Patents by Inventor Ryotaro KOMADA

Ryotaro KOMADA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20160274479
    Abstract: An electrostatic latent image developing toner includes a plurality of toner particles each including a core and a shell layer. The shell layer is disposed over a surface of the core. The shell layer is substantially formed by a resin. The shell layer has a surface including a plurality of spot regions and a sheet region that is more hydrophobic than the spot regions. The spot regions each are more chargeable than the sheet region.
    Type: Application
    Filed: March 16, 2016
    Publication date: September 22, 2016
    Applicant: KYOCERA Document Solutions Inc.
    Inventors: Masami TSUJIHIRO, Jun HIOKI, Ryotaro KOMADA, Yusuke WASHINO, Haruhiro NISHITERA
  • Publication number: 20160252835
    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: Application
    Filed: February 19, 2016
    Publication date: September 1, 2016
    Applicant: KYOCERA Document Solutions Inc.
    Inventors: Ryotaro KOMADA, Masami TSUJIHIRO, Jun HIOKI, Hideharu HORI
  • Patent number: 9383670
    Abstract: A toner includes a plurality of toner particles each having a core and a shell layer on a surface of the core. In a cross section of the toner particle analyzed by EELS, for at least 50% of a circumferential length of the core, the shell layer has one or more portions each satisfying conditions that: a ratio of INc to INs is no less than 0.0 and no greater than 0.2; and a thickness of the shell layer is at least 5 nm. Here, INs indicates an intensity of an N-K shell absorption-edge originating from nitrogen atoms in the shell layer, and INc indicates an intensity of an N-K shell absorption-edge originating from nitrogen atoms in the core. In addition, the longest length among the one or more portions of the shell layer each satisfying the conditions is at least 100 nm.
    Type: Grant
    Filed: October 23, 2014
    Date of Patent: July 5, 2016
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Masami Tsujihiro, Ryotaro Komada
  • Patent number: 9329509
    Abstract: An electrostatic latent image developing toner contains toner particles each including a toner core containing a binder resin, and a shell layer coating the surface of the tore core. The shell layer contains a unit derived from a monomer of a thermosetting resin, and a unit derived from a thermoplastic resin. The resin contained in the shell layer has a unit derived from one or more monomers of thermosetting resins selected from the group of amino resins consisting of a melamine resin, a urea resin, and a glyoxal resin.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: May 3, 2016
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Yoshio Ozawa, Naruo Yabe, Masami Tsujihiro, Ryotaro Komada
  • Patent number: 9304426
    Abstract: The present disclosure relates to an electrostatic latent image developing toner containing a toner particle including a toner core containing a binder resin and a shell layer coating a surface of the toner core. The shell layer contains a unit derived from a monomer of a thermosetting resin, and a unit derived from a thermoplastic resin. The thermosetting resin is one or more resins selected from the group of amino resins consisting of a melamine resin, a urea resin, and a glyoxal resin. The toner particle contains fine particles in an interfacial portion between the toner core and the shell layer, and the fine particles have a charge property opposite to that of the toner, or have a volume resistivity lower than both a volume resistivity of the binder resin and a volume resistivity of the shell layer.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: April 5, 2016
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Yoshio Ozawa, Masami Tsujihiro, Toru Takatsuna, Ryotaro Komada
  • Patent number: 9250551
    Abstract: An electrostatic latent image developing toner is manufactured by mixing an aqueous medium dispersion liquid (X) containing negatively chargeable toner cores and an aqueous medium dispersion liquid (Y) containing positively chargeable resin particulates, followed by stirring the mixture liquid to form shell layers each on a surface of the toner cores with the resin particulates. The shell layers are formed with the resin particulates subjected to a stirring treatment together with an anionic surfactant.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: February 2, 2016
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Seishi Ojima, Ryotaro Komada
  • Patent number: 9176404
    Abstract: Regarding a method for manufacturing an electrostatic latent image developing toner, which includes a process for aggregating particulates of components such as a binder resin, a colorant, and a releasing agent, a dispersion solution of binder resin particulates obtained by a specific method is used. The dispersion solution of the binder resin particulates are prepared as an oil-in-water emulsion containing particulates including the binder resin by mixing the binder resin, which is polyester resin, in a molten state with an organic base in a liquid state so as to neutralize the binder resin and subsequently mixing a resin molten solution with water. The amount of use of the organic base is 6 parts by mass or more with respect to 100 parts by mass of the binder resin. The degree of neutralization of the binder resin neutralized by the organic base is 100% or more.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: November 3, 2015
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Ryotaro Komada
  • Publication number: 20150118615
    Abstract: A toner includes a plurality of toner particles each having a core and a shell layer on a surface of the core. In a cross section of the toner particle analyzed by EELS, for at least 50% of a circumferential length of the core, the shell layer has one or more portions each satisfying conditions that: a ratio of INc to INs is no less than 0.0 and no greater than 0.2; and a thickness of the shell layer is at least 5 nm. Here, INs indicates an intensity of an N-K shell absorption-edge originating from nitrogen atoms in the shell layer, and INc indicates an intensity of an N-K shell absorption-edge originating from nitrogen atoms in the core. In addition, the longest length among the one or more portions of the shell layer each satisfying the conditions is at least 100 nm.
