Applying Radiation-sensitive Layer Patents (Class 430/133)
  • Patent number: 10838313
    Abstract: An electrophotographic photosensitive member includes, in this order, a support, a charge generating layer having a thickness of more than 200 nm and containing a hydroxygallium phthalocyanine pigment or a chlorogallium phthalocyanine pigment as a charge generating material, and a charge transport layer containing a charge transporting material. The charge generating material satisfies a requirement for a specific parameter.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: November 17, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuko Araki, Kaname Watariguchi, Masataka Kawahara, Jumpei Kuno
  • Patent number: 10642113
    Abstract: A display device which is immune to a build-up of static electricity includes a display module and an anti-static layer. The anti-static layer is formed on a side surface of the display module. The anti-static layer includes an insulating layer on the side surface and a conductive layer stacked on the insulating layer. The conductive layer is electrically coupled to a conductive component of the display device.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: May 5, 2020
    Assignee: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Li-Chiao Huang, Jou-Hsuan Wu
  • Patent number: 10199226
    Abstract: There is provided a method for manufacturing a flexible electrode, the method comprising: cleaning a plastic substrate; forming a metal-oxide seed layer on the plastic substrate by sputtering a metal oxide on the plastic substrate; and forming a metal plating layer on the metal oxide seed layer using an electroless plating.
    Type: Grant
    Filed: June 7, 2017
    Date of Patent: February 5, 2019
    Assignee: Industry-Academic Corporation Foundation of ajou University
    Inventors: Chang-Koo Kim, Hae-Min Lee, Chang-Jin Park
  • Patent number: 9880477
    Abstract: 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.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: January 30, 2018
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventor: Akiteru Fujii
  • Patent number: 9834459
    Abstract: Devices and methods for electric field driven on-demand separation of liquid-liquid mixtures are provided. For example, methods for separating liquid-liquid mixtures, such as free oil and water, oil-in-water emulsions and water-in-oil emulsions, are provided that have separation efficiencies up to about 99.9%. The liquid-liquid mixture is contacted with a separator membrane assembly comprising a separator membrane formed of a porous oleophobic (or superoleophobic) material and an electrically conductive member. An electrical potential is applied across the porous oleophobic (or superoleophobic) material of the separator membrane to facilitate passage and separation of at least a portion of the first component through the separator membrane. Separation devices and such separator membrane assemblies are also provided.
    Type: Grant
    Filed: May 17, 2013
    Date of Patent: December 5, 2017
    Assignee: THE REGENTS OF THE UNIVERSITY OF MICHIGAN
    Inventors: Anish Tuteja, Arun Kumar Kota, Gibum Kwon
  • Patent number: 9285692
    Abstract: Disclosed is a positively-charged single-layer electrophotographic photoreceptor in which a photosensitive layer containing at least a binding resin and a charge transporting material is provided on a photosensitive layer support base with a wall thickness of 0.7 mm or less, wherein when the charge transporting material is solely constituted by a hole transporting material, a content of the hole transporting material is 110 parts by mass or less with respect to 100 parts by mass of the binding resin, and when the charge transporting material is constituted by a hole transporting material and an electron transporting material, a content of the hole transporting material is 130 parts by mass or less and a content of the electron transporting material is 5 parts by mass or more with respect to 100 parts by mass of the binding resin.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: March 15, 2016
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Yasufumi Mizuta, Kazunari Hamasaki, Keizo Kimoto
  • Patent number: 9217981
    Abstract: 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.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: December 22, 2015
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Keizo Kimoto, Sakae Saito, Yasufumi Mizuta, Kazunari Hamasaki, Syoji Itsumi, Hiroshi Takemoto
  • Patent number: 9195154
    Abstract: 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.
    Type: Grant
    Filed: June 13, 2013
    Date of Patent: November 24, 2015
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventor: Akiteru Fujii
  • Patent number: 9162250
    Abstract: The method for forming a coating film includes: supplying a first liquid from a nozzle to a cylindrical substrate to thereby form the coating film of the first liquid, wherein the method includes, pressing a member including a second liquid, to form a liquid film of the second liquid on the peripheral surface, and forming the coating film of the first liquid includes: supplying the first liquid onto the liquid film of the second liquid formed on the peripheral surface of the substrate to form a bead of the first liquid between the liquid-supplying unit and the liquid film of the second liquid, and extending the bead in a circumferential direction of the substrate.
