Patents by Inventor Hironori Toshimitu

Hironori Toshimitu 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).

  • Method for producing toner for developing electrostatic images
    Patent number: 10409182
    Abstract: A method for efficiently producing a toner for developing electrostatic images, which contains very few coarse particles and having excellent printing characteristics. The method can comprise a sieving step of removing coarse particles from colored resin particles by, using an air flow, supplying the colored resin particles to a sieve, wherein a metal mesh laminate comprising at least two metal meshes attached to each other by sintering, the metal meshes being different in opening size, is used as the sieve; wherein the metal meshes of the metal mesh laminate are laminated in order of opening size and, of the metal meshes constituting the metal mesh laminate, one having a smallest opening size is disposed on a side of supplying the colored resin particles; and wherein the opening size of the metal mesh having the smallest opening size is in a range of from 32 to 110 ?m.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: September 10, 2019
    Assignee: ZEON CORPORATION
    Inventors: Fuminari Oyama, Nobuhiko Okamoto, Hironori Toshimitu, Satoshi Izumi, Bunta Yasuda, Koichi Emura
  • Method for producing toner for developing electrostatic images
    Patent number: 10365570
    Abstract: A method for efficiently producing a toner for developing electrostatic images, which contains very few coarse particles and having excellent printing characteristics. The method can comprise a sieving step of removing coarse particles from colored resin particles by, using an air flow, supplying the colored resin particles to a sieve, wherein a metal mesh laminate comprising at least two metal meshes attached to each other by sintering, the metal meshes being different in opening size, is used as the sieve; wherein the metal meshes of the metal mesh laminate are laminated in order of opening size and, of the metal meshes constituting the metal mesh laminate, one having a smallest opening size is disposed on a side of supplying the colored resin particles; and wherein the opening size of the metal mesh having the smallest opening size is in a range of from 32 to 110 ?m.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: July 30, 2019
    Assignee: ZEON CORPORATION
    Inventors: Fuminari Oyama, Nobuhiko Okamoto, Hironori Toshimitu, Satoshi Izumi, Bunta Yasuda, Koichi Emura
  • METHOD FOR PRODUCING TONER FOR DEVELOPING ELECTROSTATIC IMAGES
    Publication number: 20170248857
    Abstract: A method for efficiently producing a toner for developing electrostatic images, which contains very few coarse particles and having excellent printing characteristics. The method can comprise a sieving step of removing coarse particles from colored resin particles by, using an air flow, suppling the colored resin particles to a sieve, wherein a metal mesh laminate comprising at least two metal meshes attached to each other by sintering, the metal meshes being different in opening size, is used as the sieve; wherein the metal meshes of the metal mesh laminate are laminated in order of opening size and, of the metal meshes constituting the metal mesh laminate, one having a smallest opening size is disposed on a side of supplying the colored resin particles; and wherein the opening size of the metal mesh having the smallest opening size is in a range of from 32 to 110 ?m.
    Type: Application
    Filed: February 16, 2017
    Publication date: August 31, 2017
    Applicant: ZEON CORPORATION
    Inventors: Fuminari Oyama, Nobuhiko Okamoto, Hironori Toshimitu, Satoshi Izumi, Bunta Yasuda, Koichi Emura