Patents by Inventor Kaori Soeda

Kaori Soeda 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: 8841051
    Abstract: Provided is a full color image forming method wherein high color reproducibility especially on a blue system and a green system can be obtained and an excellent gradation property can be obtained in a full color image to be obtained. The full color image forming method for forming a full color image by using at least yellow toner, magenta toner, and two kinds of cyan toners (1, 2) is characterized in that a toner image formed by the cyan toner (1) alone has the value of the maximum color saturation (C*) of not less than 50 and the value of lightness (L*) in a color space represented by an L*a*b* colorimetric system of not less than 30 and not more than 52, and that a toner image formed by the cyan toner (2) alone has the value of the maximum color saturation (C*) of not less than 50 and the value of the lightness (L*) in the color space represented by the L*a*b* colorimetric system of not less than 58 and not more than 75.
    Type: Grant
    Filed: July 13, 2009
    Date of Patent: September 23, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Shiro Hirano, Naohiro Hirose, Kaori Soeda, Miyuki Murakami, Youhei Ohno
  • Patent number: 8663884
    Abstract: An orange toner for developing electrostatic charge images includes a binder resin; and a colorant including a first color material and a second color material; wherein the first color material has a hue angle of ?20° to 80° in a L*a*b* color system, the second color material includes C.I. Solvent Orange 63, and the second color material has a content of 0.05 to 0.2 parts by mass to 100 parts by mass of the binder resin.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: March 4, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Yohei Ohno, Kaori Soeda, Miyuki Murakami
  • Patent number: 8570597
    Abstract: Disclosed is an image forming apparatus including a color converter for converting cyan, magenta and yellow components of a first image signal to equivalent neutral density, calculating a first gray component from cyan, magenta and yellow components of equivalent neutral density, subtracting the first gray component from each of the cyan, magenta and yellow components of equivalent neutral density, subjecting each of the cyan, magenta and yellow components of equivalent neutral density from which the first gray component is subtracted to an inverse conversion of the equivalent neutral density conversion, and outputting a second image signal comprising cyan, magenta and yellow components which are obtained by carrying out the inverse conversion to the cyan, magenta and yellow components of equivalent neutral density from which the first gray component is subtracted, the first black component and the first gray component; an image forming section for forming an image on a paper based on the second image signal
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: October 29, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Kaori Soeda, Koji Washio, Hidemasa Sawada
  • Patent number: 8431295
    Abstract: 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: Grant
    Filed: July 2, 2010
    Date of Patent: April 30, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Hiroyuki Yasukawa, Hiroshi Yamazaki, Kaori Soeda
  • Patent number: 8236472
    Abstract: 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: Grant
    Filed: November 24, 2009
    Date of Patent: August 7, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Tatsuya Fujisaki, Kaori Soeda, Shinya Obara, Natsuko Kusaka
  • Patent number: 8178267
    Abstract: A set of toners comprising a yellow toner, a magenta toner, a cyan toner and a black toner for forming a full color image with an electrophotographic method, wherein the yellow toner comprises toner particles containing at least one pigment selected from the group consisting of C.I. Pigment Yellow 74, C.I. Pigment Yellow 139, C.I. Pigment Yellow 155, C.I. Pigment Yellow 180 and C.I.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: May 15, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Naohiro Hirose, Meizo Shirose, Kaori Soeda, Shiro Hirano, Shinya Obara
  • Patent number: 8084175
    Abstract: Provided is a set of toners comprising a yellow toner, a magenta toner, a cyan toner and a black toner for forming a full color image with an electrophotographic method, wherein the yellow toner comprises toner particles containing at east one pigment selected from the group consisting of C. I. Pigment Yellow 74, C. I. Pigment Yellow 139, C. I. Pigment Yellow 180, C. I. Pigment Yellow 185 and C. I.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: December 27, 2011
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Naohiro Hirose, Kaori Soeda, Shinya Obara, Tatsuya Fujisaki, Yohei Ohno
  • Publication number: 20110223528
    Abstract: An orange toner for developing electrostatic charge images includes a binder resin; and a colorant including a first color material and a second color material; wherein the first color material has a hue angle of ?20° to 80° in a L*a*b* color system, the second color material includes C.I. Solvent Orange 63, and the second color material has a content of 0.05 to 0.2 parts by mass to 100 parts by mass of the binder resin.
