Patents by Inventor Mikio Kouyama
Mikio Kouyama 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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Publication number: 20120021353Abstract: Disclosed is a method for producing toner, comprising (1) mixing, with an aqueous medium, a resin solution of an organic solvent in which amorphous polyester resin having unsaturated dicarboxylic acid monomer units is dissolved, and forming an amorphous polyester resin particle dispersion; (2) adding a radical polymerization initiator to the amorphous polyester resin particle dispersion obtained in (1), cross-linking the amorphous polyester resin, and forming a cross-linked amorphous polyester resin particle dispersion; and (3) mixing at least the cross-linked amorphous polyester resin particle dispersion obtained in (2), with a crystalline polyester resin particle dispersion, aggregating cross-linked amorphous polyester resin particles and crystalline polyester resin particles, and forming toner particles.Type: ApplicationFiled: July 19, 2011Publication date: January 26, 2012Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Hiroshi NAGASAWA, Mikio KOUYAMA, Kenji HAYASHI, Hiroaki OBATA
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Patent number: 8092964Abstract: Disclosed is a toner comprising a resin and a colorant, wherein the colorant comprises a compound represented by formula (I) and a compound represented by formula (II).Type: GrantFiled: August 19, 2008Date of Patent: January 10, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Kenji Hayashi, Mikio Kouyama, Tomoko Sakimura, Hiroyuki Yasukawa, Hiroaki Obata, Natsuko Kusaka
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Patent number: 8062819Abstract: A magenta toner for developing an electrostatic image composed of a binder and a colorant is disclosed. The toner contains a tone controlling agent having a peak of fluorescent spectrum from 380 to 500 nm. An image excellent in light fastness and durability can be obtained and high color reproducibility with sufficient transparency and chromaticness can be realized by the magenta toner.Type: GrantFiled: March 7, 2008Date of Patent: November 22, 2011Assignee: Konica Minolta Business Technologies, Inc.Inventors: Hiroyuki Yasukawa, Mikio Kouyama, Kenji Hayashi, Hiroaki Obata, Natsuko Kusaka
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Patent number: 8062818Abstract: An electrophotographic toner for electrostatic image development which is capable of obtaining a high chroma full-color image exhibiting clear color without color contamination and excellent light stability is disclosed, comprising a resin and a colorant, wherein the colorant comprises a pigment of C.I. Pigment Blue 76. There are also disclosed a full-color toner kit and an image forming method by use of the toner.Type: GrantFiled: March 18, 2009Date of Patent: November 22, 2011Assignee: Konica Minolta Business Technologies, Inc.Inventors: Mikio Kouyama, Hiroshi Yamazaki, Ken Ohmura, Kenji Hayashi
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Patent number: 8053153Abstract: An electrophotographic toner containing a resin and a colorant is disclosed. The colorant is represented by the formula in the formula, M1 is a silicon atom (Si), a germanium atom (Ge) and a tin atom (Sn); Z is independently a chlorine atom, a hydroxy group, an alkoxy group having 1 to 8 carbon atoms, or an aryloxy group having 6 to 8 carbon atoms; and A1, A2, A3 and A4 are each independently an atomic group defined in the specification.Type: GrantFiled: November 7, 2008Date of Patent: November 8, 2011Assignee: Konica Minolta Business Technologies, Inc.Inventors: Mikio Kouyama, Kenji Hayashi, Tomoko Sakimura, Hiroyuki Yasukawa, Hiroaki Obata, Natsuko Kusaka
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Patent number: 8034520Abstract: Disclosed is a magenta toner, which contains magenta colorants composed of compound A represented by Formulas (1), (2) or (3) in an amount of mA and compound B selected from a group consisting of a mono-azo pigment, a naphthol pigment and rhodamine chelate pigment in an amount of mA, and a ratio of amount mA:mB is 90:10 to 55:45. are described in the specification.Type: GrantFiled: December 15, 2008Date of Patent: October 11, 2011Assignee: Konica Minolta Business Technologies, Inc.Inventors: Kenji Hayashi, Mikio Kouyama, Hiroyuki Yasukawa, Hiroaki Obata, Natsuko Kusaka
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Publication number: 20110236819Abstract: Provided is a toner containing toner particles containing a polyester resin which has a structure part represented by Formula (1): wherein, “A” represents a polyester structure unit having at least one linking group; R1 represents a hydrogen atom, or a chlorine atom; R2 represents a hydrogen atom, a chlorine atom, or a methoxy group; and “L” represents a divalent organic group.Type: ApplicationFiled: March 17, 2011Publication date: September 29, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Mikio KOUYAMA, Ken OHMURA, Kenji HAYASHI, Hiroaki OBATA, Koji SHIBATA
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Publication number: 20110223534Abstract: A hydrophobilization method is disclosed, comprising subjecting particles to a hydrophobilizing treatment in an aqueous medium with a hydrophobilizing agent to hydrophobilize surfaces of the particles, wherein the surfaces of the particles are hydrophobilized with the hydrophobilizing agent in the presence of a phase transfer catalyst.Type: ApplicationFiled: March 2, 2011Publication date: September 15, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Koji SHIBATA, Mikio KOUYAMA, Kenji HAYASHI, Yukio HOSOYA, Hiroaki OBATA