    Type: Grant
    Filed: October 16, 2014
    Date of Patent: October 20, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Katsuya Abe, Yasuhiro Miyahara, Yuji Hasegawa
  • Patent number: 9046797
    Abstract: To provide a process for producing an electrophotographic photosensitive member that can not easily cause any fog due to an increase in dark attenuation, a conductive layer is formed with use of a coating liquid for conductive layer prepared with use of a solvent, a binder material and metal oxide particles. The metal oxide particles (P) and binder material (B) in the coating liquid for conductive layer are in a mass ratio (P/B) of from 1.5/1.0 to 3.5/1.0. The metal oxide particle is a titanium oxide particle coated with tin oxide doped with phosphorus or tungsten. Where powder resistivity of the metal oxide particle is represented by x (?·cm) and powder resistivity of the titanium oxide particle as a core particle constituting the metal oxide particle is represented by y (?·cm), the y and the x satisfy the following relations (i) and (ii): 5.0×107?y?5.0×109??(i) 1.0×102?y/x?1.0×106??(ii).
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: June 2, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Atsushi Fujii, Hideaki Matsuoka, Haruyuki Tsuji, Nobuhiro Nakamura, Kazuhisa Shida
  • Publication number: 20150147691
    Abstract: A photosensitive layer of an electrophotographic photosensitive member contains a hydroxygallium phthalocyanine crystal of a crystalline form having peaks at Bragg angles 2?±0.2° of 7.0°, 16.6°, 20.8°, and 26.9° in X-ray diffraction with CuK? radiation.
    Type: Application
    Filed: November 24, 2014
    Publication date: May 28, 2015
    Inventors: Tsutomu Nishida, Masato Tanaka, Masataka Kawahara
  • Patent number: 9040214
    Abstract: Provided are an electrophotographic photosensitive member in which leakage doesn't easily occur, a process cartridge and an electrophotographic apparatus each including the electrophotographic photosensitive member, and a method of manufacturing the electrophotographic photosensitive member. The electrophotographic photosensitive member includes a conductive layer including titanium oxide particle coated with tin oxide doped with a hetero element. When an absolute value of a maximum current amount flowing through the conductive layer in a case of performing a test of applying ?1.0 kV including DC voltage to the conductive layer is defined as Ia, and an absolute value of a current amount flowing through the conductive layer in a case where a decrease ratio of a current amount per minute reaches 1% or less for the first time is defined as Ib, the relations of Ia?6000 and 10?Ib are satisfied. A volume resistivity of the conductive layer before the test is 1.0×108 ?·cm to 5.0×1012 ?·cm.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: May 26, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Atsushi Fujii, Hideaki Matsuoka, Haruyuki Tsuji, Kazuhisa Shida, Nobuhiro Nakamura
  • Patent number: 9034554
    Abstract: Provided is a method of producing an electrophotographic photosensitive member having improved sensitivity and capable of outputting an image having less image defects due to a ghost phenomenon not only under a normal-temperature, normal-humidity environment but also under a low-temperature, low-humidity environment as a particularly severe condition. The method of producing a gallium phthalocyanine crystal includes subjecting a gallium phthalocyanine and a specific amine compound, which are added to a solvent, to a milling treatment to perform crystal transformation of the gallium phthalocyanine. In addition, the gallium phthalocyanine crystal is used in the photosensitive layer of the electrophotographic photosensitive member.
    Type: Grant
    Filed: November 29, 2012
    Date of Patent: May 19, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masato Tanaka, Masataka Kawahara, Kaname Watariguchi, Takeshi Murakami, Akira Yoshida
  • Patent number: 9029058
    Abstract: A support material for printing a support structure with an electrophotography-based additive manufacturing system, the support material including a composition having a charge control agent and a thermoplastic copolymer having aromatic groups, (meth)acrylate-based ester groups, carboxylic acid groups, and anhydride groups, with a high anhydride conversion. The composition is provided in a powder form having a controlled particle size, and the support material is configured for use in the electrophotography-based additive manufacturing system having a layer transfusion assembly for printing the support structure in a layer-by-layer manner, and is at least partially soluble in an aqueous solution.
    Type: Grant
    Filed: July 17, 2013
    Date of Patent: May 12, 2015
    Assignee: Stratasys, Inc.