    Type: Application
    Filed: March 2, 2011
    Publication date: September 15, 2011
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Yohei OHNO, Kaori SOEDA, Miyuki MURAKAMI
  • Publication number: 20110216381
    Abstract: Disclosed is an image forming apparatus including a color converter for converting cyan, magenta and yellow components of a first image signal to equivalent neutral density, calculating a first gray component from cyan, magenta and yellow components of equivalent neutral density, subtracting the first gray component from each of the cyan, magenta and yellow components of equivalent neutral density, subjecting each of the cyan, magenta and yellow components of equivalent neutral density from which the first gray component is subtracted to an inverse conversion of the equivalent neutral density conversion, and outputting a second image signal comprising cyan, magenta and yellow components which are obtained by carrying out the inverse conversion to the cyan, magenta and yellow components of equivalent neutral density from which the first gray component is subtracted, the first black component and the first gray component; an image forming section for forming an image on a paper based on the second image signal
    Type: Application
    Filed: February 23, 2011
    Publication date: September 8, 2011
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Kaori SOEDA, Koji WASHIO, Hidemasa SAWADA
  • Publication number: 20110207037
    Abstract: 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: Application
    Filed: February 10, 2011
    Publication date: August 25, 2011
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Hiroyuki YASUKAWA, Hajime TADOKORO, Kaori SOEDA, Hidemasa SAWADA, Miyuki MURAKAMI, Yohei OHNO
  • Publication number: 20110151362
    Abstract: 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: Application
    Filed: December 6, 2010
    Publication date: June 23, 2011
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Hiroyuki YASUKAWA, Kaori SOEDA, Miyuki MURAKAMI
  • Patent number: 7910273
    Abstract: An electrophotographic image forming method is disclosed. In the method electrostatic latent image is developed by a non-magnetic single-component developing system, in which a non-magnetic single-component developer is conveyed by a developer carrying member, the developer carrying member is contacted with a developer layer regulation member for regulating an amount of the developer at the surface of the developer carrying member, and a binder resin of the developer comprises a vinyl polymer having an acid value of from about 5 to about 30 mgKOH/g and a ratio of hydroxyl group value/acid values from about 0.3 to about 0.8.
    Type: Grant
    Filed: May 9, 2007
    Date of Patent: March 22, 2011
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Masahiko Nakamura, Masahiro Anno, Kaori Soeda, Tomoko Mine, Kenichi Onaka, Eiichi Yoshida
  • Publication number: 20110008720
    Abstract: 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: Application
    Filed: July 2, 2010
    Publication date: January 13, 2011
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Hiroyuki YASUKAWA, Hiroshi YAMAZAKI, Kaori SOEDA
  • Publication number: 20110008071
    Abstract: Provided is a full color image forming method wherein high color reproducibility especially on a blue system and a green system can be obtained and an excellent gradation property can be obtained in a full color image to be obtained. The full color image forming method for forming a full color image by using at least yellow toner, magenta toner, and two kinds of cyan toners (1, 2) is characterized in that a toner image formed by the cyan toner (1) alone has the value of the maximum color saturation (C*) of not less than 50 and the value of lightness (L*) in a color space represented by an L*a*b* colorimetric system of not less than 30 and not more than 52, and that a toner image formed by the cyan toner (2) alone has the value of the maximum color saturation (C*) of not less than 50 and the value of the lightness (L*) in the color space represented by the L*a*b* calorimetric system of not less than 58 and not more than 75.
