Identified Developer (e.g., Resin-coated Pigment Structure, Etc.) Patents (Class 430/118.6)
  • Patent number: 10405103
    Abstract: An electret element includes: an electret film that contains silicon oxide; and a protective film formed over the electret film and constituted of aluminum oxide deposited through an atomic layer deposition method.
    Type: Grant
    Filed: September 13, 2018
    Date of Patent: September 3, 2019
    Assignees: National University Corporation Shizuoka University, Saginomiya Seisakusho, Inc.
    Inventors: Gen Hashiguchi, Yuki Nishimori, Shinichi Arioka, Masato Suzuki, Kazunori Ishibashi
  • Publication number: 20140147783
    Abstract: A liquid electrophotographic ink is disclosed. The liquid electrophotographic ink includes a carrier liquid, a polymer resin, and a pearlescent pigment particle.
    Type: Application
    Filed: November 20, 2013
    Publication date: May 29, 2014
    Inventors: Doris Chun, Hou T. Ng, Quang P. Lam
  • Patent number: 8715898
    Abstract: An electrostatic charge image developer includes a toner for developing an electrostatic charge image, containing toner particles including a polyester resin having a rosin skeleton and an external additive, and a carrier having core material particles and a coating resin layer which coats the surface of the core material particles, in which the hardness of the coating resin layer is from 1.2 times to 2.0 times that of the toner particles.
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: May 6, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Kazuhiko Yanagida
  • Patent number: 8628904
    Abstract: The present invention provides a carrier for replenishment including an associated particle in which single particles each having a core material and a resin layer covering the core material, are bound via the resin layer, the carrier being used in a developer for replenishment of a trickle development system, and the system including performing development while the developer for replenishment is replenished, upon development of a latent image on a latent image holding member using a development unit.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: January 14, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Moegi Iguchi, Satoshi Inoue, Koutarou Yoshihara, Masahiro Takagi
  • Patent number: 8617783
    Abstract: An ink contains dispersed particles, individually including at least one thermoplastic first resin exhibiting a MFI less than or equal to 100, at least one thermoplastic second resin exhibiting a MFI greater than 100, and a white pigment. A liquid toner producing method includes forming a paste containing the resins, combining the paste with a white pigment, and after combining the paste and pigment, applying a shear force, encapsulating the pigment, and dispersing the encapsulated pigment. A digital printing method includes providing a liquid marking agent containing charged particles dispersed in a carrier liquid, individual particles including at least one thermoplastic first resin and at least one thermoplastic second resin encapsulating a white pigment, and printing a hard image on a substrate. At least a portion of the image has a white color.
    Type: Grant
    Filed: July 23, 2009
    Date of Patent: December 31, 2013
    Assignee: Hewlett-Packard Indigo B.V.
    Inventors: Galia Golodetz, Gal Victor
  • Patent number: 8518622
    Abstract: A toner containing a binder resin, a colorant, and a releasing agent, wherein the colorant contains a mixed crystal of a C. I. PIGMENT YELLOW 185 and a C. I. PIGMENT YELLOW 139, and wherein a mass ratio of the C. I. PIGMENT YELLOW 185 to the C. I. PIGMENT YELLOW 139 (mass of the C. I. PIGMENT YELLOW 185/mass of the C. I. PIGMENT YELLOW 139) in the toner is 95/5 to 50/50.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: August 27, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Satoshi Ogawa, Daisuke Inoue, Daisuke Ito, Osamu Uchinokura, Junichi Awamura, Teruki Kusahara, Satoshi Kojima, Mamoru Hozumi, Shoko Sato
  • Patent number: 8334341
    Abstract: An object of the present invention is to provide a carbodiimide type compound having high dispersibility and dispersion stability of pigments, fine resin particles, and pigment-resin composite fine particles particularly in a silicone dispersion medium; a pigment dispersion composition and a pigment-resin composite fine particles-containing dispersion composition preferably usable in a wide range of fields such as inks for solvent ink jet, liquid developers, and the like by using the compound; and a liquid developer using such a pigment dispersion composition and/or pigment-resin composite fine particles-containing dispersion composition. The present invention provides a carbodiimide type compound obtained by introducing a polysiloxane chain by reaction of a functional group of a polysiloxane chain-containing compound having the functional group reactive with a carbodiimide group with a carbodiimide group of a carbodiimide compound having a carbodiimide equivalent weight of 100 to 50000.
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: December 18, 2012
    Assignee: Sakata INX Corp.
    Inventors: Hideo Shibata, Koji Iwase, Hirohito Maeda, Takaaki Yodo
  • Patent number: 8232037
    Abstract: A method for printing a substrate by liquid developer electrography, the method comprising: (a) developing a latent image with liquid developer comprising toner particles dispersed in a carrier liquid, said toner particles comprising UV-curable additive; (b) transferring the developed image to the substrate; (c) at least partially fixing the image to the substrate; and (d) irradiating the at least partially fixed image with UV radiation to cure the UV-curable additive.
    Type: Grant
    Filed: October 31, 2006
    Date of Patent: July 31, 2012
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Muhammad Iraqi, Albert Teishev, Gregory Katz
  • Patent number: 7883825
    Abstract: An image forming apparatus which forms an image onto a recording medium using a liquid developer which contains an insulation liquid and toner particles dispersed in the insulation liquid is provided. The image forming apparatus includes a liquid developer storage section for storing the liquid developer therein; a developing section for developing a toner image using the liquid developer supplied from the liquid developer storage section; an image transfer section for transferring the developed toner image formed by the developing section onto the recording medium to form a transferred image thereon; and a fixing section for fixing the transferred image formed on the recording medium onto the recording medium, wherein at least a part of the insulation liquid in the transferred image is oxidized and polymerized to fix the toner particles in the transferred image onto the recording medium. According to the image forming apparatus, it is possible to fix the toner particles onto the recording medium firmly.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: February 8, 2011
    Assignee: Seiko Epson Corporation
    Inventor: Koji Akioka
  • Patent number: 7851117
    Abstract: It is an object of the present invention to provide a liquid developer in which in liquid developers for electrophotography or electrostatic recording obtained using the coacervation method, electric resistance of the liquid developer and the electrophoretic property or the charging characteristic of the toner particles are adequately maintained, and the dispersibility of a pigment and the dispersion stability of the toner particles are good. A liquid developer formed by dispersing colored resin particles comprising at least a pigment, a dispersant and a resin in a hydrocarbon insulating medium using a coacervation method, wherein said dispersant is a carbodiimide compound having at least one basic nitrogen-containing group and at least one polyester side chain introduced through a reaction with a carbodiimide group in its molecule, and said resin is an acid group-containing resin and the acid value of the resin is 1 to 100.
    Type: Grant
    Filed: November 24, 2006
    Date of Patent: December 14, 2010
    Assignee: Sakata Inx Corp.
    Inventors: Takaaki Yodo, Katsutoshi Okamoto, Hideo Shibata, Koji Iwase
  • Publication number: 20070298336
    Abstract: A carrier coating that may be used to coat carrier particles, including a specific additive that imparts the coating with superior storage stability and wherein the carrier coating includes an acrylic-based polymeric powder obtained from an emulsion of an acrylic-based polymer, a surfactant, a cationic initiator, and a conductive filler.
    Type: Application
    Filed: June 23, 2006
    Publication date: December 27, 2007
    Applicant: Xerox Corporation
    Inventors: Robert Bayley, Grazyna Kmiecik-Lawrynowicz, Maura Sweeney