Patents Examined by Peter Vajda
  • Patent number: 9798256
    Abstract: A method of producing a toner includes preparing a resin solution containing a binder resin, a colorant and an organic solvent; forming a droplet, a surface of the droplet being covered with a resin fine particle L1; introducing a resin fine particle L2; pressuring by introducing carbon dioxide, and extracting the organic solvent in the droplet; and obtaining the toner particle by removing the carbon dioxide together with the extracted organic solvent, wherein the SP value of the resin R1 constituting the resin fine particle L1 and the SP value of the resin R2 constituting the resin fine particle L2 are each within a specific range.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: October 24, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yusuke Kosaki, Noritaka Toyoizumi, Tetsuya Kinumatsu, Kenji Aoki, Shuntaro Watanabe, Takaaki Kaya, Atsushi Tani, Takashige Kasuya
  • Patent number: 9798255
    Abstract: A process is provided comprising forming a phase inversed resin emulsion comprising a resin, water, and an organic solvent, wherein the process excludes subjecting the phase inversed resin emulsion to an organic solvent removal technique, thereby retaining the organic solvent in the phase inversed resin emulsion. The phase inversed resin emulsion may be formed by dissolving a resin in an organic solvent to form a resin mixture; optionally, adding a neutralizing agent to the resin mixture to neutralize acid groups on the resin; and adding a sufficient amount of water to the resin mixture to emulsify and induce phase inversion in the resin mixture. Also provided are processes for preparing particles and processes for preparing toners utilizing the phase inversed resin emulsions.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: October 24, 2017
    Assignee: Xerox Corporation
    Inventors: Yulin Wang, Shigang S. Qiu, Chieh-Min Cheng, Kathryne S. Brockman
  • Patent number: 9798257
    Abstract: A method for removing volatile organic compounds (VOC's) from toner slurries is described, including the isolated toner particles generated by that method.
    Type: Grant
    Filed: December 3, 2015
    Date of Patent: October 24, 2017
    Assignee: Xerox Corporation
    Inventors: Matthew W Croteau, Mark A Jackson, Roger B B Keeble, Harold R Judd, Munir Salman, Vincenzo G Marcello, Chieh-Min Cheng, Steven M Malachowski, Grazyna Kmiecik-Lawrynowicz, Linda S Schriever
  • Patent number: 9791798
    Abstract: An electrostatic latent image developing toner includes a plurality of toner particles each including a core containing a binder resin and a shell layer covering a surface of the core. The shell layer contains a copolymer of at least two compounds including a compound represented by formula (1) shown below. In the formula (1), R11 represents a hydrogen atom or an optionally substituted alkyl group having a carbon number of at least 1 and no greater than 8, and R12 represents an optionally substituted linear alkyl group having a carbon number of at least 8 and no greater than 22.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: October 17, 2017
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Haruhiro Nishitera
  • Patent number: 9785064
    Abstract: A part material for printing three-dimensional parts with an electrophotography-based additive manufacturing system, the part material including a composition having a semi-crystalline 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: July 16, 2014
    Date of Patent: October 10, 2017
    Assignee: Stratasys, Inc.
    Inventors: James E. Orrock, Steven A. Chillscyzn, Trevor I. Martin
  • Patent number: 9778581
    Abstract: An electrophotographic photosensitive member includes a hole transporting layer containing a polyester resin having a structural unit expressed by formula (1) as a hole transporting substance.
    Type: Grant
    Filed: January 28, 2015
    Date of Patent: October 3, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yota Ito, Takashi Anezaki, Daisuke Miura, Hirofumi Kumoi
  • Patent number: 9778586
    Abstract: The present invention provides a magnetic carrier for an electrophotographic developer which has an excellent durability and a stable charging property and is free from occurrence of spent toner thereonto, and a two-component system developer comprising the magnetic carrier for an electrophotographic developer and a toner. The present invention relates to a core material of a magnetic carrier for an electrophotographic developer comprising spherical composite particles comprising at least ferromagnetic iron oxide fine particles and a cured phenol resin and having an average particle diameter of 1 to 100 ?m, a resin index of the spherical composite particles being within the range of 35 to 80%, and a magnetic carrier obtained by coating a surface of respective particles of the magnetic carrier core material with a resin.