    Type: Application
    Filed: July 13, 2009
    Publication date: January 13, 2011
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Shiro Hirano, Naohiro Hirose, Kaori Soeda, Miyuki Murakami, Youhei Ohno
  • Patent number: 7807325
    Abstract: An electrostatic image developing toner is disclosed, comprising a resin and a colorant, wherein the toner contains at least one iminocarboxylic acid or its salt in an amount of from 26 to 388 ppm by mass.
    Type: Grant
    Filed: January 24, 2007
    Date of Patent: October 5, 2010
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Eiichi Yoshida, Masahiko Nakamura, Kaori Soeda, Tomoko Mine, Kenichi Onaka
  • Patent number: 7767092
    Abstract: A method of decolorizing a colored effluent comprising (i) a colored substance; and (ii) a polyvalent carboxylic acid or a polyvalent aminocarboxylic acid, the method including the steps of: (a) controlling a hydrogen ion exponent (pH) of the colored effluent to be in a range in which two or more carboxylic acid groups in the polyvalent carboxylic acid or the polyvalent aminocarboxylic acid does not dissociate; (b) adding an inorganic metal salt to the colored effluent so as to allow the inorganic metal salt to react with the colored substance to form a precipitation in the colored effluent, and (c) eliminating the precipitation from the colored effluent.
    Type: Grant
    Filed: October 4, 2007
    Date of Patent: August 3, 2010
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Eiichi Yoshida, Masahiko Nakamura, Kaori Soeda
  • Publication number: 20100136476
    Abstract: 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: Application
    Filed: November 24, 2009
    Publication date: June 3, 2010
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Tatsuya FUJISAKI, Kaori SOEDA, Shinya OBARA, Natsuko KUSAKA
  • Patent number: 7727698
    Abstract: Disclosed is an image forming method comprising developing a latent electrostatic image formed on the surface of a latent electrostatic image bearing body by a developer borne and conveyed by a developer bearing body which is brought into contact with a developer layer control member to control an amount of the developer on the surface of the developer bearing body through a nonmagnetic single-component development system, wherein an acid value (SAV) of the surface of the developer and a total acid value (TAV) of the developer meet the following requirements: 1<SAV/TAV?5 and 5?TAV?25, and a ratio of a mass average particle size (d50, ?m) of the developer to a surface roughness (Ra, ?m), d50/Ra being in a range of 0.5 to 3.0 and an average spacing (Sm) between protruding peaks of the developer bearing body being in a range of 20 to 200 ?m.
    Type: Grant
    Filed: June 19, 2007
    Date of Patent: June 1, 2010
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Eiichi Yoshida, Masahiko Nakamura, Masahiro Anno, Kaori Soeda, Tomoko Mine, Kenichi Onaka
  • Publication number: 20090291377
    Abstract: A set of toners comprising a yellow toner, a magenta toner, a cyan toner and a black toner for forming a full color image with an electrophotographic method, wherein the yellow toner comprises toner particles containing at least one pigment selected from the group consisting of C. I. Pigment Yellow 74, C. I. Pigment Yellow 139, C. I. Pigment Yellow 155, C. I. Pigment Yellow 180 and C. I.
    Type: Application
    Filed: May 20, 2009
    Publication date: November 26, 2009
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Naohiro HIROSE, Meizo Shirose, Kaori Soeda, Shiro Hirano, Shinya Obara
  • Publication number: 20090291378
    Abstract: Provided is a set of toners comprising a yellow toner, a magenta toner, a cyan toner and a black toner for forming a full color image with an electrophotographic method, wherein the yellow toner comprises toner particles containing at east one pigment selected from the group consisting of C. I. Pigment Yellow 74, C. I. Pigment Yellow 139, C. I. Pigment Yellow 180, C. I. Pigment Yellow 185 and C. I.
    Type: Application
    Filed: May 19, 2009
    Publication date: November 26, 2009
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Naohiro HIROSE, Kaori SOEDA, Shinya OBARA, Tatsuya FUJISAKI, Yohei OHNO