    Inventor: Trevor I. Martin
  • Patent number: 9023566
    Abstract: A part material for printing three-dimensional parts with an electrophotography-based additive manufacturing system, the part material including a composition having a copolymer (including acrylonitrile units, butadiene units, and aromatic units), a charge control agent, and a heat absorber. The part material is provided in a powder form having a controlled particle size, and is configured for use in the electrophotography-based additive manufacturing system having a layer transfusion assembly for printing the three-dimensional parts in a layer-by-layer manner.
    Type: Grant
    Filed: July 17, 2013
    Date of Patent: May 5, 2015
    Assignee: Stratasys, Inc.
    Inventor: Trevor I. Martin
  • Patent number: 8993204
    Abstract: According to aspects of the present invention, an electrophotographic photosensitive member includes a surface layer comprising a cured resin obtained by polymerizing a compound having at least one polymerizable functional group. Aspects of the present invention provide an electrophotographic photosensitive member whose surface layer comprises a compound (urea derivative) having a certain structure, a method for producing the electrophotographic photosensitive member, and a process cartridge and an electrophotographic apparatus including the electrophotographic photosensitive member.
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: March 31, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaki Nonaka, Masato Tanaka, Masataka Kawahara, Michiyo Sekiya, Akira Yoshida
  • Publication number: 20150086921
    Abstract: A method for producing an electrophotographic photosensitive member in which leakage hardly occurs is provided. For this, in the method for producing an electrophotographic photosensitive member according to the present invention, a coating liquid for a conductive layer is prepared using a solvent, a binder material, and a metallic oxide particle having a water content of not less than 1.0% by mass and not more than 2.0% by mass; using the coating liquid for a conductive layer, a conductive layer having a volume resistivity of not less than 1.0×108 ?·cm and not more than 5.0×1012 ?·cm is formed; the mass ratio (P/B) of the metallic oxide particle (P) to the binder material (B) in the coating liquid for a conductive layer is not less than 1.5/1.0 and not more than 3.5/1.
    Type: Application
    Filed: June 17, 2013
    Publication date: March 26, 2015
    Inventors: Atsushi Fujii, Hideaki Matsuoka, Haruyuki Tsuji, Nobuhiro Nakamura, Kazuhisa Shida
  • Publication number: 20150079510
    Abstract: An electrophotographic photoreceptor having a photosensitive layer which includes, as a resin binder, a copolymeric polyarylate resin having structural units of a Chemical Structural Formula 1, a method of producing the photoreceptor, an electrophotographic device including the electrophotographic photoreceptor, and a method of preparing the copolymeric polyarylate resin are provided. The electrophotographic photoreceptor reduces the amount of abrasion at the surface of a photoreceptor drum and lowers frictional resistance from the beginning until the end of printing, and moreover provides good images.
    Type: Application
    Filed: February 28, 2012
    Publication date: March 19, 2015
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Fengqiang Zhu, Shinjiro Suzuki, Quanqiu Zhang, Seishi Terasaki
  • Patent number: 8980508
    Abstract: A charge-transporting layer, which is a surface layer of an electrophotographic photosensitive member, has a matrix-domain structure having a matrix containing constituent ? (a polyester resin having a predetermined repeating structural unit) and a charge-transporting substance, and a domain containing constituent ? (a polycarbonate resin having a repeating structural unit having a predetermined siloxane moiety).
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: March 17, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsushi Okuda, Harunobu Ogaki, Kazunori Noguchi, Shio Murai, Kazuhisa Shida, Takashi Anezaki
  • Patent number: 8980509
    Abstract: An electrophotographic photosensitive member comprises a charge-transporting layer which is a surface layer of the electrophotographic photosensitive member; wherein the charge-transporting layer has a matrix-domain structure having: a matrix comprising a component ? and a component ?, and a domain comprising a component ?.
    Type: Grant
    Filed: November 25, 2011
    Date of Patent: March 17, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazunori Noguchi, Takashi Anezaki, Kazuhisa Shida, Atsushi Okuda, Shio Murai, Harunobu Ogaki
  • Publication number: 20150064614
    Abstract: A photoreceptor includes a substrate a charge generating layer disposed on the substrate and a charge transport layer disposed on the charge generating layer, the charge transport layer includes a hole transport molecule, a fluorinated diol, and a leveling agent, the charge transport layer is substantially free of a polymer binder and catalyst, and has a post-discharge voltage of less than about 10 volts.
