Patents by Inventor Hiroyuki Kozuru

Hiroyuki Kozuru 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: 10353311
    Abstract: A white toner for electrostatic charge image development contains a toner particle that includes a toner base particle containing a binder resin, a white colorant, and a releasing agent, and an external additive, wherein the toner particle contains, as the external additive, a fatty acid metal salt particle having a volume-based median diameter in a range of 0.5 to 1.5 ?m, and an average circularity of the toner particles is in a range of 0.870 to 0.950.
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: July 16, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Michiaki Ishikawa, Hiroyuki Kozuru
  • Publication number: 20180314175
    Abstract: A white toner for electrostatic charge image development contains a toner particle that includes a toner base particle containing a binder resin, a white colorant, and a releasing agent, and an external additive, wherein the toner particle contains, as the external additive, a fatty acid metal salt particle having a volume-based median diameter in a range of 0.5 to 1.5 ?m, and an average circularity of the toner particles is in a range of 0.870 to 0.950.
    Type: Application
    Filed: April 9, 2018
    Publication date: November 1, 2018
    Inventors: Michiaki Ishikawa, Hiroyuki Kozuru
  • Patent number: 9354536
    Abstract: A two-component developing agent for developing an electrostatic latent image includes toner particles composed of toner base particles and an exterior additive attached on the toner base particles, and carrier particles composed of carrier core particles and a coating resin provided on the carrier core particles. The coating resin includes a sulfur atom and a resin obtained by polymerizing an isobutyl methacrylate monomer, and the toner base particles include a sulfur atom.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: May 31, 2016
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kosuke Nakamura, Yoshiyasu Matsumoto, Satoshi Uchino, Hidehito Haruki, Hiroyuki Kozuru
  • Patent number: 9309465
    Abstract: A coal reforming method includes: drying; performing carbonizing; and cooling. (1) In the drying, coal is classified into coarse coal and fine coal while being dried, and heat obtained by burning at least a portion of the fine coal and at least a portion of the carbonizing gas is used as a heat source during the drying or the carbonizing. (2) In the cooling, the char is classified while being cooled to separate fine char from the char, and heat obtained by burning at least a portion of the fine char and at least a portion of the carbonizing gas is used as a heat source during the drying or the carbonizing. At least any one of (1) and (2) is performed.
    Type: Grant
    Filed: July 19, 2013
    Date of Patent: April 12, 2016
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Hiroyuki Kozuru, Akira Kanei, Katsuyuki Tomita, Katsushi Kosuge, Atsushi Kobayashi
  • Publication number: 20150309433
    Abstract: An electrostatic charge image developing toner includes: toner matrix particles containing a binder resin; and an external additive added to the toner matrix particles, wherein the external additive includes joined particles each including a secondary particle including a plurality of spherical primary particles joined together, the joined particles include at least particles with a secondary particle size d2 in the range of 70 nm to 400 nm, and particles with a ratio d2/d1 in the range of 1.6 to 4.2 make up at least 50% by number of the particles with a secondary particle size d2 in the range of 70 nm to 400 nm, wherein d1 is the diameter of primary particles in the joined particle, and d2 is the secondary particle size.
    Type: Application
    Filed: April 9, 2015
    Publication date: October 29, 2015
    Inventors: Ikuko SAKURADA, Satoshi Uchino, Yasuko Uchino, Shinya Obara, Futoshi Kadonome, Hiroyuki Kozuru
  • Publication number: 20150175891
    Abstract: A coal reforming method includes: drying; performing carbonizing; and cooling. (1) In the drying, coal is classified into coarse coal and fine coal while being dried, and heat obtained by burning at least a portion of the fine coal and at least a portion of the carbonizing gas is used as a heat source during the drying or the carbonizing. (2) In the cooling, the char is classified while being cooled to separate fine char from the char, and heat obtained by burning at least a portion of the fine char and at least a portion of the carbonizing gas is used as a heat source during the drying or the carbonizing. At least any one of (1) and (2) is performed.
    Type: Application
    Filed: July 19, 2013
    Publication date: June 25, 2015
    Inventors: Hiroyuki Kozuru, Akira Kanei, Katsuyuki Tomita, Katsushi Kosuge, Atsushi Kobayashi
  • Patent number: 9063442
    Abstract: A developing device includes a developer container, a developing unit, a developer outlet and a replenishment developer inlet. The developer container contains a developer composed of a toner and a first carrier. The developing unit develops an electrostatic latent image on an image carrier using the developer. The developer outlet discharges the developer. The replenishment developer inlet supplies a replenishment developer to the developer container. The replenishment developer includes a second carrier. A ratio of a poured bulk density of the second carrier to a poured bulk density of the first carrier ranges from 0.60 to 0.95.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: June 23, 2015
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kosuke Nakamura, Hiroyuki Kozuru, Yoshiyasu Matsumoto
  • Patent number: 8995887
    Abstract: A developing device includes a developer container, a developing unit, a developer outlet and a replenishment developer inlet. The developer container contains a developer composed of a toner and a first carrier. The developing unit develops an electrostatic latent image on an image carrier using the developer. The developer outlet discharges the developer. The replenishment developer inlet supplies a replenishment developer to the developer container. The replenishment developer includes a second carrier. A ratio of a poured bulk density of the second carrier to a poured bulk density of the first carrier ranges from 1.05 to 1.65.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: March 31, 2015
    Assignee: Konica Minolta, Inc.