    Type: Application
    Filed: October 23, 2014
    Publication date: April 30, 2015
    Applicant: KYOCERA Document Solutions Inc.
    Inventors: Masami TSUJIHIRO, Ryotaro KOMADA
  • Publication number: 20150099221
    Abstract: For at least 80% of toner particles in a toner, along at least 80% of circumferential length of a toner particle cross-section, a shell layer has a thickness of at least 5 nm and satisfies a condition that a ratio of an intensity INc relative to an intensity INs is no greater than 0.2. For at least 80% of the toner particles in the toner, along at least 80% of the circumferential length of the toner particle cross-section, the shell layer has a thickness of at least 5 nm and satisfies a condition that a ratio of an intensity ISc relative to an intensity ISs is no greater than 0.2.
    Type: Application
    Filed: October 3, 2014
    Publication date: April 9, 2015
    Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventors: Masami TSUJIHIRO, Ryotaro KOMADA
  • Publication number: 20150004537
    Abstract: The present disclosure relates to an electrostatic latent image developing toner containing a toner particle including a toner core containing a binder resin and a shell layer coating a surface of the toner core. The shell layer contains a unit derived from a monomer of a thermosetting resin, and a unit derived from a thermoplastic resin. The thermosetting resin is one or more resins selected from the group of amino resins consisting of a melamine resin, a urea resin, and a glyoxal resin. The toner particle contains fine particles in an interfacial portion between the toner core and the shell layer, and the fine particles have a charge property opposite to that of the toner, or have a volume resistivity lower than both a volume resistivity of the binder resin and a volume resistivity of the shell layer.
    Type: Application
    Filed: June 26, 2014
    Publication date: January 1, 2015
    Applicant: KYOCERA Document Solutions Inc.
    Inventors: Yoshio OZAWA, Masami TSUJIHIRO, Toru TAKATSUNA, Ryotaro KOMADA
  • Publication number: 20150004540
    Abstract: An electrostatic latent image developing toner contains toner particles each including a toner core containing a binder resin, and a shell layer coating the surface of the tore core. The shell layer contains a unit derived from a monomer of a thermosetting resin, and a unit derived from a thermoplastic resin. The resin contained in the shell layer has a unit derived from one or more monomers of thermosetting resins selected from the group of amino resins consisting of a melamine resin, a urea resin, and a glyoxal resin.
    Type: Application
    Filed: June 26, 2014
    Publication date: January 1, 2015
    Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventors: Yoshio OZAWA, Naruo YABE, Masami TSUJIHIRO, Ryotaro KOMADA
  • Publication number: 20140295345
    Abstract: An electrostatic latent image developing toner is manufactured by mixing an aqueous medium dispersion liquid (X) containing negatively chargeable toner cores and an aqueous medium dispersion liquid (Y) containing positively chargeable resin particulates, followed by stirring the mixture liquid to form shell layers each on a surface of the toner cores with the resin particulates. The shell layers are formed with the resin particulates subjected to a stirring treatment together with an anionic surfactant.
    Type: Application
    Filed: March 28, 2014
    Publication date: October 2, 2014
    Applicant: KYOCERA Document Solutions Inc.
    Inventors: Seishi OJIMA, Ryotaro KOMADA
  • Publication number: 20140170559
    Abstract: Regarding a method for manufacturing an electrostatic latent image developing toner, which includes a process for aggregating particulates of components such as a binder resin, a colorant, and a releasing agent, a dispersion solution of binder resin particulates obtained by a specific method is used. The dispersion solution of the binder resin particulates are prepared as an oil-in-water emulsion containing particulates including the binder resin by mixing the binder resin, which is polyester resin, in a molten state with an organic base in a liquid state so as to neutralize the binder resin and subsequently mixing a resin molten solution with water. The amount of use of the organic base is 6 parts by mass or more with respect to 100 parts by mass of the binder resin. The degree of neutralization of the binder resin neutralized by the organic base is 100% or more.
    Type: Application
    Filed: December 10, 2013
    Publication date: June 19, 2014
    Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventor: Ryotaro KOMADA