    Type: Application
    Filed: September 4, 2013
    Publication date: March 5, 2015
    Applicant: XEROX CORPORATION
    Inventors: Gregory McGuire, Sarah J. Vella, Adrien P. Cote, Yvan Gagnon, Brynn Dooley
  • Patent number: 8962227
    Abstract: An electrophotographic photosensitive member that includes the outermost surface layer formed by curing a mixture of a charge transporting substance having a chain-polymerizable functional group and a urea compound represented by the following formula (1) or (2), and a process cartridge and an electrophotographic apparatus each including the electrophotographic photosensitive member.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: February 24, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masato Tanaka, Masaki Nonaka
  • Patent number: 8951702
    Abstract: A charge transport material having reduced photodeterioration is disclosed to be an ethylene compound having an ethylene double bond site, having a structure in which four different substituents are substituted at the ethylene double bond site, and having general formula (I) below where R1, R2 and R3 are each independently a hydrogen atom, a halogen atom, an alkyl group of 1 to 6 carbons or an alkoxyl group of 1 to 6 carbons; R4 is phenyl or tolyl; and Ar is one group selected from the group consisting of naphthyl, biphenyl, anthryl, xylyl, and phenanthryl. An electrophotographic photoreceptor and process for producing the electrophotographic photoreceptor also are disclosed. The electrophotographic photoreceptor includes a conductive substrate; and a photosensitive layer provided on the conductive substrate that includes the charge transport material.
    Type: Grant
    Filed: July 9, 2009
    Date of Patent: February 10, 2015
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Fengqiang Zhu, Yoichi Nakamura, Ikuo Takaki, Seizo Kitagawa, Shinjirou Suzuki
  • Publication number: 20150037732
    Abstract: The present teachings describe a process of forming a charge transport layer (CTL) coating dispersion. The process includes mixing a surfactant and a first organic solvent until the surfactant is completely solubilized. Fluoroplastic particles are added to the solubilized surfactant and first organic solvent while mixing to form a slurry. The slurry includes a particulate solid content of from about 5 weight percent to about 60 weight percent. The process includes mixing a base solution that includes a charge transport material, a binder, an antioxidant and a second organic solvent. The base solution is added to the slurry while mixing to form a CTL pre-mix dispersion.
    Type: Application
    Filed: August 1, 2013
    Publication date: February 5, 2015
    Applicant: Xerox Corporation
    Inventors: Lanhui Zhang, Lin Ma
  • Publication number: 20140369715
    Abstract: 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 (6) below.
    Type: Application
    Filed: September 2, 2014
    Publication date: December 18, 2014
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Quanqiu ZHANG, Shinjiro SUZUKI, Fengqiang ZHU, Masaru TAKEUCHI
  • Publication number: 20140322637
    Abstract: In an electrophotographic photosensitive member including a charge-generating layer, the charge-generating layer has a matrix-domain structure; in the matrix-domain structure, the domain contains a charge-generating substance, and the matrix contains a binder resin and a fluoranthene compound.
    Type: Application
    Filed: April 28, 2014
    Publication date: October 30, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Junpei Kuno, Takeshi Murakami, Tsutomu Nishida, Masataka Kawahara, Kaname Watariguchi
  • Patent number: 8815479
    Abstract: An electrophotographic photosensitive member comprises a charge-transporting layer which is a surface layer of the electrophotographic photosensitive member; wherein the charge-transporting layer has a matrix-domain structure having: a matrix comprising a component [?] and a component [?] (charge-transporting substances having specific structures), and a domain comprising a component [?](resin [?1], or resin [?1] and resin [?2]).
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: August 26, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuhisa Shida, Atsushi Okuda, Kazunori Noguchi, Takashi Anezaki, Harunobu Ogaki, Shio Murai
  • 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
  • Publication number: 20140212807
    Abstract: A method for producing an electrophotographic photosensitive member having a charge transporting layer, the charge transporting layer being a surface layer, the method including drying a coat of a charge-transporting-layer coating liquid to form the charge transporting layer, wherein the charge-transporting-layer coating liquid contains components (?), (?), (?) and (?), and when the solubility of the component (?) in 100 g of the component (?) is defined as X(g) and the solubility of the component (?) in 100 g of the component (?) is defined as Y(g), solubility X and solubility Y satisfy a relationship of X>Y.
