Patents by Inventor Natsuko Kusaka
Natsuko Kusaka 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: 8349532Abstract: 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: GrantFiled: February 1, 2012Date of Patent: January 8, 2013Assignee: Konica Minolta Business Technologies, Inc.Inventors: Natsuko Kusaka, Naohiro Hirose, Tatsuya Nagase, Hiroyuki Yasukawa
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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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Patent number: 8247145Abstract: A magenta toner for developing an electrostatic image, the magenta toner comprising at least a binder resin and a magenta colorant, wherein the magenta colorant comprises a compound represented by Formula (1), wherein D is represented by one of Formulas (2) to (4):Type: GrantFiled: August 8, 2008Date of Patent: August 21, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Natsuko Kusaka, Mikio Kouyama, Kenji Hayashi, Hiroaki Obata
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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: 8236472Abstract: Provided is a method for forming an image with a set of electrostatic charge image developing toners using a digital electrophotographic method, provided that the set of electrostatic charge image developing toners comprises a black toner and a light gray toner, the method comprising the steps of: forming an electrostatic latent image on an image support; developing the electrostatic latent image with the black toner to form a black toner image; developing the electrostatic latent image with the light gray toner to form a light gray toner image; and fixing the black toner image and the light gray toner image, wherein the black toner and the light gray toner each independently contains a wax having an endothermic peak in the range of 60 to 105° C.; and the light gray toner has a transmittance in the range of 40 to 90%.Type: GrantFiled: November 24, 2009Date of Patent: August 7, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Tatsuya Fujisaki, Kaori Soeda, Shinya Obara, Natsuko Kusaka
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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: 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: 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
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Publication number: 20100159383Abstract: The method for manufacturing a color print by an electrophotographic image forming process employs forming toner images by non-contact developing electrostatic latent images on electrostatic latent image holding members in developing devices. For each color, cyan, magenta and yellow, there is a separate electrostatic latent image, a separate electrostatic latent image holding member and a separate developing device. In each developing device the holding member is arranged in a non-contact position with respect to the electrostatic latent image holding member at a development portion. The non-contact developing is carried out by flying the toner from the toner holding member to the electrostatic latent image holding member. The cyan toner exhibits a maximum chroma at lightness L*C of from 53-70.Type: ApplicationFiled: December 17, 2009Publication date: June 24, 2010Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Shinya OBARA, Shiro HIRANO, Natsuko KUSAKA, Hidehito HARUKI
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Publication number: 20100136476Abstract: Provided is a method for forming an image with a set of electrostatic charge image developing toners using a digital electrophotographic method, provided that the set of electrostatic charge image developing toners comprises a black toner and a light gray toner, the method comprising the steps of: forming an electrostatic latent image on an image support; developing the electrostatic latent image with the black toner to form a black toner image; developing the electrostatic latent image with the light gray toner to form a light gray toner image; and fixing the black toner image and the light gray toner image, wherein the black toner and the light gray toner each independently contains a wax having an endothermic peak in the range of 60 to 105° C.; and the light gray toner has a transmittance in the range of 40 to 90%.Type: ApplicationFiled: November 24, 2009Publication date: June 3, 2010Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Tatsuya FUJISAKI, Kaori SOEDA, Shinya OBARA, Natsuko KUSAKA
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Publication number: 20090291375Abstract: 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: ApplicationFiled: May 13, 2009Publication date: November 26, 2009Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Tatsuya FUJISAKI, Mikio KOUYAMA, Kenji HAYASHI, Hiroyuki YASUKAWA, Natsuko KUSAKA
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Publication number: 20090291381Abstract: 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: ApplicationFiled: May 15, 2009Publication date: November 26, 2009Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Naohiro Hirose, Hiroyuki Yasukawa, Natsuko Kusaka, Miyuki Murakami, Yohei Ohno
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Publication number: 20090258309Abstract: 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: March 25, 2009Publication date: October 15, 2009Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Natsuko KUSAKA, Naohiro HIROSE, Tatsuya NAGASE, Hiroyuki YASUKAWA
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Publication number: 20090162776Abstract: 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: ApplicationFiled: December 15, 2008Publication date: June 25, 2009Inventors: Kenji Hayashi, Mikio Kouyama, Hiroyuki Yasukawa, Hiroaki Obata, Natsuko Kusaka
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Publication number: 20090123861Abstract: 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: ApplicationFiled: November 7, 2008Publication date: May 14, 2009Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Mikio Kouyama, Kenji Hayashi, Tomoko Sakimura, Hiroyuki Yasukawa, Hiroaki Obata, Natsuko Kusaka