Patents by Inventor Ryutaro KEMBO

Ryutaro KEMBO 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: 11131940
    Abstract: A toner for developing an electrostatic charge image includes a binder resin. In dynamic viscoelasticity measurement, a storage modulus G?50T of the toner at 50° C. is 2×106 Pa or more and 3×108 Pa or less, a storage modulus G?100T of the toner at 100° C. is 1×104 Pa or more and 1×106 Pa or less, and tan ?T of the toner in an entire temperature range of 50° C. or more and 100° C. or less is 0.05 or more and 1.5 or less.
    Type: Grant
    Filed: February 5, 2020
    Date of Patent: September 28, 2021
    Assignee: FUJIFILM Business Innovation Corp.
    Inventors: Shinya Sakamoto, Shinya Nakashima, Masaki Iwase, Tomohiro Shinya, Ryutaro Kembo, Tomohito Nakajima, Naomi Miyamoto
  • Publication number: 20210253846
    Abstract: A resin particle includes a fluorescent colorant and a binder resin. The fluorescent colorant is bound to the binder resin by a chemical bond.
    Type: Application
    Filed: July 1, 2020
    Publication date: August 19, 2021
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yukiaki NAKAMURA, Masaru TAKAHASHI, Tomoaki TANAKA, Satomi HARA, Ryutaro KEMBO
  • Publication number: 20210253750
    Abstract: A resin particle includes a fluorescent colorant and a color pigment. A hue angle of the resin particle and a hue angle of the fluorescent colorant are different from each other. When a fluorescence peak wavelength in a spectral reflectance of the fluorescent colorant is represented by A (nm), an integrated value of a spectral reflectance (%) of the color pigment in a wavelength range of from A?30 (nm) to A+30 (nm) is 2,500 or more.
    Type: Application
    Filed: July 6, 2020
    Publication date: August 19, 2021
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Ryutaro KEMBO, Masaru TAKAHASHI, Yukiaki NAKAMURA, Tomoaki TANAKA, Satomi HARA
  • Publication number: 20210253845
    Abstract: A resin particle includes a binder resin; a fluorescent colorant A; and a colorant B other than the fluorescent colorant A, in which the resin particle includes a region RA in which a content of the fluorescent colorant A is larger than a content of the colorant B and a region RB in which a content of the colorant B is larger than a content of the fluorescent colorant A.
    Type: Application
    Filed: July 22, 2020
    Publication date: August 19, 2021
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yukiaki NAKAMURA, Masaru TAKAHASHI, Ryutaro KEMBO
  • Patent number: 10866532
    Abstract: An electrostatic charge image developing toner includes a polar group-containing olefin resin that is a polymer of a composition containing at least one nonpolar monomer unit (X) selected from the group consisting of ethylene and ?-olefin having 3 to 10 carbon atoms, a polar monomer unit (Y) having at least one of a maleic acid group and a maleic anhydride group, and a monomer unit (Z) having a polymerizability to at least one of the nonpolar monomer unit (X) and the polar monomer unit (Y), in which an acid value of the toner is 10 mgKOH/g to 60 mgKOH/g.
    Type: Grant
    Filed: August 5, 2019
    Date of Patent: December 15, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Tomohiro Shinya, Naomi Miyamoto, Tomohito Nakajima, Shinya Nakashima, Shinya Sakamoto, Masaki Iwase, Ryutaro Kembo
  • Patent number: 10795274
    Abstract: An electrostatic charge image developing toner includes a continuous phase containing a binder resin (i); and a discontinuous phase that has a core containing a binder resin (ii) and a coating layer covering the core and containing a binder resin (iii), and is dispersed in the continuous phase.
    Type: Grant
    Filed: August 5, 2019
    Date of Patent: October 6, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Shinya Nakashima, Shinya Sakamoto, Tomohiro Shinya, Naomi Miyamoto, Masaki Iwase, Ryutaro Kembo, Tomohito Nakajima
  • Publication number: 20200310270
    Abstract: An electrostatic charge image developing toner includes a continuous phase containing a binder resin (i); and a discontinuous phase that has a core containing a binder resin (ii) and a coating layer covering the core and containing a binder resin (iii), and is dispersed in the continuous phase.
    Type: Application
    Filed: August 5, 2019
    Publication date: October 1, 2020
    Applicant: Fuji Xerox Co., Ltd.
    Inventors: Shinya Nakashima, Shinya Sakamoto, Tomohiro Shinya, Naomi Miyamoto, Masaki Iwase, Ryutaro Kembo, Tomohito Nakajima
  • Publication number: 20200310269
    Abstract: An electrostatic charge image developing toner includes a polar group-containing olefin resin that is a polymer of a composition containing at least one nonpolar monomer unit (X) selected from the group consisting of ethylene and ?-olefin having 3 to 10 carbon atoms, a polar monomer unit (Y) having at least one of a maleic acid group and a maleic anhydride group, and a monomer unit (Z) having a polymerizability to at least one of the nonpolar monomer unit (X) and the polar monomer unit (Y), in which an acid value of the toner is 10 mgKOH/g to 60 mgKOH/g.
