Patents by Inventor Hiroyuki Yasukawa
Hiroyuki Yasukawa 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: 8298736Abstract: Provided is a toner comprising toner particles containing a binder resin and coloring matters, wherein the coloring matters comprise a dye represented by Formula (X-1), a metal compound represented by Formula (1) and a quinacridone pigment represented by Formula (2):Type: GrantFiled: May 15, 2009Date of Patent: October 30, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Naohiro Hirose, Hiroyuki Yasukawa, Natsuko Kusaka, Miyuki Murakami, Yohei Ohno
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Patent number: 8282720Abstract: A cyan ink for inkjet recording comprising at least one of a phthalocyanine compound represented by Formula (1) and a phthalocyanine compound represented by Formula (2), Z being represented by Formula (3):Type: GrantFiled: December 28, 2009Date of Patent: October 9, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Natsuko Kusaka, Naohiro Hirose, Hiroyuki Yasukawa
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Publication number: 20120219892Abstract: Disclosed is a green toner for developing a static latent image containing a binder resin and a colorant, and the colorant contains C.I. Solvent Green 5 and colorant compound X represented by Formula (1), and content ratio of C.I. Solvent Green 5 in whole amount of the colorant is 5 to 50% by weight, in the Formula (1), M1 is a metal atom of Group 14, Q is independently a monovalent substituent, m and n are each 0 or 1, at least one of m and n is 1, and A is independently an atomic group forming an aromatic ring which may have a substituent.Type: ApplicationFiled: February 13, 2012Publication date: August 30, 2012Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Yohei OHNO, Hajime TADOKORO, Kaori MATSUSHIMA, Hiroyuki YASUKAWA, Ito KOGA
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Patent number: 8241827Abstract: An electrostatic image developing toner which is capable of obtaining highly chromatic full-color images of bright color without causing perceived color contamination and exhibits superior lightfastness is disclosed, wherein the toner comprises a binding resin and a colorant, and the colorant is tetraazaporphyrin or phthalocyanine compounds such as a compound represented by the following formula:Type: GrantFiled: October 16, 2007Date of Patent: August 14, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Hiroyuki Yasukawa, Mikio Kouyama, Kenji Hayashi, Tomoko Sakimura, Hiroaki Obata, Natsuko Kusaka
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Patent number: 8241826Abstract: Disclosed is a full-color image forming method by which an image exhibiting comfortable image quality reliably suitable for a human visual system can be obtained in such a way that a halftone image exhibiting excellent granularity and evenness thereof is acquired.Type: GrantFiled: May 1, 2009Date of Patent: August 14, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Shiro Hirano, Mikio Kouyama, Kenji Hayashi, Hiroyuki Yasukawa
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Publication number: 20120135343Abstract: Provided is a toner for an electrostatic charge image development having toner particles which contain: a binder resin; a colorant; and a compound represented by Formula (1) in an amount of 0.1 to 65 ppm based on the total weight of the toner particles: wherein R1 and R2 each respectively represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an aryl group.Type: ApplicationFiled: February 1, 2012Publication date: May 31, 2012Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Natsuko KUSAKA, Naohiro HIROSE, Tatsuya NAGASE, Hiroyuki YASUKAWA
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Patent number: 8187782Abstract: Disclosed is a process of forming a full color image according to electrophotography, employing a yellow toner, a magenta toner and a cyan colorant, the process comprising the step of forming a yellow toner image, a magenta toner image and a cyan toner image on a recording material, wherein the yellow toner image has reflectance (in terms of %) satisfying formulas (11) through (14) below, the magenta toner image has reflectance (in terms of %) satisfying formulas (21) through (24) below, and the cyan toner image has reflectance (in terms of %) satisfying formulas (31) through (34) below.Type: GrantFiled: May 13, 2009Date of Patent: May 29, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Tatsuya Fujisaki, Mikio Kouyama, Kenji Hayashi, Hiroyuki Yasukawa, Natsuko Kusaka
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Patent number: 8163451Abstract: An electrostatic latent image developing toner comprising at least a resin, a wax and a colorant, wherein the wax comprises 40 to 98% by mass of a first release agent comprising an ester wax and 2 to 60% by mass of a second release agent comprising a hydrocarbon having at least one of a branched chain structure and a cyclic structure; and the colorant comprises a silicon phthalocyanine represented by Formula (I):Type: GrantFiled: May 19, 2009Date of Patent: April 24, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Naohiro Hirose, Meizo Shirose, Hiroyuki Yasukawa, Shiro Hirano, Tatsuya Fujisaki
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Publication number: 20120045718Abstract: Disclosed is a cyan toner for developing an electrostatic image containing a cyan colorant, and the cyan colorant comprises colorant compound X represented by Formula (1) and colorant compound Y represented by Formula (2). wherein M1 is a metal atom of Group 14, Q is independently a monovalent substituent, m and n are each 0 or 1, at least one of m and n is 1, and A is independently an atomic group forming an aromatic ring which may have a substituent, wherein, M2 is Zn or Al, and A is independently an atomic group forming an aromatic ring which may have a substituent.Type: ApplicationFiled: July 29, 2011Publication date: February 23, 2012Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Hiroyuki YASUKAWA, Hajime TADOKORO, Kaori MATSUSHIMA, Ito KOGA, Yohei OHNO
