Patents Examined by Christopher D. Rodee
  • Carrier for electrostatic charge image development and two-component developer for electrostatic charge image development
    Patent number: 10156803
    Abstract: Provided is a carrier for electrostatic charge image development which provides a two-component developer having a high electric charge amount, a suppressed variation in an electric charge amount caused by an environmental change, and excellent durability, even if a low temperature fixable toner is used. A carrier for electrostatic charge image development of the present invention includes: carrier particles in which a core particle surface is coated with a coating material containing a resin, wherein the coating material contains phosphorus element, and the resin contains structural units derived from an alicyclic (meth)acrylic acid ester compound.
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: December 18, 2018
    Assignee: Konica Minolta, Inc.
    Inventors: Kosuke Nakamura, Satoshi Uchino, Futoshi Kadonome, Koji Shibata
  • Toner
    Patent number: 10156801
    Abstract: A toner, including: a colorant; a binder resin; and a releasing agent, wherein the binder resin includes a polyester resin, and the toner satisfies requirements (1) and (2) below: (1): G?(50)?3.0×107 Pa and 1.0×105 Pa?G?(60)?1.0×107 Pa, where G?(50) is a storage modulus at 50° C. of the toner and G?(60) is a storage modulus at 60° C. of the toner; and (2): a spin-spin relaxation time of the toner at 50° C. measured by solid echo method of pulse NMR is 1.0 ms or shorter.
    Type: Grant
    Filed: August 13, 2014
    Date of Patent: December 18, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Kohsuke Nagata, Shinya Nakayama, Tsuyoshi Sugimoto, Daisuke Asahina, Susumu Chiba
  • Electrostatic charge image developing toner set, electrostatic charge image developer set, and toner cartridge set
    Patent number: 10156799
    Abstract: An electrostatic charge image developing toner set includes an electrostatic charge image developing black toner that includes black toner particles including a black colorant, a binder resin, and a release agent, and inorganic particles containing an oil; and an electrostatic charge image developing color toner that includes color toner particles including a color colorant, a binder resin, and a release agent, and inorganic particles containing an oil, wherein a proportion of the release agent exposed to a surface of the color toner particles is greater than a proportion of the release agent exposed to a surface of the black toner particles.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: December 18, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Hiroki Ohmori, Yutaka Saito, Yuka Yamagishi, Fusako Kiyono
  • Magenta toner for electrostatic charge image development
    Patent number: 10146147
    Abstract: To provide a magenta toner for electrostatic charge image development including a crystalline polyester resin and an amorphous resin as a binder resin, which is a means for improving low temperature fixability, scattering properties, GI value, saturation, and light fastness. A magenta toner for electrostatic charge image development including an amorphous resin and a crystalline polyester resin as a binder resin, wherein predetermined quinacridone-based pigment, metal element-containing monoazo pigment, and naphthol AS-based pigment are included as a coloring agent, and the combined content of the quinacridone-based pigment and the metal element-containing monoazo pigment is 50-90% by mass of the total coloring agent.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: December 4, 2018
    Assignee: Konica Minolta, Inc.
    Inventors: Takanari Kayamori, Masaharu Matsubara, Naoya Tonegawa, Kouji Izawa, Atsushi Iioka
  • Electrostatic latent image developing toner
    Patent number: 10126669
    Abstract: A composite core of a toner particle is a composite of a toner core containing a polyester resin and a plurality of resin particles each containing a first resin. A shell layer partially covering a surface of the composite core is a film containing a second resin. The first resin has a glass transition point that is 10° C. or more higher than a glass transition point of the second resin. The plurality of resin particles each have a particle diameter that is 1.5 times or more greater than a thickness of the shell layer. An amount of the resin particles is at least 0.3 parts by mass and no greater than 2.0 parts by mass relative to 100 parts by mass of the toner cores. The resin particles have a positive zeta potential at pH 4.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: November 13, 2018
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Seishi Ojima
  • Quinone derivative and electrophotographic photosensitive member
    Patent number: 10126667
    Abstract: A quinone derivative is represented by general formula (1), (2), or (3). In general formulae (1), (2), and (3), R1, R2, R3, R4, R11, R12, R13, R14, R21, R22, R23, and R24 each represent, independently of one another, a hydrogen atom, a cyano group, a halogen atom, an optionally substituted alkyl group having a carbon number of 1-6, or an optionally substituted alkoxy group having a carbon number of 1-6. R5, R6, R15, R16, R25, and R26 each represent, independently of one another, an optionally substituted alkyl group having a carbon number of 1-6, an optionally substituted alkoxy group having a carbon number of 1-6, an optionally substituted aryl group having a carbon number of 6-14, an optionally substituted aralkyl group having a carbon number of 7-12, or an optionally substituted cycloalkyl group having a carbon number of 3-10.