    Inventors: Kosuke Nakamura, Hiroyuki Kozuru, Yoshiyasu Matsumoto
  • Publication number: 20150010862
    Abstract: According to one implementation, a two-component developer for developing an electrostatic latent image includes a toner particle and a carrier particle. The toner particle includes an external additive on a surface of a toner mother particle including at least a binding resin. The carrier particle includes a resin covering layer on a surface of a carrier core material particle. The resin covering layer includes a covering resin obtained by polymerizing at least an isobutyl methacrylate monomer and includes a nitrogen atom as an atom composing the covering resin.
    Type: Application
    Filed: July 3, 2014
    Publication date: January 8, 2015
    Inventors: Yoshiyasu MATSUMOTO, Kosuke NAKAMURA, Satoshi UCHINO, Hidehito HARUKI, Hiroyuki KOZURU
  • Publication number: 20140363762
    Abstract: A two-component developing agent for developing an electrostatic latent image includes toner particles composed of toner base particles and an exterior additive attached on the toner base particles, and carrier particles composed of carrier core particles and a coating resin provided on the carrier core particles. The coating resin includes a sulfur atom and a resin obtained by polymerizing an isobutyl methacrylate monomer, and the toner base particles include a sulfur atom.
    Type: Application
    Filed: May 28, 2014
    Publication date: December 11, 2014
    Applicant: Konica Minolta, Inc.
    Inventors: Kosuke NAKAMURA, Yoshiyasu MATSUMOTO, Satoshi UCHINO, Hidehito HARUKI, Hiroyuki KOZURU
  • Publication number: 20140205327
    Abstract: A developing device includes a developer container, a developing unit, a developer outlet and a replenishment developer inlet. The developer container contains a developer composed of a toner and a first carrier. The developing unit develops an electrostatic latent image on an image carrier using the developer. The developer outlet discharges the developer. The replenishment developer inlet supplies a replenishment developer to the developer container. The replenishment developer includes a second carrier. A ratio of a poured bulk density of the second carrier to a poured bulk density of the first carrier ranges from 0.60 to 0.95.
    Type: Application
    Filed: January 15, 2014
    Publication date: July 24, 2014
    Applicant: Konica Minolta, Inc.
    Inventors: Kosuke NAKAMURA, Hiroyuki Kozuru, Yoshiyasu Matsumoto
  • Publication number: 20140205326
    Abstract: A developing device includes a developer container, a developing unit, a developer outlet and a replenishment developer inlet. The developer container contains a developer composed of a toner and a first carrier. The developing unit develops an electrostatic latent image on an image carrier using the developer. The developer outlet discharges the developer. The replenishment developer inlet supplies a replenishment developer to the developer container. The replenishment developer includes a second carrier. A ratio of a poured bulk density of the second carrier to a poured bulk density of the first carrier ranges from 1.05 to 1.65.
    Type: Application
    Filed: January 15, 2014
    Publication date: July 24, 2014
    Applicant: Konica Minolta, Inc.
    Inventors: Kosuke NAKAMURA, Hiroyuki KOZURU, Yoshiyasu MATSUMOTO
  • Patent number: 8507169
    Abstract: A two-component developer is disclosed, composing a toner comprising parent toner particles with an attached external additive and a carrier provided with a resin covering layer on a surface of a core particle, wherein the resin covering layer comprises a binder resin comprising an acrylic resin and when the resin covering layer is divided in half to a core particle side and a surface side, a nitrogen element content of the core particle side is larger than a nitrogen element content of the surface side.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: August 13, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Tomoko Mine, Mikihiko Sukeno, Tatsuya Nagase, Tomomi Oshiba, Hiroyuki Kozuru, Saburou Hiraoka, Yoshiyasu Matsumoto, Kosuke Nakamura, Hitomi Motani, Takanari Kayamori
  • Patent number: 8435715
    Abstract: Disclosed is a production method of a two-component developer for developing an electrostatic image comprising a toner and a resin coated carrier having a porous magnetic core particle and a resin coated layer, wherein the porous magnetic core particle are composed of a porous ferrite material and have pore apertures on a surface of the particle, and the method comprises steps of blocking the pore apertures of the porous magnetic core particle with rubber particles by dry mixing of the porous magnetic core particle and the rubber particles, forming the resin coated carrier by forming a resin layer on the porous magnetic core particle whose pore apertures have been blocked, and mixing the resin coated carrier and the toner.
