Patents by Inventor Sakiko TAKEUCHI

Sakiko TAKEUCHI 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: 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: 10691035
    Abstract: A brilliant toner includes a first toner which contains a first toner particle containing a flake-shape brilliant pigment; and a second toner which contains a second toner particle containing a flake-shape brilliant pigment, and has a different color from that of the first toner, and an electrostatic charge image developing toner includes a first toner which contains a first toner particle; and a second toner which has a different color from that of the first toner, and contains the second toner particle, in which, based on a charge distribution of each of the first toner and the second toner obtained according to a charge spectrograph method, maximum peak positions of the first toner and the second toner are taken as P1 and P2, respectively, and full widths at half maximum of the first toner and the second toner are taken as W1 and W2, respectively, |P1?P2| is 3 mm or less, and |W1?W2| is 3 mm or less.
    Type: Grant
    Filed: June 7, 2019
    Date of Patent: June 23, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Satomi Hara, Masaru Takahashi, Yukiaki Nakamura, Sakiko Takeuchi
  • Patent number: 10649356
    Abstract: A brilliant toner includes a first toner which contains a first toner particle containing a flake-shape brilliant pigment; and a second toner which contains a second toner particle containing a flake-shape brilliant pigment, and has a different color from that of the first toner, and an electrostatic charge image developing toner includes a first toner which contains a first toner particle; and a second toner which has a different color from that of the first toner, and contains the second toner particle, in which, based on a charge distribution of each of the first toner and the second toner obtained according to a charge spectrograph method, maximum peak positions of the first toner and the second toner are taken as P1 and P2, respectively, and full widths at half maximum of the first toner and the second toner are taken as W1 and W2, respectively, |P1?P2| is 3 mm or less, and |W1?W2| is 3 mm or less.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: May 12, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Satomi Hara, Masaru Takahashi, Yukiaki Nakamura, Sakiko Takeuchi
  • Publication number: 20190285998
    Abstract: A brilliant toner includes a first toner which contains a first toner particle containing a flake-shape brilliant pigment; and a second toner which contains a second toner particle containing a flake-shape brilliant pigment, and has a different color from that of the first toner, and an electrostatic charge image developing toner includes a first toner which contains a first toner particle; and a second toner which has a different color from that of the first toner, and contains the second toner particle, in which, based on a charge distribution of each of the first toner and the second toner obtained according to a charge spectrograph method, maximum peak positions of the first toner and the second toner are taken as P1 and P2, respectively, and full widths at half maximum of the first toner and the second toner are taken as W1 and W2, respectively, |P1?P2| is 3 mm or less, and |W1?W2| is 3 mm or less.
    Type: Application
    Filed: June 7, 2019
    Publication date: September 19, 2019
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Satomi HARA, Masaru TAKAHASHI, Yukiaki NAKAMURA, Sakiko TAKEUCHI
  • Publication number: 20190243269
    Abstract: A brilliant toner includes a first toner which contains a first toner particle containing a flake-shape brilliant pigment; and a second toner which contains a second toner particle containing a flake-shape brilliant pigment, and has a different color from that of the first toner, and an electrostatic charge image developing toner includes a first toner which contains a first toner particle; and a second toner which has a different color from that of the first toner, and contains the second toner particle, in which, based on a charge distribution of each of the first toner and the second toner obtained according to a charge spectrograph method, maximum peak positions of the first toner and the second toner are taken as P1 and P2, respectively, and full widths at half maximum of the first toner and the second toner are taken as W1 and W2, respectively, |P1-P2| is 3 mm or less, and |W1-W2| is 3 mm or less.
    Type: Application
    Filed: August 21, 2018
    Publication date: August 8, 2019
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Satomi HARA, Masaru TAKAHASHI, Yukiaki NAKAMURA, Sakiko TAKEUCHI