Patents by Inventor Ken MAETANI

Ken MAETANI 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: 11243482
    Abstract: A toner includes toner particles. The toner particles each include a toner mother particle. The toner mother particles contain a binder resin and a magnetic powder. The binder resin includes a polyester resin, a vinyl resin, and a block polymer. The block polymer includes a polyester portion, a vinyl polymer portion, and a linker that links the polyester portion and the vinyl polymer portion. The linker is derived from a specific compound having a vinyl group and at least one of a carboxy group and an alcoholic hydroxyl group. The magnetic powder has an octahedral structure.
    Type: Grant
    Filed: June 19, 2020
    Date of Patent: February 8, 2022
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Masami Tsujihiro, Ken Maetani
  • Publication number: 20200401059
    Abstract: A toner includes toner particles. The toner particles each include a toner mother particle. The toner mother particles contain a binder resin and a magnetic powder. The binder resin includes a polyester resin, a vinyl resin, and a block polymer. The block polymer includes a polyester portion, a vinyl polymer portion, and a linker that links the polyester portion and the vinyl polymer portion. The linker is derived from a specific compound having a vinyl group and at least one of a carboxy group and an alcoholic hydroxyl group. The magnetic powder has an octahedral structure.
    Type: Application
    Filed: June 19, 2020
    Publication date: December 24, 2020
    Applicant: KYOCERA Document Solutions Inc.
    Inventors: Masami TSUJIHIRO, Ken MAETANI
  • Patent number: 10564559
    Abstract: A positively chargeable toner includes toner particles. The toner particles each include a core, a shell layer covering a surface of the core, and fluororesin particles. The fluororesin particles are positioned within the core, or between the core and the shell layer. The shell layer contains a positively chargeable material.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: February 18, 2020
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Ken Maetani
  • Publication number: 20190332026
    Abstract: A positively chargeable toner includes toner particles. The toner particles each include a core, a shell layer covering a surface of the core, and fluororesin particles. The fluororesin particles are positioned within the core, or between the core and the shell layer. The shell layer contains a positively chargeable material.
    Type: Application
    Filed: April 17, 2019
    Publication date: October 31, 2019
    Applicant: KYOCERA Document Solutions Inc.
    Inventor: Ken MAETANI
  • Patent number: 9547247
    Abstract: A toner includes a plurality of toner particles that each include a core and a shell layer disposed over a surface of the core. The shell layer contains a unit derived from a thermoplastic resin and a unit derived from a monomer or prepolymer of a thermosetting resin. A surface of each of the toner particles has a Young's modulus that changes by a proportion of no greater than 20% from 30° C. to 50° C., and changes by a proportion from 50° C. to 70° C. that when divided by the proportion of change from 30° C. to 50° C., yields a value of at least 3.0 and no greater than 10.0. The Young's modulus is measured in a state in which an external additive is not adhered to the toner particle using a scanning probe microscope while raising a cantilever temperature thereof.
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: January 17, 2017
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Yoshio Ozawa, Noriaki Sakamoto, Ken Maetani
  • Patent number: 9482976
    Abstract: An electrostatic latent image developing toner includes toner particles each including a toner core containing a binder resin and a shell layer on a surface of the toner core. The shell layer includes a unit derived from a monomer of a thermosetting resin. The thermosetting resin is one or more resins selected from the group of amino resins consisting of a melamine resin, a urea resin, and a glyoxal resin. The inorganic particles intervene in an interface between the toner core and the shell layer. The inorganic particles have a number average particle diameter of 60 nm or more and 250 nm or less. Protrusions having a shape that follows a shape of the inorganic particles are on surfaces of the toner particles.
    Type: Grant
    Filed: October 28, 2014
    Date of Patent: November 1, 2016
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Ken Maetani
  • Patent number: 9298116
    Abstract: An electrostatic charge image developing toner includes a plurality of toner particles each having a toner core, organic particles adhering to a surface of the toner core, and a shell layer covering the toner core and the organic particles. The shell layers contain a thermosetting resin.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: March 29, 2016
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Ken Maetani, Tomoyuki Ogawa
  • Publication number: 20150205220
    Abstract: A toner includes a plurality of toner particles that each include a core and a shell layer disposed over a surface of the core. The shell layer contains a unit derived from a thermoplastic resin and a unit derived from a monomer or prepolymer of a thermosetting resin. A surface of each of the toner particles has a Young's modulus that changes by a proportion of no greater than 20% from 30° C. to 50° C., and changes by a proportion from 50° C. to 70° C. that when divided by the proportion of change from 30° C. to 50° C., yields a value of at least 3.0 and no greater than 10.0. The Young's modulus is measured in a state in which an external additive is not adhered to the toner particle using a scanning probe microscope while raising a cantilever temperature thereof.
    Type: Application
    Filed: January 15, 2015
    Publication date: July 23, 2015
    Applicant: KYOCERA Document Solutions Inc.
    Inventors: Yoshio OZAWA, Noriaki SAKAMOTO, Ken MAETANI
  • Publication number: 20150153662
    Abstract: An electrostatic charge image developing toner includes a plurality of toner particles each having a toner core, organic particles adhering to a surface of the toner core, and a shell layer covering the toner core and the organic particles. The shell layers contain a thermosetting resin.
    Type: Application
    Filed: November 21, 2014
    Publication date: June 4, 2015
    Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventors: Ken MAETANI, Tomoyuki OGAWA
  • Publication number: 20150118612
    Abstract: An electrostatic latent image developing toner includes toner particles each including a toner core containing a binder resin and a shell layer on a surface of the toner core. The shell layer includes a unit derived from a monomer of a thermosetting resin. The thermosetting resin is one or more resins selected from the group of amino resins consisting of a melamine resin, a urea resin, and a glyoxal resin. The inorganic particles intervene in an interface between the toner core and the shell layer. The inorganic particles have a number average particle diameter of 60 nm or more and 250 nm or less. Protrusions having a shape that follows a shape of the inorganic particles are on surfaces of the toner particles.
    Type: Application
    Filed: October 28, 2014
    Publication date: April 30, 2015
    Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventor: Ken MAETANI