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).
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Patent number: 10353311Abstract: 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: GrantFiled: April 9, 2018Date of Patent: July 16, 2019Assignee: KONICA MINOLTA, INC.Inventors: Michiaki Ishikawa, Hiroyuki Kozuru
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Publication number: 20180314175Abstract: 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: ApplicationFiled: April 9, 2018Publication date: November 1, 2018Inventors: Michiaki Ishikawa, Hiroyuki Kozuru
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Patent number: 9354536Abstract: 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: GrantFiled: May 28, 2014Date of Patent: May 31, 2016Assignee: KONICA MINOLTA, INC.Inventors: Kosuke Nakamura, Yoshiyasu Matsumoto, Satoshi Uchino, Hidehito Haruki, Hiroyuki Kozuru
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Patent number: 9309465Abstract: 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: GrantFiled: July 19, 2013Date of Patent: April 12, 2016Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Hiroyuki Kozuru, Akira Kanei, Katsuyuki Tomita, Katsushi Kosuge, Atsushi Kobayashi
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Publication number: 20150309433Abstract: 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: ApplicationFiled: April 9, 2015Publication date: October 29, 2015Inventors: Ikuko SAKURADA, Satoshi Uchino, Yasuko Uchino, Shinya Obara, Futoshi Kadonome, Hiroyuki Kozuru
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Publication number: 20150175891Abstract: 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: ApplicationFiled: July 19, 2013Publication date: June 25, 2015Inventors: Hiroyuki Kozuru, Akira Kanei, Katsuyuki Tomita, Katsushi Kosuge, Atsushi Kobayashi
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Patent number: 9063442Abstract: 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: GrantFiled: January 15, 2014Date of Patent: June 23, 2015Assignee: KONICA MINOLTA, INC.Inventors: Kosuke Nakamura, Hiroyuki Kozuru, Yoshiyasu Matsumoto
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Patent number: 8995887Abstract: 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: GrantFiled: January 15, 2014Date of Patent: March 31, 2015Assignee: Konica Minolta, Inc.Inventors: Kosuke Nakamura, Hiroyuki Kozuru, Yoshiyasu Matsumoto
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Publication number: 20150010862Abstract: 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: ApplicationFiled: July 3, 2014Publication date: January 8, 2015Inventors: Yoshiyasu MATSUMOTO, Kosuke NAKAMURA, Satoshi UCHINO, Hidehito HARUKI, Hiroyuki KOZURU
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Publication number: 20140363762Abstract: 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: ApplicationFiled: May 28, 2014Publication date: December 11, 2014Applicant: Konica Minolta, Inc.Inventors: Kosuke NAKAMURA, Yoshiyasu MATSUMOTO, Satoshi UCHINO, Hidehito HARUKI, Hiroyuki KOZURU
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Publication number: 20140205326Abstract: 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: ApplicationFiled: January 15, 2014Publication date: July 24, 2014Applicant: Konica Minolta, Inc.Inventors: Kosuke NAKAMURA, Hiroyuki KOZURU, Yoshiyasu MATSUMOTO
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Publication number: 20140205327Abstract: 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: ApplicationFiled: January 15, 2014Publication date: July 24, 2014Applicant: Konica Minolta, Inc.Inventors: Kosuke NAKAMURA, Hiroyuki Kozuru, Yoshiyasu Matsumoto
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Patent number: 8507169Abstract: 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: GrantFiled: February 28, 2012Date of Patent: August 13, 2013Assignee: 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
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Patent number: 8435715Abstract: 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: GrantFiled: July 18, 2011Date of Patent: May 7, 2013Assignee: Konica Minolta Business Technologies, Inc.Inventors: Kosuke Nakamura, Hiroyuki Kozuru, Yoshiyasu Matsumoto, Takanari Kayamori, Junya Ueda
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Patent number: 8431320Abstract: 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: GrantFiled: July 20, 2011Date of Patent: April 30, 2013Assignee: Konica Minolta Business Technologies, Inc.Inventors: Masaharu Matsubara, Hiroyuki Kozuru, Noboru Ueda
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Publication number: 20120225379Abstract: 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: ApplicationFiled: February 28, 2012Publication date: September 6, 2012Applicant: 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
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Publication number: 20120028186Abstract: 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: ApplicationFiled: July 18, 2011Publication date: February 2, 2012Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Kosuke NAKAMURA, Hiroyuki KOZURU, Yoshiyasu MATSUMOTO, Takanari KAYAMORI, Junya UEDA
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Publication number: 20120021352Abstract: 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: ApplicationFiled: July 20, 2011Publication date: January 26, 2012Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Masaharu MATSUBARA, Hiroyuki KOZURU, Noboru UEDA
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Patent number: 8080354Abstract: 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: GrantFiled: December 7, 2009Date of Patent: December 20, 2011Assignee: Konica Minolta Business Technologies, Inc.Inventors: Hiroyuki Kozuru, Yoshiyasu Matsumoto, Kosuke Nakamura, Futoshi Kadonome, Takanari Kayamori
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Publication number: 20110294059Abstract: 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: ApplicationFiled: May 23, 2011Publication date: December 1, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Kentarou MOGI, Noboru UEDA, Hiroyuki KOZURU