    Type: Grant
    Filed: July 18, 2011
    Date of Patent: May 7, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Kosuke Nakamura, Hiroyuki Kozuru, Yoshiyasu Matsumoto, Takanari Kayamori, Junya Ueda
  • Patent number: 8431320
    Abstract: Disclosed is a manufacturing method of toner which includes at least polyester resin and colorant, comprising the steps of: (A) dissolving, into an organic solvent, the polyester resin and ultrahigh molecular weight styrene resin in which a peak is present in a range larger than 500 thousands and smaller than 3 million in a molecular weight distribution, and preparing a binder resin solution; (B) dispersing the binder resin solution as binder resin solution droplets into an aqueous medium; (C) removing the organic solvent from the binder resin solution droplets, and preparing a resin particle dispersion; and (D) aggregating resin particles from which the organic solvent is removed and colorant particles containing the colorant with each other, and forming toner particles.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: April 30, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Masaharu Matsubara, Hiroyuki Kozuru, Noboru Ueda
  • Publication number: 20120225379
    Abstract: A two-component developer is disclosed, composing a toner comprising parent toner particles with an attached external additive and a carrier provided with a resin covering layer on a surface of a core particle, wherein the resin covering layer comprises a binder resin comprising an acrylic resin and when the resin covering layer is divided in half to a core particle side and a surface side, a nitrogen element content of the core particle side is larger than a nitrogen element content of the surface side.
    Type: Application
    Filed: February 28, 2012
    Publication date: September 6, 2012
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Tomoko MINE, Mikihiko SUKENO, Tatsuya NAGASE, Tomomi OSHIBA, Hiroyuki KOZURU, Saburou HIRAOKA, Yoshiyasu MATSUMOTO, Kosuke NAKAMURA, Hitomi MOTANI, Takanari KAYAMORI
  • Publication number: 20120028186
    Abstract: Disclosed is a production method of a two-component developer for developing an electrostatic image comprising a toner and a resin coated carrier having a porous magnetic core particle and a resin coated layer, wherein the porous magnetic core particle are composed of a porous ferrite material and have pit apertures on a surface of the particle, and the method comprises steps of blocking the pit apertures of the porous magnetic core particle with rubber particles by dry mixing of the porous magnetic core particle and the rubber particles, forming the resin coated carrier by forming a resin layer on the porous magnetic core particle whose pore openings have been blocked, and mixing the resin coated carrier and the toner.
    Type: Application
    Filed: July 18, 2011
    Publication date: February 2, 2012
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Kosuke NAKAMURA, Hiroyuki KOZURU, Yoshiyasu MATSUMOTO, Takanari KAYAMORI, Junya UEDA
  • Publication number: 20120021352
    Abstract: Disclosed is a manufacturing method of toner which includes at least polyester resin and colorant, comprising the steps of: (A) dissolving, into an organic solvent, the polyester resin and ultrahigh molecular weight styrene resin in which a peak is present in a range larger than 500 thousands and smaller than 3 million in a molecular weight distribution, and preparing a binder resin solution; (B) dispersing the binder resin solution as binder resin solution droplets into an aqueous medium; (C) removing the organic solvent from the binder resin solution droplets, and preparing a resin particle dispersion; and (D) aggregating resin particles from which the organic solvent is removed and colorant particles containing the colorant with each other, and forming toner particles.
    Type: Application
    Filed: July 20, 2011
    Publication date: January 26, 2012
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Masaharu MATSUBARA, Hiroyuki KOZURU, Noboru UEDA
  • Patent number: 8080354
    Abstract: Disclosed is toner in which is used in an image formation process comprising the steps of transferring an image of toner formed on a photoreceptor onto a recording sheet, and removing any residual toner remaining on any of the photoreceptor, an intermediate transfer member and a secondary transfer member with a cleaning blade, the toner containing at least toner particles (A) and small particles (B), wherein the toner particles (A) have an average circularity of from 0.93 to 0.99 and a number-based median diameter (D50) of from 3.0 to 8.0 ?m, the small particles (B) have an average circularity of from 0.70 to 0.92 and a number-based median diameter (D50) of from 0.15 to 0.60 times that of the toner particles (A), and the surface energy of the toner particles (A) is different from that of the small particles (B).
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: December 20, 2011
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Hiroyuki Kozuru, Yoshiyasu Matsumoto, Kosuke Nakamura, Futoshi Kadonome, Takanari Kayamori
  • Publication number: 20110294059
    Abstract: Disclosed is a toner comprising at least a binder resin, a colorant and a polyurethane resin, wherein the polyurethane resin is a carboxy-denatured polyurethane resin.
    Type: Application
    Filed: May 23, 2011
    Publication date: December 1, 2011
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Kentarou MOGI, Noboru UEDA, Hiroyuki KOZURU