    Type: Application
    Filed: January 21, 2014
    Publication date: July 31, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Daisuke Miura, Daisuke Tanaka, Kazumichi Sugiyama
  • Publication number: 20140154618
    Abstract: A charge-transporting layer of an electrophotographic photosensitive member contains a charge-transporting substance, a resin A having a specific structural unit and a resin C having a specific structural unit as resins, and a compound D having a specific structural unit, and the charge-transporting layer contains domains containing the resin A1, the resin A2 and the compound D in a matrix containing the charge-transporting substance and the resin C.
    Type: Application
    Filed: November 13, 2013
    Publication date: June 5, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Akihiro Maruyama, Harunobu Ogaki, Yuki Yamamoto
  • Publication number: 20140154617
    Abstract: A charge-transporting layer of an electrophotographic photosensitive member has a matrix-domain structure having a domain which comprises at least one resin selected from the group consisting of a resin A1 a resin A2 and a specific silicone oil, and a matrix which comprises resin C and a charge-transporting substance, wherein a content of the structural unit represented by the formula (A-1) and the structural unit represented by the formula (A-2) is from 10% by mass to 40% by mass based on the total mass of the resin A1 and the resin A2.
    Type: Application
    Filed: November 12, 2013
    Publication date: June 5, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Akihiro Maruyama, Harunobu Ogaki, Yuki Yamamoto
  • Publication number: 20140141363
    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 (chain polymerizable functional group).
    Type: Application
    Filed: November 18, 2013
    Publication date: May 22, 2014
    Inventors: Masaki Nonaka, Hideaki Nagasaka, Masato Tanaka
  • Patent number: 8728690
    Abstract: A photoreceptor charge transport layer containing a spirodilactam and/or a lubricant has superior wear resistance.
    Type: Grant
    Filed: October 23, 2010
    Date of Patent: May 20, 2014
    Assignee: Xerox Corporation
    Inventor: Jin Wu
  • Publication number: 20140093815
    Abstract: A charge-transporting layer includes a matrix-domain structure. The domain contains a polyester resin A. The matrix contains a charge-transporting substance and at least one of a polyester resin C and a polycarbonate resin D.
    Type: Application
    Filed: September 18, 2013
    Publication date: April 3, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Yuki Yamamoto, Harunobu Ogaki, Akihiro Maruyama
  • Patent number: 8669027
    Abstract: The present invention is an electrophotographic photosensitive member including a charge-transporting layer as the surface layer of the electrophotographic photosensitive member having a matrix-domain structure including: a matrix including a component ? (at least one resin of a polycarbonate resin C having a specific repeating structural unit and a polyester resin D having a specific repeating structural unit), and ? (charge-transporting substance having a specific structure); and a domain including a component ? (polycarbonate resin A having a repeating structural unit containing a specific siloxane moiety).
    Type: Grant
    Filed: October 5, 2011
    Date of Patent: March 11, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Anezaki, Kazunori Noguchi, Shio Murai, Kazuhisa Shida, Atsushi Okuda, Harunobu Ogaki
  • Patent number: 8669030
    Abstract: A photoreceptor including an electroconductive substrate; a photosensitive layer which is located overlying the electroconductive substrate and which is not radically crosslinked; and an outermost layer which is located overlying the photosensitive layer and which includes a radically crosslinked material, wherein the radically crosslinked material includes a unit having a specific formula. An image forming method, an image forming apparatus, and a process cartridge, which use the photoreceptor.
    Type: Grant
    Filed: December 11, 2007
    Date of Patent: March 11, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Yukio Fujiwara, Tetsuro Suzuki, Kazukiyo Nagai, Hiroshi Tamura, Hiroshi Ikuno, Hidetoshi Kami
  • 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
  • Publication number: 20140038093
    Abstract: A photoconductor and method of forming a photoconductor comprising forming a charge generation material comprising a plurality of quantum dots, and forming an active region comprising one or more photoconductor layers comprising the charge generation material including the quantum dots is disclosed.