    Type: Application
    Filed: August 5, 2019
    Publication date: October 1, 2020
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Tomohiro SHINYA, Naomi Miyamoto, Tomohito Nakajima, Shinya Nakashima, Shinya Sakamoto, Masaki Iwase, Ryutaro Kembo
  • Publication number: 20200310271
    Abstract: A toner for developing an electrostatic charge image includes a binder resin. In dynamic viscoelasticity measurement, a storage modulus G?50T of the toner at 50° C. is 2×106 Pa or more and 3×108 Pa or less, a storage modulus G?100T of the toner at 100° C. is 1×104 Pa or more and 1×106 Pa or less, and tan ?T of the toner in an entire temperature range of 50° C. or more and 100° C. or less is 0.05 or more and 1.5 or less.
    Type: Application
    Filed: February 5, 2020
    Publication date: October 1, 2020
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Shinya SAKAMOTO, Shinya NAKASHIMA, Masaki IWASE, Tomohiro SHINYA, Ryutaro KEMBO, Tomohito NAKAJIMA, Naomi MIYAMOTO
  • Patent number: 10670983
    Abstract: A toner set includes a white toner that includes white toner particles containing white colored particles, and at least one selected from a color toner that includes color toner particles containing colored particles and a transparent toner that includes transparent toner particles, wherein an average circularity of the white toner particles is smaller than an average circularity of either the color toner particles or the transparent toner particles and a small-diameter-side number particle diameter distribution index of the white toner particles is greater than a small-diameter-side number particle diameter distribution index of either the color toner particles or the transparent toner particles.
    Type: Grant
    Filed: May 5, 2017
    Date of Patent: June 2, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Tetsuya Taguchi, Tomoaki Tanaka, Shinya Sakamoto, Ryutaro Kembo
  • Patent number: 10324389
    Abstract: An electrostatic charge developing toner includes a toner particle that includes a pigment particle having a surface aluminum proportion by an X-ray photoelectron spectroscopy of 6.0 atom % or more and 12.0 atom % or less and a binder resin having a carboxy group.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: June 18, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Shinya Sakamoto, Tsuyoshi Murakami, Tomoaki Tanaka, Masaki Iwase, Ryutaro Kembo
  • Patent number: 10254667
    Abstract: An electrostatic charge image developing toner set includes a white toner that includes white toner particles containing a core and a coating layer which does not contain a coloring agent and a colored toner that includes colored toner particles containing a core and a coating layer which does not contain a coloring agent, wherein with respect to a difference between an average equivalent circle diameter [Rw1] of the cores (Win) in the white toner particles and an average equivalent circle diameter [Rw2] of the white toner particles [Rw2?Rw1], and a difference between the average equivalent circle diameter [Rc1] of the cores (Cin) in the colored toner particles and the average equivalent circle diameter [Rc2] of the colored toner particles [Rc2?Rc1], a relationship of the following Expression (1) is satisfied: [Rw2?Rw1]<[Rc2?Rc1]??(1).
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: April 9, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Tomoaki Tanaka, Tetsuya Taguchi, Shinya Sakamoto, Ryutaro Kembo
  • Publication number: 20190094729
    Abstract: An electrostatic charge developing toner includes a toner particle that includes a pigment particle having a surface aluminum proportion by an X-ray photoelectron spectroscopy of 6.0 atom % or more and 12.0 atom % or less and a binder resin having a carboxy group.
    Type: Application
    Filed: April 16, 2018
    Publication date: March 28, 2019
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Shinya SAKAMOTO, Tsuyoshi MURAKAMI, Tomoaki TANAKA, Masaki IWASE, Ryutaro KEMBO
  • Publication number: 20180164709
    Abstract: A toner set includes a white toner that includes white toner particles containing white colored particles, and at least one selected from a color toner that includes color toner particles containing colored particles and a transparent toner that includes transparent toner particles, wherein an average circularity of the white toner particles is smaller than an average circularity of either the color toner particles or the transparent toner particles and a small-diameter-side number particle diameter distribution index of the white toner particles is greater than a small-diameter-side number particle diameter distribution index of either the color toner particles or the transparent toner particles.
    Type: Application
    Filed: May 5, 2017
    Publication date: June 14, 2018
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Tetsuya TAGUCHI, Tomoaki TANAKA, Shinya SAKAMOTO, Ryutaro KEMBO
  • Publication number: 20180129145
    Abstract: An electrostatic charge image developing toner set includes a white toner that includes white toner particles containing a core and a coating layer which does not contain a coloring agent and a colored toner that includes colored toner particles containing a core and a coating layer which does not contain a coloring agent, wherein with respect to a difference between an average equivalent circle diameter [Rw1] of the cores (Win) in the white toner particles and an average equivalent circle diameter [Rw2] of the white toner particles [Rw2?Rw1], and a difference between the average equivalent circle diameter [Rc1] of the cores (Cin) in the colored toner particles and the average equivalent circle diameter [Rc2] of the colored toner particles [Rc2?Rc1], a relationship of the following Expression (1) is satisfied: [Rw2?Rw1]<[Rc2?Rc1]??(1).
    Type: Application
    Filed: October 16, 2017
    Publication date: May 10, 2018
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Tomoaki TANAKA, Tetsuya TAGUCHI, Shinya SAKAMOTO, Ryutaro KEMBO