Patents by Inventor Kazutsuna SASAKI

Kazutsuna SASAKI 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: 11181847
    Abstract: A carrier for electrostatic image development includes: a core material; and a coating resin layer that contains inorganic particles and covers the core material. The content of the inorganic particles is 10% by mass or more and 60% by mass or less based on the total mass of the coating resin layer. The volume average diameter D (?m) of the inorganic particles and the thickness T (?m) of the coating resin layer satisfy the following relational expression (1): 0.007?D/T?0.24.
    Type: Grant
    Filed: April 6, 2020
    Date of Patent: November 23, 2021
    Assignee: FUJIFILM Business Innovation Corp.
    Inventors: Shintaro Anno, Takuro Watanabe, Yasuaki Hashimoto, Yasuo Kadokura, Kazutsuna Sasaki, Jumpei Iwasaki
  • Publication number: 20210278773
    Abstract: An electrostatic charge image developing carrier includes: magnetic particles; and a resin layer coating the magnetic particles and containing inorganic particles, in which an average particle diameter of the inorganic particles is 5 nm or more and 90 nm or less, an average thickness of the resin layer is 0.6 ?m or more and 1.4 ?m or less, and a ratio B/A of a surface area B of the electrostatic charge image developing carrier to a plan view area A of the electrostatic charge image developing carrier is 1.020 or more and 1.100 or less when a surface of the electrostatic charge image developing carrier is three-dimensionally analyzed.
    Type: Application
    Filed: July 31, 2020
    Publication date: September 9, 2021
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Jumpei IWASAKI, Yasuo Kadokura, Shintaro Anno, Kazutsuna Sasaki, Satoshi Miura
  • Publication number: 20210271180
    Abstract: An electrostatic charge image developing carrier includes: magnetic particles; and a resin layer coating the magnetic particles and containing inorganic particles, in which an exposed area ratio of the magnetic particles is 0.1% or more and 4.0% or less, an average particle diameter of the inorganic particles is 5 nm or more and 90 nm or less, and a ratio B/A of a surface area B of the electrostatic charge image developing carrier to a plan view area A of the electrostatic charge image developing carrier is 1.020 or more and 1.100 or less when a surface of the electrostatic charge image developing carrier is three-dimensionally analyzed.
    Type: Application
    Filed: July 31, 2020
    Publication date: September 2, 2021
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Kazutsuna SASAKI, Yasuo KADOKURA, Shintaro ANNO, Satoshi MIURA, Jumpei IWASAKI
  • Patent number: 11036155
    Abstract: A toner for electrostatic image development contains: toner base particles containing at least a nonionic surfactant, a binder resin, and a release agent; and an external additive. The content of the nonionic surfactant is from 0.05% by mass to 1% by mass inclusive based on the total mass of the toner, and the external additive contains tin oxide particles.
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: June 15, 2021
    Assignee: FUJIFILM Business Innovation Corp.
    Inventors: Kazutsuna Sasaki, Yutaka Saito, Kazuhiko Nakamura, Yuka Yamagishi
  • Publication number: 20210088924
    Abstract: A carrier for electrostatic image development includes: a core material; and a coating resin layer that contains inorganic particles and covers the core material. The content of the inorganic particles is 10% by mass or more and 60% by mass or less based on the total mass of the coating resin layer. The volume average diameter D (?m) of the inorganic particles and the thickness T (?m) of the coating resin layer satisfy the following relational expression (1): 0.007?D/T?0.24.
    Type: Application
    Filed: April 6, 2020
    Publication date: March 25, 2021
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Shintaro ANNO, Takuro WATANABE, Yasuaki HASHIMOTO, Yasuo KADOKURA, Kazutsuna SASAKI, Jumpei IWASAKI
  • Publication number: 20200301299
    Abstract: A toner for electrostatic image development contains: toner base particles containing at least a nonionic surfactant, a binder resin, and a release agent; and an external additive. The content of the nonionic surfactant is from 0.05% by mass to 1% by mass inclusive based on the total mass of the toner, and the external additive contains tin oxide particles.
    Type: Application
    Filed: July 25, 2019
    Publication date: September 24, 2020
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Kazutsuna SASAKI, Yutaka SAITO, Kazuhiko NAKAMURA, Yuka YAMAGISHI
  • Patent number: 10725393
    Abstract: A toner for electrostatic image development includes: toner base particles containing at least a nonionic surfactant, a binder resin, and a release agent; and an external additive. The content of the nonionic surfactant is from 0.05% by mass to 1% by mass inclusive based on the total mass of the toner. The external additive contains inorganic particles having an arithmetic mean particle diameter of from 50 nm to 400 nm inclusive and an average circularity of from 0.5 to 0.8 inclusive.
    Type: Grant
    Filed: July 19, 2019
    Date of Patent: July 28, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yuka Yamagishi, Yutaka Saito, Kazuhiko Nakamura, Kazutsuna Sasaki, Takashi Inukai, Sakiko Takeuchi
  • Patent number: 10571820
    Abstract: A white toner for electrostatic latent image development includes toner particles containing a binder resin, a white pigment, and a release agent, the binder resin containing an amorphous resin. In viscosity measurement using a capillary viscometer, a temperature-viscosity curve has a minimum value within a temperature range of 70° C. or more and 95° C. or less.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: February 25, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Daisuke Noguchi, Yoshimasa Fujihara, Kazutsuna Sasaki
  • Publication number: 20190196351
    Abstract: A white toner for electrostatic latent image development includes toner particles containing a binder resin, a white pigment, and a release agent, the binder resin containing an amorphous resin. In viscosity measurement using a capillary viscometer, a temperature-viscosity curve has a minimum value within a temperature range of 70° C. or more and 95° C. or less.
    Type: Application
    Filed: August 23, 2018
    Publication date: June 27, 2019
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Daisuke NOGUCHI, Yoshimasa FUJIHARA, Kazutsuna SASAKI