Patents by Inventor Manabu Ohno

Manabu Ohno 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: 7323282
    Abstract: The toner having a significantly improved dispersibility of a colorant in toner particles is provided. The present invention provides a dry toner comprising: (i) a binder resin; (ii) a colorant; (iii) at least one of metallophthalocyanine and a metallophthalocyanine derivative having a central metal selected from the group consisting of Cr, Fe, Co, Ni, Zn, Mn, Mg, and Al; and (iv) a polymer containing 0.5 to 20% by mass of a base unit derived from a specific polymerizable monomer having an amide group.
    Type: Grant
    Filed: June 5, 2007
    Date of Patent: January 29, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventors: Manabu Ohno, Motoya Fukushima, Hitoshi Itabashi, Yasushi Katsuta, Emi Tosaka, Norikazu Fujimoto
  • Publication number: 20070231729
    Abstract: The toner having a significantly improved dispersibility of a colorant in toner particles is provided. The present invention provides a dry toner comprising: (i) a binder resin; (ii) a colorant; (iii) at least one of metallophthalocyanine and a metallophthalocyanine derivative having a central metal selected from the group consisting of Cr, Fe, Co, Ni, Zn, Mn, Mg, and Al; and (iv) a polymer containing 0.5 to 20% by mass of a base unit derived from a specific polymerizable monomer having an amide group.
    Type: Application
    Filed: June 5, 2007
    Publication date: October 4, 2007
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Manabu Ohno, Motoya Fukushima, Hitoshi Itabashi, Yasushi Katsuta, Emi Tosaka, Norikazu Fujimoto
  • Patent number: 7252917
    Abstract: The toner having a significantly improved dispersibility of a colorant in toner particles is provided. The present invention provides a dry toner comprising: (i) a binder resin; (ii) a colorant; (iii) at least one of metallophthalocyanine and a metallophthalocyanine derivative having a central metal selected from the group consisting of Cr, Fe, C o, Ni, Zn, Mn, Mg, and Al; and (iv) a polymer containing 0.5 to 20% by mass of a base unit derived from a specific polymerizable monomer having an amide group.
    Type: Grant
    Filed: March 10, 2004
    Date of Patent: August 7, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventors: Manabu Ohno, Motoya Fukushima, Hitoshi Itabashi, Yasushi Katsuta, Emi Tosaka, Norikazu Fujimoto
  • Patent number: 7233011
    Abstract: A method of generation of exposure data for charged particle beam exposure using a block mask, in which a first transmission beam is formed by transmission of a charged particle beam through a rectangular first transmission aperture; a second transmission beam is formed by causing the first transmission beam to be transmitted through a block mask having a plurality of discrete patterns; and the second transmission beam irradiates an object for exposure. This exposure data generation method has a step of generating irradiation position data of the first transmission beam on the block mask, such that the Y-direction or X-direction edge of the first transmission beam is positioned in a common isolated area in the X direction or Y direction of the plurality of discrete patterns in the block mask.
    Type: Grant
    Filed: April 15, 2005
    Date of Patent: June 19, 2007
    Assignee: Fujitsu Limited
    Inventors: Takashi Maruyama, Manabu Ohno
  • Publication number: 20060033048
    Abstract: A method of generation of exposure data for charged particle beam exposure using a block mask, in which a first transmission beam is formed by transmission of a charged particle beam through a rectangular first transmission aperture; a second transmission beam is formed by causing the first transmission beam to be transmitted through a block mask having a plurality of discrete patterns; and the second transmission beam irradiates an object for exposure. This exposure data generation method has a step of generating irradiation position data of the first transmission beam on the block mask, such that the Y-direction or X-direction edge of the first transmission beam is positioned in a common isolated area in the X direction or Y direction of the plurality of discrete patterns in the block mask.
    Type: Application
    Filed: April 15, 2005
    Publication date: February 16, 2006
    Applicant: FUJITSU LIMITED
    Inventors: Takashi Maruyama, Manabu Ohno
  • Patent number: 6855471
    Abstract: A toner contains at least a binder resin, a colorant, a compound (A) and a compound (B) in which the compound (A) is selected from the specific compound group and the compound (B) is a derivative of any one of the compounds included in the group from which the compound (A) is selected. The total content A of the compound (A) and compound (B) in the toner is from 0.2% to 6% by weight based on the weight of the toner, and where the content of the cross-linking agent component in the binder resin is represented by B % by weight based on the weight of the toner, the following relationship is satisfied: 0.1?A/B?70.
    Type: Grant
    Filed: January 13, 2003
    Date of Patent: February 15, 2005
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasushi Katsuta, Manabu Ohno, Masanori Ito, Emi Tosaka
  • Patent number: 6806016
    Abstract: A toner suitable for use in electrophotography, etc., is composed of toner particles each containing a binder resin, a colorant and a wax component. The toner has a number-average particle size of 2-6 &mgr;m and a standard deviation in particle size of below 2.6 &mgr;m based on a number-basis distribution of circle-equivalent diameters, an average circularity of 0.970-0.995 and a standard deviation in circularity of below 0.030 based on a circularity frequency distribution, and a residual monomer content of at most 500 ppm. The toner particles have such a microtexture as to provide a particle cross section as observed through a transmission electron microscope (TEM) exhibiting a matrix of the binder resin and a particle of the wax dispersed in a discrete form in the matrix of the binder resin.