    Type: Grant
    Filed: April 12, 2012
    Date of Patent: October 3, 2017
    Assignee: TODA GOKYO CORPORATION
    Inventors: Kaori Kinoshita, Eiichi Kurita
  • Patent number: 9772568
    Abstract: Provided is an electrophotographic photosensitive member including a support, an undercoat layer, and a photosensitive layer in this order, in which: the undercoat layer does not contain a metal oxide, or contains the metal oxide but the content of the metal oxide in the undercoat layer is 10 mass % or less; and the undercoat layer contains a polymerized product of a composition containing at least one kind of anthraquinone derivative selected from the group consisting of a compound represented by the formula (1) and a compound represented by the formula (2).
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: September 26, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kunihiko Sekido, Michiyo Sekiya, Kei Tagami, Masashi Nishi
  • Patent number: 9772573
    Abstract: A toner includes a plurality of toner particles each having a core and a shell layer residing on a surface of the core. Each of the toner particles has a distribution of surface potential, as measured by a scanning probe microscope with respect to a 1 ?m2 region of the toner particle in a state where no external additive adheres thereto, satisfying that the surface potential is at least Vmin+?V×0.4 in at least 70% and no greater than 95% of the 1 ?m2 region, where ?V denotes a potential difference calculated by subtracting a minimum surface potential Vmin of the 1 ?m2 region from a maximum surface potential Vmax of the 1 ?m2 region.
    Type: Grant
    Filed: January 16, 2015
    Date of Patent: September 26, 2017
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Noriaki Sakamoto
  • Patent number: 9766567
    Abstract: An electrostatic-image developing toner contains toner particles and particles of a metallic salt of a fatty acid deposited on the toner particles. The particles of the metallic salt of the fatty acid contain 0.0008% to 0.01% by mass of iron.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: September 19, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Mona Tasaki, Fusako Kiyono, Yutaka Saito, Hiroki Ohmori, Yuka Yamagishi
  • Patent number: 9760033
    Abstract: Provided is a toner for developing electrostatic images containing toner particles. The toner particles contain a crystalline resin and an amorphous resin. The amorphous resin contains an amorphous vinyl resin component containing a polymer of monomers having a structure represented by formula (1). The content of a structural unit derived from the monomers in the toner particles is within a range of 2.4 to 13.5 mass %. H2C?CR1—COOR2??(1) In formula (1), R1 represents a hydrogen atom or a methyl group and R2 represents a branched alkyl group having a carbon number of 8 or more.
    Type: Grant
    Filed: July 19, 2016
    Date of Patent: September 12, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventors: Junya Onishi, Shiro Hirano, Aya Shirai
  • Patent number: 9753386
    Abstract: A positively chargeable toner contains plural toner particles each containing a core, and a shell layer disposed over the core. The shell layer contains a first resin containing at least one repeating unit having an amide group, and a second resin containing at least one repeating unit having a quaternary ammonium cation. The toner attains a charge amount Q3 after stirring for 3 minutes and attains a charge amount Q30 after stirring for 30 minutes, and “Q30?Q3” and “20 ?C/g?Q3” are both satisfied. Assuming that a second mixture of 100 parts by mass of the standard carrier and 10 parts by mass of the toner charged to a saturated charge amount is born on a development roller to measure a charge amount distribution, an arithmetic mean X and a standard deviation Y of the charge amount distribution satisfy “Y/X?3.5”.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: September 5, 2017
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Haruhiro Nishitera
  • Patent number: 9746790
    Abstract: An electrophotographic photosensitive member includes a support and a photosensitive layer in this order. The photosensitive layer contains a chlorogallium phthalocyanine crystal represented by formula (1) in which at least one organic compound selected from N,N-dimethylformamide and dimethyl sulfoxide is contained. The content of the organic compound contained in the chlorogallium phthalocyanine crystal represented by the formula (1) is 0.10 mass % or more and 0.80 mass % or less based on a content of the chlorogallium phthalocyanine crystal represented by the formula (1).
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: August 29, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tsutomu Nishida, Masato Tanaka, Masataka Kawahara
  • Patent number: 9740124
    Abstract: Disclosed are toner compositions that contain an amorphous polyester resin, a crystalline polyester resin, a colorant and a wax, and where the crystalline polyester resin is subjected to nucleation with a rosin acid or the salt of a rosin acid.
