Patents by Inventor Masato TAIKOJI

Masato TAIKOJI 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).

  • Patent number: 10915035
    Abstract: A carrier for developing an electrostatic latent image includes a core material particle and a resin layer covering a surface of the core material particle. The resin layer includes a resin and at least one kind of a fine particle. At least one kind of the fine particles includes a chargeable fine particle. The chargeable fine particle has a long diameter of 400 to 900 nm. The chargeable fine particle has a shape factor SF-1 of 160 to 250.
    Type: Grant
    Filed: May 26, 2017
    Date of Patent: February 9, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Haruki Murata, Hiroyuki Kishida, Toyoaki Tano, Kenichi Mashiko, Masato Taikoji, Mariko Takii, Yoshihiro Murasawa
  • Publication number: 20200319571
    Abstract: An electrophotographic developer is provided. The electrophotographic developer comprises a toner and a carrier. The toner contains alumina particles. The carrier comprises a core particle and a resin layer coating a surface of the core particle. The carrier has a volume average particle diameter (Dv) of from 45 to 70 ?m and a bulk density of from 2.1 to 2.5 g/cm3.
    Type: Application
    Filed: March 31, 2020
    Publication date: October 8, 2020
    Inventors: Kento TAKEUCHI, Yutaka MAKIBE, Kenichi MASHIKO, Masato TAIKOJI, Kei NIWAYAMA
  • Publication number: 20200183297
    Abstract: A carrier for developing an electrostatic latent image includes a core material particle and a resin layer covering a surface of the core material particle. The resin layer includes a resin and at least one kind of a fine particle. At least one kind of the fine particles includes a chargeable fine particle. The chargeable fine particle has a long diameter of 400 to 900 nm. The chargeable fine particle has a shape factor SF-1 of 160 to 250.
    Type: Application
    Filed: May 26, 2017
    Publication date: June 11, 2020
    Inventors: Haruki MURATA, Hiroyuki KISHIDA, Toyoaki TANO, Kenichi MASHIKO, Masato TAIKOJI, Mariko TAKII, Yoshihiro MURASAWA
  • Patent number: 10031434
    Abstract: A carrier includes a resin layer including Al and Sn and covering the surface of the carrier. A detectable amount of Al is from 1.0% to 12.1% by atom and a ratio (Al/Sn) of the detectable amount of Al to that of Sn is from 2.0 to 50.0 when the carrier is subjected to an X-ray photoelectron spectroscopic (XPS) analysis.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: July 24, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Mariko Takii, Yoshihiro Murasawa, Takahiro Nakamura, Kei Niwayama, Haruki Murata, Masato Taikoji, Koichi Sakata
  • Patent number: 9989874
    Abstract: A carrier for developing electrostatic latent images is provided. The carrier includes a magnetic core particle and a resin layer coating a surface of the magnetic core particle. The resin layer includes a particulate material A having a volume average particle diameter (a) and a particulate material B having a volume average particle diameter (b). The volume average particle diameter (a) of the particulate material A is the largest among volume average particle diameters of all particulate materials included in the resin layer, and an inequation 100?(a)/(b)?5 is satisfied. The particulate material A is barium sulfate.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: June 5, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshihiro Murasawa, Toyoaki Tano, Hiroyuki Kishida, Masato Taikoji, Kenichi Mashiko, Mariko Takii, Haruki Murata
  • Publication number: 20170269497
    Abstract: A carrier for developing electrostatic latent images is provided. The carrier includes a magnetic core particle and a resin layer coating a surface of the magnetic core particle. The resin layer includes a particulate material A having a volume average particle diameter (a) and a particulate material B having a volume average particle diameter (b). The volume average particle diameter (a) of the particulate material A is the largest among volume average particle diameters of all particulate materials included in the resin layer, and an inequation 100?(a)/(b)?5 is satisfied. The particulate material A is barium sulfate.