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Publication number: 20110212398Abstract: A toner for developing electrostatic latent images, including a binder resin, and a colorant, wherein the binder resin includes an amorphous resin obtained from a radical polymerizable monomer unit containing a styrene type monomer and a (meth)acrylic ester type monomer and a crystalline resin, and a ratio (Q2/Q1) is 0.85 or more, where Q1 represents an amount of absorbed heat based on an endothermic peak derived from the crystalline resin in a first temperature rising process from 0° C. to 200° C. in measurement with a differential scanning calorimeter, and Q2 represents an amount of absorbed heat based on an endothermic peak derived from the crystalline resin in a second temperature rising process from 0° C. to 200° C.Type: ApplicationFiled: February 18, 2011Publication date: September 1, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Kenji HAYASHI, Mikio KOUYAMA, Hiroaki OBATA, Koji SHIBATA
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Publication number: 20110177452Abstract: A production method of a toner for developing an electrostatic image composed of toner parent particles and external additives adhered to a surface the toner parent particles is disclosed. The method includes steps of preparing toner parent particles dispersion liquid in which toner parent particles are dispersed in a medium, first mixing the dispersion liquid with a quaternary ammonium salt compound and a water soluble organic solvent to prepare liquid mixture, and second mixing the liquid mixture with external additive dispersion liquid in which negative charged external additives are dispersed.Type: ApplicationFiled: January 7, 2011Publication date: July 21, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Yukio HOSOYA, Mikio KOUYAMA, Kenji HAYASHI, Hiroaki OBATA, Koji SHIBATA
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Patent number: 7969643Abstract: Display particles for an image display apparatus, wherein the image display apparatus comprises two substrates at least one of which is transparent, with the display particles being sealed between the substrates in a powder state, so that by generating an electric field between the substrates, the display particles are moved to display an image, wherein the display particles are formed through processes in which at least a binder resin and a colorant are kneaded and pulverized to give core particles, resin fine particles are fixed and fused on surfaces of the core particles, and then the core particles on which the resin fine particles are fixed and fused are sphered to give an average degree of roundness of 0.960 or more, and wherein a ratio of use of the resin fine particles is set in the range from 100 to 300% in the rate of the total projection area of the resin fine particles relative to the total surface area of the core particles, as well as an image display apparatus loaded with the display particles.Type: GrantFiled: June 17, 2010Date of Patent: June 28, 2011Assignee: Konica Minolta Business Technologies, Inc.Inventors: Okushi Okuyama, Yukio Hosoya, Satoshi Uchino, Hiroyuki Konno, Kouji Shibata, Mikio Kouyama
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Publication number: 20110143275Abstract: A method of producing a water dispersion of polyester resin particles containing the steps of: emulsifying and dispersing at least a diol, a dicarboxylic acid and at least one polycondensation catalyst selected from a surfactant catalyst and a rare earth metal catalyst in water to form an emulsified dispersion liquid; and irradiating the emulsified dispersion liquid with a microwave to conduct a polycondensation reaction, whereby polyester resin particles are produced.Type: ApplicationFiled: December 10, 2010Publication date: June 16, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Hiroaki OBATA, Mikio KOUYAMA, Kenji HAYASHI, Yukio HOSOYA, Koji SHIBATA
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Patent number: 7952794Abstract: An image display apparatus including: two substrates at least one of which is transparent; and display particles that are sealed between the substrates in a powder state so that by generating an electric field between the substrates, the display particles are moved to display an image; wherein, of contact surfaces with the display particles in a gap between the substrates, both of the surfaces on the substrate sides have oxide layers of the same metal, and the display particles include positively chargeable display particles and negatively chargeable display particles, and both of the positively chargeable display particles and the negatively chargeable display particles have structures obtained by successively forming oxide layers of the same metal as that of the metal oxide layers possessed by the surfaces on the substrate sides and organic layers on the surfaces of base particles that contain at least a resin and a colorant.Type: GrantFiled: May 21, 2010Date of Patent: May 31, 2011Assignee: Konica Minolta Business Technologies, Inc.Inventors: Yukio Hosoya, Okushi Okuyama, Satoshi Uchino, Hiroyuki Konno, Kouji Shibata, Mikio Kouyama
