, Geoffrey M. T. Foley, John F. Yanus, Jennifer Y. Hwang, Robert P. Altavela
  • Patent number: 7563549
    Abstract: Provided is an imaging member comprising a substrate, an undercoat layer (UCL), a charge generation layer, a charge transport layer, and an optional overcoat layer. The undercoat layer is formed from a single-phase UCL coating formulation comprising an organic titanate, a polymer containing active hydrogen, and an aminosilane. The UCL formulation has improved properties such as stability, processing convenience, and longer pot life etc. The UCL formulation can be used to manufacture an imaging member such as photoreceptor with improved properties such as stable, thick UCL coating, resistance to electrical failure, and PIDC independency on UCL thickness etc.
    Type: Grant
    Filed: May 20, 2005
    Date of Patent: July 21, 2009
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Yuhua Tong, Jennifer Y. Hwang, Liang-bih Lin, Andronique Ioannidis, Nancy L. Belknap, Timothy J. O'Brien, Anthony Uttaro, Jr.
  • Patent number: 7534536
    Abstract: A photoconductor containing a substrate, an undercoat layer thereover comprising a polyol resin, an aminoplast resin, a polyarylate, a siloxane modified polyarylate, an epoxy modified polyarylate, or a urethane modified polyarylate, or an amine modified polyarylate, and a metal oxide; a photogenerating layer, and at least one charge transport layer.
    Type: Grant
    Filed: August 1, 2006
    Date of Patent: May 19, 2009
    Assignee: Xerox Corporation
    Inventors: Liang-Bih Lin, Daniel V. Levy, Jin Wu, Francisco J. Lopez
  • Patent number: 7534535
    Abstract: An electrophotographic photoreceptor is disclosed which is provided with an anti-corrosion layer on the interface between the substrate surface and hole blocking layer. The photoreceptor has high mechanical strength and minimizes defects in print for longer periods of time.
    Type: Grant
    Filed: November 23, 2004
    Date of Patent: May 19, 2009
    Assignee: Xerox Corporation
    Inventors: Liang-Bih Lin, Philip G. Perry, Andronique Ioannidis, William G. Herbert, David M. Skinner, Jin Wu, Kendra Michele Giza, Nancy Belknap, Yonn Rasmussen, Geoffrey M. T. Foley, John F. Yanus, Jennifer Y. Hwang, Robert P. Altavela
  • Patent number: 7534537
    Abstract: An electrophotographic photosensitive member includes a conductive layer, an intermediate layer and a photosensitive layer in this order on a substrate, in which the conductive layer contains a binder resin and conductive particles. The conductive particles are TiO2 particles coated with oxygen-deficient SnO2, the conductive particles have an average particle size of 0.2 to 0.6 ?m and the conductive layer has a volume resistivity of 5×105 to 8×108 ?cm. Also this invention provides a process cartridge and an electrophotographic apparatus equipped with such electrophotographic photosensitive member.
    Type: Grant
    Filed: April 12, 2005
    Date of Patent: May 19, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventors: Nobumichi Miki, Hideaki Nagasaka, Michiyo Sekiya, Kunihiko Sekido, Yosuke Morikawa
  • Publication number: 20090011348
    Abstract: Disclosed is an electrophotographic photoreceptor comprising on or over an electrically conductive support a photosensitive layer containing a pyranthrone compound represented by the following formula and the pyranthrone compound has a crystal structure exhibiting a CuK? X-ray diffraction spectrum having peaks at angles (2?±0.2°) of 12.3°, 20.5°, 25.3° and 28.3°.
    Type: Application
    Filed: June 16, 2008
    Publication date: January 8, 2009
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Tomoko SAKIMURA, Toyoko SHIBATA, Shinichi HAMAGUCHI
  • Publication number: 20080220346
    Abstract: A photoreceptor includes a conductive support body, an intermediate layer, and a photosensitive layer. The intermediate layer is made of gallium nitride (GaN) crystals having electron affinity greater than that of the photosensitive layer and formed between and in contact with the conductive support body and the photosensitive layer. The photosensitive layer is composed of either a single layer type photosensitive layer or a laminated type photosensitive layer.
    Type: Application
    Filed: February 1, 2008
    Publication date: September 11, 2008
    Applicant: Ricoh Company, Ltd
    Inventors: Seiji SARAYAMA, Tetsuya Toshine
  • Patent number: 7341812
    Abstract: An imaging member having a substrate, an electroconducting layer having an electroconducting particle of a core and outer shell, an interfacial layer, and a charge transport layer with charge transport materials dispersed therein.
    Type: Grant
    Filed: April 14, 2005
    Date of Patent: March 11, 2008
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Yuhua Tong, Geoffrey M T. Foley, Liang-Bih Lin, Jennifer Y. Hwang
  • Patent number: 7314694
    Abstract: An imaging member comprised of a hole blocking layer, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer is comprised of a metal alkyoxide, an amino siloxane, and at least one polymer binder containing epoxy groups.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: January 1, 2008
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, Nancy L. Belknap, John F. Yanus, Jin Wu
  • Patent number: 7229729
    Abstract: An electrophotographic photoreceptor having an intermediate layer in which the intermediate layer contains a compound formed from a composition containing the following components X, Y and Z.
    Type: Grant
    Filed: July 9, 2004
    Date of Patent: June 12, 2007
    Assignee: Konica Monolta Business Technologies, Inc.
    Inventors: Kazuhisa Shida, Masao Asano, Hiroshi Yamazaki, Akihiko Itami, Tomoo Sakimura
  • Patent number: 7010247
    Abstract: A coating liquid for an electrophotographic photoconductor intermediate layer comprising a titanium oxide and a polycarboxylic acid polymer in a solvent is provided. The content of the polycarboxylic acid polymer is 0.3 to 10 parts by weight in respect to 100 parts by weight of the titanium oxide, and an acid value of the polycarboxylic acid polymer is 30 to 400 mgKOH/g.
    Type: Grant
    Filed: July 14, 2005
    Date of Patent: March 7, 2006
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuo Suzuki, Akihiro Sugino
  • Patent number: 6888663
    Abstract: The invention relates to an optical component comprising a dispersion of layered minute particulate materials in a binder, the layered materials having a layer thickness, a concentration of particulate in the binder, and a basal plane spacing sufficient to provide a component having a light transmissivity of at least 50%.
    Type: Grant
    Filed: October 7, 2002
    Date of Patent: May 3, 2005
    Assignee: Eastman Kodak Company
    Inventors: Robert P. Bourdelais, Narasimharao Dontula, Debasis Majumdar, Cheryl J. Kaminsky