    Type: Application
    Filed: March 3, 2017
    Publication date: September 21, 2017
    Inventors: Yoshihiro MURASAWA, Toyoaki TANO, Hiroyuki KISHIDA, Masato TAIKOJI, Kenichi MASHIKO, Mariko TAKII, Haruki MURATA
  • Publication number: 20160363880
    Abstract: A carrier includes a resin layer including Al and Sn and covering the surface of the carrier. A detectable amount of Al is from 1.0% to 12.1% by atom and a ratio (Al/Sn) of the detectable amount of Al to that of Sn is from 2.0 to 50.0 when the carrier is subjected to an X-ray photoelectron spectroscopic (XPS) analysis.
    Type: Application
    Filed: May 20, 2016
    Publication date: December 15, 2016
    Inventors: Mariko TAKII, Yoshihiro MURASAWA, Takahiro NAKAMURA, Kei NIWAYAMA, Haruki MURATA, Masato TAIKOJI, Koichi SAKATA
  • Patent number: 8722305
    Abstract: A method of preparing a carrier for electrophotography, including a core material and a coating material layer formed on the surface of the core material, including: coating the core material with the coating material; and burning the coating material with a high-frequency induction heater, wherein the core material has a saturated magnetization of from 40 to 95 Am2/kg.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: May 13, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Masato Taikoji, Kousuke Suzuki, Shinichiro Yagi, Yuuki Mizutani
  • Patent number: 8697326
    Abstract: A method of manufacturing a carrier including covering a core material with a covering material to form a covering layer on the core material and baking the covering material by heating the core material by high frequency induction applied thereto by a high frequency induction heating device.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: April 15, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Kousuke Suzuki, Shinichiro Yagi, Masato Taikoji, Masanori Rimoto
  • Patent number: 8647804
    Abstract: A method of preparing carrier for electrophotography, which includes a core material and a coating material layer formed on the surface of the core material, including coating a coating material of the coating material layer on the core material; and burning the coating material by an induction heater, wherein the induction heater applies an alternative current to parallely-located plural coil circuits including a conductive wire including the shape of a coil to generate a magnetic line changing its direction and intensity for inductively heating the core material to heat the coating material.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: February 11, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuuki Mizutani, Shinichiro Yagi, Kousuke Suzuki, Masato Taikoji
  • Publication number: 20120315572
    Abstract: A method of preparing carrier for electrophotography, which includes a core material and a coating material layer formed on the surface of the core material, including coating a coating material of the coating material layer on the core material; and burning the coating material by an induction heater, wherein the induction heater applies an alternative current to parallely-located plural coil circuits including a conductive wire including the shape of a coil to generate a magnetic line changing its direction and intensity for inductively heating the core material to heat the coating material.
    Type: Application
    Filed: May 30, 2012
    Publication date: December 13, 2012
    Inventors: Yuuki MIZUTANI, Shinichiro Yagi, Kousuke Suzuki, Masato Taikoji
  • Publication number: 20120264042
    Abstract: A method of preparing a carrier for electrophotography, including a core material and a coating material layer formed on the surface of the core material, including: coating the core material with the coating material; and burning the coating material with a high-frequency induction heater, wherein the core material has a saturated magnetization of from 40 to 95 Am2/kg.
    Type: Application
    Filed: March 21, 2012
    Publication date: October 18, 2012
    Inventors: Masato Taikoji, Kousuke Suzuki, Shinichiro Yagi, Yuuki Mizutani
  • Publication number: 20120008979
    Abstract: A method of manufacturing a carrier including covering a core material with a covering material to form a covering layer on the core material and baking the covering material by heating the core material by high frequency induction applied thereto by a high frequency induction heating device.
    Type: Application
    Filed: June 27, 2011
    Publication date: January 12, 2012
    Applicant: RICOH COMPANY, LTD.
    Inventors: Kousuke SUZUKI, Shinichiro YAGI, Masato TAIKOJI, Masanori RIMOTO