    Type: Grant
    Filed: May 25, 2015
    Date of Patent: August 22, 2017
    Assignee: Xerox Corporation
    Inventors: Guerino G. Sacripante, Richard P. N. Veregin, Kimberly D. Nosella, Michael S. Hawkins
  • Patent number: 9740126
    Abstract: An electrostatic charge image developing toner includes a binder resin, C.I. Pigment Yellow 155, and toner particles containing at least one selected from dimethyl 2-aminoterephthalate and 1,4-bis(acetoacetylamino)benzene, wherein a total content of dimethyl 2-aminoterephthalate and 1,4-bis(acetoacetylamino)benzene in the toner particles is from 1 ppm to 500 ppm.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: August 22, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Masaki Iwase, Akira Matsumoto
  • Patent number: 9740130
    Abstract: An electrostatic charge image developing carrier includes a core particle and a resin coating layer coated on the core particle, wherein the resin coating layer contains a cationic surfactant and an anionic surfactant and a total content of the cationic surfactant and the anionic surfactant in the resin coating layer is from 0.1% by weight to 6.0% by weight with respect to the entire resin coating layer.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: August 22, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Norihito Fukushima, Takeshi Tanabe, Toshiaki Hasegawa
  • Patent number: 9740127
    Abstract: A toner includes a plurality of toner particles each including a toner core and a shell layer disposed over the surface of the toner core. The shell layer includes a thermosetting portion substantially composed of a water-insoluble thermosetting resin and a thermoplastic portion substantially composed of a water-insoluble thermoplastic resin. At least a part of the thermoplastic portion has a shape of a film with projections and recesses and is located on the surface of the toner core. At least a part of the thermosetting portion is located on the thermoplastic portion. The part of the thermosetting portion located on the thermoplastic portion has a shape of a film along the shape of the thermoplastic portion.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: August 22, 2017
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Ryotaro Komada, Masami Tsujihiro, Jun Hioki, Hideharu Hori
  • Patent number: 9740128
    Abstract: A positively chargeable toner for electrostatic latent image development includes toner particles. The toner particles each include a toner core containing boron nitride and a shell layer disposed over a surface of the toner core. The boron nitride is contained in an amount of no less than 0.05% by mass and no greater than 35% by mass relative to total mass of the toner core. The boron nitride has a thermal conductivity of no less than 40 W/m·K and no greater than 220 W/m·K.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: August 22, 2017
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Toshiki Takemori, Yukinori Nakayama, Masaki Okita, Hiroki Uemura, Takamichi Mori
  • Patent number: 9740129
    Abstract: Ferrite particles have, as a main component, a material represented by a composition formula MxFe3?xO4 (where M is at least one type of metal selected from a group made of Mg, Mn, Ca, Ti, Cu, Zn, Sr and Ni, 0<x<1), where the maximum height Rz of the particles falls within a range of 1.40 ?m to 1.90 ?m, and the degree of distortion Rsk of the particles falls within a range of ?0.25 to ?0.07. In this way, when the ferrite particles are used as the carrier of an electrophotographic image forming apparatus, even if an image formation speed is increased, the occurrence of a failure is reduced for a long period of time.
    Type: Grant
    Filed: October 29, 2014
    Date of Patent: August 22, 2017
    Assignees: DOWA ELECTRONICS MATERIALS CO., LTD., DOWA IP CREATION CO., LTD.
    Inventors: Shinya Sasaki, Yohei Ishikawa, Haruka Seki
  • Patent number: 9726993
    Abstract: An electrostatic charge image developing toner includes toner particles having a volume average particle diameter of 3 ?m to 16 ?m, wherein, when the toner particles having a particle diameter of 1.0 ?m to 30.0 ?m are set as T1, the toner particles having a particle diameter of 1.0 ?m to 2.5 ?m are set as T2, a rate of T2 to the toner particles is set as A, the toner particles having a particle diameter of 1.0 ?m to 5 ?m is set as T3 and a rate of T3 to the toner particles is set as B, the rate of T2 occupying T1 is from 10% by number to 40% by number and a fine particle ratio C represented by A/B is from 0.18 to 0.40.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: August 8, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Shinichi Yaoi, Yasushige Nakamura