    Type: Application
    Filed: August 2, 2012
    Publication date: February 6, 2014
    Inventors: Farzad Parsapour, Juzo Kuriyama, Rodney Loyd
  • Publication number: 20140023962
    Abstract: A charge-transporting layer, which is a surface layer of an electrophotographic photosensitive member, has a matrix-domain structure having a matrix containing constituent ? (a polyester resin having a predetermined repeating structural unit) and a charge-transporting substance, and a domain containing constituent ? (a polycarbonate resin having a repeating structural unit having a predetermined siloxane moiety).
    Type: Application
    Filed: March 30, 2012
    Publication date: January 23, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Atsushi Okuda, Harunobu Ogaki, Kazunori Noguchi, Shio Murai, Kazuhisa Shida, Takashi Anezaki
  • Patent number: 8597864
    Abstract: Provided is a photoreceptor for electrophotography, a process for producing the photoreceptor, and an electrophotographic apparatus that includes the photoreceptor. The photoreceptor has a photosensitive layer which contains a resin binder that is a copolymerized polyallylate resin. An electrophotographic apparatus having a photoreceptor drum that includes this photoreceptor has a reduced surface frictional resistance throughout the printing period from the beginning to after printing, thus reducing the amount of surface wear while producing satisfactory images.
    Type: Grant
    Filed: February 16, 2009
    Date of Patent: December 3, 2013
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Shinjiro Suzuki, Yoichi Nakamura, Seizo Kitagawa, Fengqiang Zhu, Kazuki Nebashi
  • Publication number: 20130316278
    Abstract: Provided are an electrophotographic photoconductor that satisfies sufficient wear resistance as well as various characteristics as a photoconductor, and that is little affected by harmful gas or the temperature and humidity environment, and a method for producing such an electrophotographic photoconductor. The electrophotographic photoconductor has at least a photosensitive layer on a conductive substrate. The photosensitive layer contains a diadamantyl diester compound represented by Formula (I) (in Formula (I), R1, R2 and R3 each independently represent a hydrogen atom, a halogen atom, a substituted or unsubstituted C1-C6 alkyl group, a substituted or unsubstituted C1-C6 alkoxyl group, a C6-C20 aryl group or a heterocyclic group; l, m and n each represent an integer from 1 to 4; U and W represent a single bond or a substituted or unsubstituted C1-C6 alkylene group; and V represents an OCO group or a COO group).
    Type: Application
    Filed: December 9, 2010
    Publication date: November 28, 2013
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Fengqiang Zhu, Shinjiro Suzuki, Masaru Takeuchi, Quanqiu Zhang
  • Publication number: 20130316283
    Abstract: To provide a process for producing an electrophotographic photosensitive member that can not easily cause any fog due to an increase in dark attenuation, a conductive layer is formed with use of a coating liquid for conductive layer prepared with use of a solvent, a binder material and metal oxide particles. The metal oxide particles (P) and binder material (B) in the coating liquid for conductive layer are in a mass ratio (P/B) of from 1.5/1.0 to 3.5/1.0. The metal oxide particle is a titanium oxide particle coated with tin oxide doped with phosphorus or tungsten. Where powder resistivity of the metal oxide particle is represented by x (?·cm) and powder resistivity of the titanium oxide particle as a core particle constituting the metal oxide particle is represented by y (?·cm), the y and the x satisfy the following relations (i) and (ii): 5.0×107?y?5.0×109??(i) 1.0×102?y/x?1.0×106??(ii).
    Type: Application
    Filed: March 1, 2012
    Publication date: November 28, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Atsushi Fujii, Hideaki Matsuoka, Haruyuki Tsuji, Nobuhiro Nakamura, Kazuhisa Shida
  • Patent number: 8568952
    Abstract: The present teachings describe a process for mixing comprising obtaining a dispersion of solid particles and an organic solvent wherein the dispersion comprises a particulate solid content of from about 0.5 weight percent to about 10 weight percent. The dispersion is mixed at a resonant frequency of the mixing system.
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: October 29, 2013
    Assignee: Xerox Corporation
    Inventors: Cuong Vong, Marko Saban, Vladislav Skorokhod, Lanhui Zhang, Lin Ma, Norman Chi Su, Zhen Lai
  • Publication number: 20130216942
    Abstract: A polycarbonate composition for an electrophotographic photoreceptor coating, wherein the polycarbonate includes 1 to 100 mole percent of first units of the formula and 0 to 99 mole percent of one or more second units of the formula and wherein the polycarbonate has a weight average molecular weight of at least 50,000 g/mole, and a polydispersity index of 1 to 5.