    Type: Grant
    Filed: June 7, 2017
    Date of Patent: November 13, 2018
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Hideki Okada, Fumio Sugai, Kensuke Kojima
  • Charge control agent-silicone oils and uses thereof
    Patent number: 10126672
    Abstract: A charge control agent-silicone oil composition includes a silicone oil and a charge control agent, the charge control agent being covalently linked to the silicone oil or is homogenously dispersed in the silicone oil as a dispersion. A method includes reacting an electrophilically-activated silicone oil with a charge control agent, thereby covalently linking the charge control agent to the silicone oil to provide a charge control agent-functionalized silicone oil. A bio-based toner includes a resin blend that includes a petroleum based resin and a bio-based resin, a charge control agent-silicone oil, a colorant, and a silica and/or titania additive, the toner having a bio-content of greater than about 25% by weight and does not exhibit moisture sensitivity.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: November 13, 2018
    Assignees: XEROX CORPORATION, CLARKSON UNIVERSITY
    Inventors: Varun Sambhy, Juan A. Morales-Tirado, Santokh S. Badesha, Richard E. Partch
  • Additive manufacturing with integrated microliter resin delivery
    Patent number: 10118338
    Abstract: An additive manufacturing system utilizing an oxygen-permeable membrane to facilitate low-volume printing and high-speed resin change in a stereolithography-based 3D printer. The membrane is used to constrain the fluid surface at the focal plane of the stereolithography printer and a carrier fluid is used to hold the fluid against the membrane. The small amount of resin is quickly switched using integrated microfluidic channels.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: November 6, 2018
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: Joshua R. Deotte, Xiaoyu Zheng
  • Toner formulation using crystalline polyester encapsulated with a styrene acrylate latex and method of preparing the same
    Patent number: 10108101
    Abstract: The present disclosure relates to a chemically prepared toner composition including a toner particle having a core including a first polymer binder, an styrene acrylate encapsulated crystalline polyester latex, a pigment, and a shell formed around the core including a second polymer binder and method to make the same. The disclosed method of preparing the toner results in a change in the distribution of the components of the toner particle wherein the lower molecular weight resins, the pigment and the wax are located away from the surface of the toner particle and the pigment is clinging to the edge of the wax domain.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: October 23, 2018
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventors: Jing X Sun, Cory Nathan Hammond
  • Electrophotographic photosensitive member, method of producing electrophotographic photosensitive member, process cartridge, and electrophotographic image forming apparatus
    Patent number: 10095137
    Abstract: Provided is an electrophotographic photosensitive member that can suppress a ghost image while keeping its sensitivity satisfactory. The electrophotographic photosensitive member includes a support, an intermediate layer on the support, and a photosensitive layer on the intermediate layer, and the intermediate layer contains a compound having a specific structure.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: October 9, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takeshi Murakami, Daisuke Kawaguchi, Kazumichi Sugiyama, Daisuke Tanaka
  • Styrene/acrylate and polyester resin particles
    Patent number: 10095140
    Abstract: The present disclosure describes poly(styrene/acrylate)-polyester hybrid particles, wherein poly(styrene/acrylate) polymers are polymerized and entangled within a polyester seed particle in an interpenetrating polymer network.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: October 9, 2018
    Assignee: Xerox Corporation
    Inventors: Yanjia Zuo, Shigeng Li, Robert D Bayley, Peter V Nguyen, Linda S Schriever, Gregory K Thompson, Chieh-Min Cheng
  • Positively chargeable single-layer electrophotographic photosensitive member, process cartridge, and image forming apparatus
    Patent number: 10078276
    Abstract: A positively chargeable single-layer electrophotographic photosensitive member is used as an image bearing member in an image forming apparatus including a charging section configured to be in contact with the image bearing member to apply a voltage thereto. The positively chargeable single-layer electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer contains at least a charge generating material, a hole transport material, an electron transport material, and a binder resin. The hole transport material contains a triarylamine derivative represented by the following general formula (I). In general formula (I), R1, R2, m and n have the same meaning as R1, R2, m, and n defined in the description.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: September 18, 2018
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Hiroki Tsurumi, Eiichi Miyamoto
  • Electrostatic latent image developing white developer, image forming method, image forming apparatus, and process cartridge
    Patent number: 10067438
    Abstract: Provided is an electrostatic latent image developing white toner, including: a white toner including at least a binder resin, a white pigment, and a release agent; and a magnetic carrier including at least a core material, and a coating layer coating the core material and made of a coating resin and conductive particles, wherein Ra of the magnetic carrier is in a range of from 0.50 ?m to 1.00 ?m, and a bulk density of the magnetic carrier is in a range of from 2.08 g/cm3 to 2.24 g/cm3.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: September 4, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshihiro Murasawa, Hiroshi Tohmatsu, Hitoshi Iwatsuki, Mariko Takii, Koichi Sakata, Hiroyuki Kishida, Toyoaki Tano, Kenichi Mashiko
  • Engineering-grade consumable materials for electrophotography-based additive manufacturing system
    Patent number: 10061221
    Abstract: A method of printing three-dimensional parts with an electrophotography-based additive manufacturing system, with a part material including a composition having an engineering-grade thermoplastic material and a charge control agent. 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: November 29, 2016
    Date of Patent: August 28, 2018
    Assignee: Evolve Additive Solutions, Inc.