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Publication number: 20110123917Abstract: In the present invention, provided is a toner suitable for fixing at low temperature, which exhibits excellent performance against thermal stress as well as mechanical stress with no generation of blocking even during storage for a long duration in an unused state, and also with no generation of tacking of toner images after fixing. Also disclosed is a toner comprising at least a binder resin, a colorant and a wax, the toner comprising a fatty acid ester wax comprising a hydroxyl group, and an aliphatic alcohol.Type: ApplicationFiled: September 11, 2009Publication date: May 26, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Kenji Hayashi, Mikio Kouyama, Hiroaki Obata, Noriyuki Kimpara, Hiroshi Nagasawa
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Publication number: 20110123754Abstract: Provided is a structural color display material containing a sheet of substrate having: an adhesive layer on a rear surface of the substrate; and a structural color display layer which contains structural color particles and a matrix and exhibits a structural color on a front surface of the substrate, wherein the front surface of the substrate on which is formed the structural color display layer exhibits a water contact angle of 60 to 100°.Type: ApplicationFiled: November 11, 2010Publication date: May 26, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Aya SHIRAI, Mikio KOUYAMA, Kenshi MIYAJIMA
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Publication number: 20110104604Abstract: Disclosed is a manufacturing method of a toner including a vinyl series resin being a polymer of a radical polymerizable monomer, and a coloring agent, the method comprising: dispersing a crystalline organic compound having an unsaturated bond in an aqueous medium to prepare a dispersion liquid of the crystalline organic compound; causing a radical polymerization reaction between an unsaturated bond part of the crystalline organic compound and the radical polymerizable monomer after adding the radical polymerizable monomer to the dispersion liquid of the crystalline organic compound, to prepare a dispersion liquid of resin particles including the obtained polymer; and mixing at least the dispersion liquid of the resin particles and a dispersion liquid of coloring agent particles, and aggregating the resin particles and the coloring agent particles to form toner particles.Type: ApplicationFiled: November 1, 2010Publication date: May 5, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Kenji HAYASHI, Hiroaki OBATA, Yukio HOSOYA, Kouji SHIBATA, Mikio KOUYAMA
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Publication number: 20110091806Abstract: Disclosed is a toner manufacturing method, comprising: dispersing a polyester resin prepared by condensing a polyol and a polycarboxylic acid into an aqueous medium and adjusting a polyester resin particle dispersion liquid, wherein the polyol includes an unsaturated polyol, or the polycarboxylic acid includes an unsaturated polycarboxylic acid; and adding a radical polymerization initiator to the polyester resin particle dispersion liquid to cause a radical polymerization reaction, and adjusting the obtained dispersion liquid of polyester resin particles.Type: ApplicationFiled: October 6, 2010Publication date: April 21, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Kenji HAYASHI, Mikio KOUYAMA, Hiroaki OBATA, Noriyuki KINPARA, Yasuhiko MURAMATSU
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Publication number: 20110081611Abstract: Disclosed is a toner manufacturing method, comprising: dispersing a polyester resin prepared by condensing a polyol and an unsaturated polycarboxylic acid into an aqueous medium and preparing a polyester resin particle dispersion liquid; adding a vinyl polymerizable monomer and a radical polymerization initiator to the polyester resin particle dispersion liquid to cause a radical polymerization reaction, followed by preparing a dispersion liquid of resin particles made of a resin in which vinyl polymerizable monomers react with the polyester resin; and mixing at least the resin particles made of the resin in which the vinyl polymerizable monomers react with the polyester resin, and a dispersion liquid of coloring agent particles, and forming toner particles by making the resin particles and the coloring agent particles cohere.Type: ApplicationFiled: September 29, 2010Publication date: April 7, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Kenji HAYASHI, Mikio KOUYAMA, Hiroaki OBATA, Noriyuki KINPARA, Yasuhiko MURAMATSU
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Publication number: 20110070535Abstract: A toner for electrostatic latent image development is disclosed comprising colored particles containing a binder resin and a colorant and external-additive particles attached to the surfaces of the colored particles, wherein the external-additive particles comprise resin particles covered with an inorganic layer, and the resin particles are bound to the inorganic layer by a siloxane bond. A preparation method of the toner is also disclosed.Type: ApplicationFiled: September 16, 2010Publication date: March 24, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Yukio HOSOYA, Mikio KOUYAMA, Kenji HAYASHI, Hiroaki OBATA, Koji SHIBATA
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Publication number: 20110033795Abstract: A toner which can be improved in both low-temperature fixability and offset resistance is disclosed, comprising a colorant and a binder resin containing a polyester ionomer resin which has been reacted with a polyvalent isocyanate compound.Type: ApplicationFiled: July 22, 2009Publication date: February 10, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Mikio Kouyama, Kenji Hayashi, Hiroaki OBata, Noriyuki Kimpara, Hiroshi Nagasawa