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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: 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: 20110207037Abstract: Disclosed is a manufacturing method for forming a full color image and an apparatus for forming a full color image exhibiting excellent color chroma for a secondary color and extension of a color reproduction area in a range of red to orange color. A method for forming a full color image using at least six colors of an electrostatic image developing toner each comprising a resin and a colorant, wherein six colors of an electrostatic image developing toner are a yellow toner, a magenta toner, a cyan toner, an orange toner, a green toner and a black toner, and the colorant containing in the orange toner is a pyrazolone pigment.Type: ApplicationFiled: February 10, 2011Publication date: August 25, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Hiroyuki YASUKAWA, Hajime TADOKORO, Kaori SOEDA, Hidemasa SAWADA, Miyuki MURAKAMI, Yohei OHNO
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Publication number: 20110151367Abstract: Provided is an electrostatic charge image developing toner capable of reproducing color exhibiting high lightness and chroma, and obtaining a wide color reproduction range. Disclosed is the toner possessing a toner particle containing at least a binder resin and a colorant, wherein the colorant possesses a yellowish color nonfluorescent dye exhibiting a peak wavelength of an absorption spectrum being in a wavelength range of 400-480 nm, and a fluorescent dye exhibiting a peak wavelength of an emission spectrum being in a wavelength range of 480-560 nm, wherein the nonfluorescent dye has a content of 2-8 parts by weight, based on 100 parts by weight of the binder resin, and the fluorescent dye has a content of 0.05-0.2 parts by weight, based on 100 parts by weight of the resin, provided that a content ratio of the nonfluorescent dye to the fluorescent dye is 15-150.Type: ApplicationFiled: December 7, 2010Publication date: June 23, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Hidehito HARUKI, Hiroyuki YASUKAWA, Shinya OBARA
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Publication number: 20110151362Abstract: An electrostatic image developing gray toner is disclosed. The gray toner is composed of toner particles comprising a binding resin, two species of chromatic color coloring agents and carbon black in an amount of 0 to 0.001 weight % of amount of the chromatic color coloring agents, the toner having brightness L* of 30 to 90 and chroma C* of not more than 10 in L*a*b* color system measured in single solid toner image formed by only the gray toner having an amount of toner attached of 4 g/m2, and the two species of chromatic color coloring agents satisfying mutually complementary color relation.Type: ApplicationFiled: December 6, 2010Publication date: June 23, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Hiroyuki YASUKAWA, Kaori SOEDA, Miyuki MURAKAMI
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Publication number: 20110008720Abstract: Disclosed are a toner for developing an electrostatic image, a full color toner kit and an image formation method, the toner containing at least a resin and a colorant, wherein the colorant comprises a quinacridone pigment having a number average primary particle size of from 30 to 150 nm and having a ratio of a major axis direction length to a minor axis direction length of from 1.0 to 2.0 and Pigment Red 238.Type: ApplicationFiled: July 2, 2010Publication date: January 13, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Hiroyuki YASUKAWA, Hiroshi YAMAZAKI, Kaori SOEDA
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Patent number: 7807327Abstract: A method for producing an electrophotographic toner comprising the step of polymerizing two or more polymerizable monomers under existence of a non-polar liquid hydrocarbon, wherein at least one of the polymerizable monomers comprises a polar group; a kinematic viscosity of the liquid hydrocarbon at 40° C. is in the range of 7-300 mm2/s.Type: GrantFiled: January 17, 2006Date of Patent: October 5, 2010Assignee: Konica Minolta Business Technologies, Inc.Inventors: Kenji Hayashi, Mikio Koyama, Hiroyuki Yasukawa
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Patent number: 7759035Abstract: An object is to provide an electrostatic charge image developing toner and an image forming method using the same capable of maintaining image properties for a long duration, which exhibit not only sufficient transparency and chromaticness, accompanied with high color reproduction and excellent charging characteristic, but also excellent heat resistance, together further with excellent light fastness and sufficient image holding ability. Disclosed is an electrostatic charge image developing toner of the present invention comprising a binder resin for toner particle formation and colorant particles dispersed in the binder resin, wherein the colorant particles comprise a dye and an antioxidant. Further, the electrostatic charge image developing toner wherein a volume-based median particle diameter of the colorant particles is preferably 10-100 nm, and also the dye contained in the colorant particles is preferably an oil-soluble dye or a metal chelate dye.Type: GrantFiled: December 1, 2006Date of Patent: July 20, 2010Assignee: Konica Minolta Business Technologies, Inc.Inventors: Hidetaka Ninomiya, Mikio Kouyama, Takato Chiba, Kenji Hayashi, Hiroyuki Yasukawa
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Publication number: 20100175584Abstract: A cyan ink for inkjet recording comprising at least one of a phthalocyanine compound represented by Formula (1) and a phthalocyanine compound represented by Formula (2), Z being represented by Formula (3):Type: ApplicationFiled: December 28, 2009Publication date: July 15, 2010Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Natsuko KUSAKA, Naohiro HIROSE, Hiroyuki YASUKAWA