    Type: Application
    Filed: February 17, 2012
    Publication date: August 22, 2013
    Inventors: Mohd Shamsul Hairi bin Mohd SALLEH, James Franklin HOOVER, Andries J.P. VAN ZYL, Robert Dirk VAN DE GRAMPEL, Jan-Pleun LENS
  • Publication number: 20130202326
    Abstract: An electrophotographic photosensitive member comprises a charge-transporting layer which is a surface layer of the electrophotographic photosensitive member; wherein the charge-transporting layer has a matrix-domain structure having: a matrix comprising a component [?] and a component [?] (charge-transporting substances having specific structures), and a domain comprising a component [?](resin [?1], or resin [?1] and resin [?2]).
    Type: Application
    Filed: October 25, 2011
    Publication date: August 8, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Kazuhisa Shida, Atsushi Okuda, Kazunori Noguchi, Takashi Anezaki, Harunobu Ogaki, Shio Murai
  • Patent number: 8486592
    Abstract: A radiation-sensitive material comprising a support and a radiation sensitive composition on the support is disclosed, wherein the radiation sensitive composition includes a dispersion containing nanoparticles of a sensitizer.
    Type: Grant
    Filed: March 22, 2010
    Date of Patent: July 16, 2013
    Assignee: ISP Investments Inc.
    Inventors: Hsiao-Yi Shih, Guojin Lu, David F. Lewis, Xiang Yu
  • Publication number: 20130137027
    Abstract: An organic photoconductor includes an inner charge generation layer for generating charges and an outer charge transport layer for facilitating charge transport. The charge transport layer comprises a semi-interpenetrating hole-transport polymer or oligomer network in which the polymer or oligomer is cross-linked. A process for forming a charge transport layer in an organic photoconductor is also provided.
    Type: Application
    Filed: November 30, 2011
    Publication date: May 30, 2013
    Inventors: Zhang-Lin Zhou, Krzysztof Nauka, Hou T. Ng
  • Publication number: 20130040234
    Abstract: An electrophotographic photoreceptor includes a conductive substrate; and a photosensitive layer provided on the conductive substrate and containing a resin binder that is a polycarbonate resin having structural units represented by General Formulae (1) and (2). The electrophotographic photoreceptor reduces the amount of wear and provides good images while maintaining a low frictional resistance on the surface of a photoreceptor drum from the beginning until after printing. A method for manufacturing such an electrophotographic photoreceptor includes applying a coating liquid containing at least such a resin binder onto a conductive substrate to thereby form a photosensitive layer. An electrophotographic device is disclosed that is equipped with such an electrophotographic photoreceptor.
    Type: Application
    Filed: January 27, 2011
    Publication date: February 14, 2013
    Applicant: Fuji Electric Co., Ltd.
    Inventors: Quanqiu Zhang, Shinjiro Suzuki, Yoichi Nakamura
  • Patent number: 8372567
    Abstract: In an electrophotographic photoreceptor having a photosensitive layer on an electroconductive substrate, the photosensitive layer is a positive-charging laminate comprising at least a charge transport layer and a charge generating layer laminated in that order, with the charge generating layer containing at least a resin binder, a charge generating agent, a space filler and an electron transport agent, while the charge transport layer contains at least, as a resin binder, polystyrene and a hole transport agent, and mineral oil of the charge transport layer is in an amount of 1% by mass or less of an amount of polystyrene. Thus, a highly durable and economic positive-charging multilayer electrophotographic photoreceptor and a manufacturing method therefor may be achieved.
    Type: Grant
    Filed: May 28, 2009
    Date of Patent: February 12, 2013
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Yoichi Nakamura, Seizo Kitagawa, Hiroshi Emori, Yasushi Tanaka, Hiroyuki Ichiyanagi
  • Publication number: 20130029266
    Abstract: The present invention provides a method for producing an electrophotographic photosensitive member including a surface layer, the method including the steps of: forming a coat for the surface layer on the support by applying a surface-layer coating solution and forming the surface layer by drying the coat, wherein the surface-layer coating solution includes a resin ?, a resin ?, a solvent ? and a compound ?.
    Type: Application
    Filed: June 8, 2012
    Publication date: January 31, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Kazumichi Sugiyama, Daisuke Tanaka, Tsutomu Nishida