    Inventors: James E. Orrock, Steven A. Chillscyzn, Trevor I. Martin
  • Toner
    Patent number: 10054866
    Abstract: A toner having a toner particle containing a binder resin and a crystalline material, wherein when “a” is an endothermic quantity deriving from the crystalline material in a DSC of the toner and “b” is an endothermic quantity deriving from the crystalline material in a DSC of the toner that has been held for 10 hours in an environment with a temperature of 55° C. and a humidity of 8% RH, the “a” and “b” satisfy a relationship a/b?0.85; in a dynamic viscoelastic measurement of a non-melt-molded pellet of the toner, the toner has a temperature range A for which G??1×105 Pa and tan ?<1 are satisfied; and in a dynamic viscoelastic measurement of a melt-molded pellet of the toner, the toner has a temperature range B for which tan ?>1 is satisfied within the temperature range A.
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: August 21, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masatake Tanaka, Nobuhisa Abe, Hidekazu Fumita, Masashi Kawamura, Shiro Kuroki, Kenji Ookuba
  • Toner and method for manufacturing toner
    Patent number: 10048610
    Abstract: A toner containing a toner particle containing a binding resin and a colorant and an inorganic fine particle, in which the inorganic fine particle is a silica particle containing aluminum and the content of the aluminum in the silica particle is 0.2 ppm or more and 200 ppm or less.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: August 14, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Ichiro Kanno, Takeshi Hashimoto, Masayuki Hama, Hitoshi Sano, Nozomu Komatsu, Tsubasa Fujisaki, Takakuni Kobori, Hiroyuki Fujikawa
  • Electrostatic ink compositions
    Patent number: 10042277
    Abstract: Herein is disclosed a magenta liquid electrostatic ink composition comprising chargeable particles comprising a resin, a pigment, a liquid carrier in which the chargeable particles are dispersed, and a charge director, wherein the resin is formable from polymerizing alkylene monomers and methacrylic or acrylic acid monomers, the pigment is selected from pigment violet 19 type ?I pigment violet 19 type ?II pigment violet 19 type ?, pigment violet 19 type ?, pigment red 177, pigment red 208, pigment red 122 and pigment violet 32, and the liquid electrostatic ink composition lacks any other types of pigment. Also disclosed herein is a method of electrostatic printing and a print substrate having printed thereon the magenta liquid electrostatic ink composition.
    Type: Grant
    Filed: June 9, 2014
    Date of Patent: August 7, 2018
    Assignee: HP Indigo B.V.
    Inventors: Gil Bar-Haim, Alexey S. Kabalnov, Albert Teishev, Alina Grishman, Vladislav Kaploun, Danny Feldman, Eyal Bachar
  • Electrostatic ink compositions
    Patent number: 10042278
    Abstract: Herein is disclosed a magenta liquid electrostatic ink composition comprising a carrier liquid; and ink particles comprising a resin, a magenta pigment and a black pigment, wherein the black pigment is present in the composition in an amount of 0.01 to 0.5 wt % by total solids of the composition.
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: August 7, 2018
    Assignee: HP Indigo B.V.
    Inventors: Adi Vinegrad, Yaron Grinwald, Gil Bar-Haim, Mirta Perlman, Alina Grishman, Danny Feldman, Eyal Shelef
  • Electrostatic charge image developing toner
    Patent number: 10031433
    Abstract: An electrostatic charge image developing toner includes a toner matrix particle having a core-shell structure. The toner matrix particle contains: a core particle including an amorphous resin, a colorant, a release agent, and a crystalline resin; and a shell layer coating a surface of the core particle at a coverage of 60 to 99%. The shell layer includes an amorphous resin. The amorphous resin contained in the core particle differs from the amorphous resin contained in the shell layer. The toner matrix particle has one to seven discrete shell domains determined by observation of a cross section of the toner matrix particle with an electron microscope.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: July 24, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Atsushi Iioka, Takanari Kayamori, Naoya Tonegawa, Masaharu Matsubara, Kouji Sekiguchi
  • Electrophotographic photosensitive member
    Patent number: 10031431
    Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer contains at least a charge generating material, a charge transport material, and a binder resin. The binder resin includes a polyarylate resin. The polyarylate resin is represented by general formula (1) shown below. In general formula (1), X represents a divalent group represented by chemical formula (1-1), (1-2), (1-3), or (1-4) shown below.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: July 24, 2018
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Jun Azuma, Takahiro Oki, Kensuke Okawa, Akihiko Ogata