    Type: Grant
    Filed: January 29, 2003
    Date of Patent: October 19, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Manabu Ohno, Satoshi Yoshida, Satoshi Handa, Akira Hashimoto, Keiji Komoto
  • Publication number: 20040191661
    Abstract: The toner having a significantly improved dispersibility of a colorant in toner particles is provided. The present invention provides a dry toner comprising: (i) a binder resin; (ii) a colorant; (iii) at least one of metallophthalocyanine and a metallophthalocyanine derivative having a central metal selected from the group consisting of Cr, Fe, Co, Ni, Zn, Mn, Mg, and Al; and (iv) a polymer containing 0.5 to 20% by mass of a base unit derived from a specific polymerizable monomer having an amide group.
    Type: Application
    Filed: March 10, 2004
    Publication date: September 30, 2004
    Inventors: Manabu Ohno, Motoya Fukushima, Hitoshi Itabashi, Yasushi Katsuta, Emi Tosaka, Norikazu Fujimoto
  • Patent number: 6667140
    Abstract: A color toner (magenta toner) showing not only color image forming performances such as color reproducibility, gradation characteristic, light-fastness, full-color image forming characteristic and a chargeability but also excellent in matching with various members of an electrophotographic apparatus is produced from a binder resin, a wax component and a specific monoazo pigment composition. The monoazo pigment composition is characterized by a principal monoazo pigment of a specific structure and specified amounts of a &bgr;-naphthol derivative and an aromatic amine, usable as materials for synthesizing the monoazo pigment.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: December 23, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Emi Tosaka, Motoya Fukushima, Manabu Ohno, Yasushi Katsuta
  • Publication number: 20030186152
    Abstract: A toner suitable for use in electrophotography, etc., is composed of toner particles each containing a binder resin, a colorant and a wax component. The toner has a number-average particle size of 2-6 &mgr;m and a standard deviation in particle size of below 2.6 based on a number-basis distribution of circle-equivalent diameters, an average circularity of 0.970-0.995 and a standard deviation in circularity of below 0.030 based on a circularity frequency distribution, and a residual monomer content of at most 500 ppm. The toner particles have such a microtexture as to provide a particle cross section as observed through a transmission electron microscope (TEM) exhibiting a matrix of the binder resin and a particle of the wax dispersed in a discrete form in the matrix of the binder resin.
    Type: Application
    Filed: January 29, 2003
    Publication date: October 2, 2003
    Inventors: Manabu Ohno, Satoshi Yoshida, Satoshi Handa, Akira Hashimoto, Keiji Komoto
  • Publication number: 20030162116
    Abstract: A toner contains at least a binder resin, a colorant, a compound (A) and a compound (B) in which the compound (A) is selected from the specific compound group and the compound (B) is a derivative of any one of the compounds included in the group from which the compound (A) is selected. The total content A of the compound (A) and compound (B) in the toner is from 0.2% to 6% by weight based on the weight of the toner, and where the content of the cross-linking agent component in the binder resin is represented by B % by weight based on the weight of the toner, the following relationship is satisfied: 0.1≦A/B≦70.
    Type: Application
    Filed: January 13, 2003
    Publication date: August 28, 2003
    Inventors: Yasushi Katsuta, Manabu Ohno, Masanori Ito, Emi Tosaka
  • Patent number: 6610454
    Abstract: A toner is comprised of a binder resin, a colorant and a wax. The binder resin has a polycarbonate resin in an amount of from 0.1% by weight to 50.0% by weight and a resin other than the polycarbonate resin in an amount of from 50.0% by weight to 99.9% by weight, based on the weight of the binder resin. In molecular weight distribution as measured by gel permeation chromatography of tetrahydrofuran-soluble matter, the toner contains in an amount of 15.0% by weight or less based on the weight of the toner a component which has in its structure a repeating unit of the polycarbonate resin and is contained in components having a molecular weight of 1,000 or less.
    Type: Grant
    Filed: September 3, 1998
    Date of Patent: August 26, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Hashimoto, Tsutomu Kukimoto, Manabu Ohno, Tsuyoshi Takiguchi, Yasukazu Ayaki, Satoshi Handa, Masanori Ito, Keiji Komoto
  • Patent number: 6528224
    Abstract: A toner suitable for use in electrophotography, etc., is composed of toner particles each containing a binder resin, a colorant and a wax component. The toner has a number-average particle size of 2-6 &mgr;m and a standard deviation in particle size of below 2.6 &mgr;m based on a number-basis distribution of circle-equivalent diameters, an average circularity of 0.970-0.995 and a standard deviation in circularity of below 0.030 based on a circularity frequency distribution, and a residual monomer content of at most 500 ppm. The toner particles have such a microtexture as to provide a particle cross section as observed through a transmission electron microscope (TEM) exhibiting a matrix of the binder resin and a particle of the wax dispersed in a discrete form in the matrix of the binder resin.
    Type: Grant
    Filed: March 30, 1999
    Date of Patent: March 4, 2003
    Inventors: Manabu Ohno, Satoshi Yoshida, Satoshi Handa, Akira Hashimoto, Keiji Komoto
  • Patent number: 6447970
    Abstract: A toner contains at least a binder resin, a colorant, a wax and an aluminum compound, wherein the binder resin has an acid value of 1 to 40 mgKOH/g; the binder resin contains 2% to 50% by weight of tetrahydrofuran (THF) based on the weight of the binder resin; a tetrahydrofuran-soluble matter of the binder resin has a main peak in a molecular weight range of from 2,000 to 30,000 in a chromatogram by gel permeation chromatography (GPC); and the aluminum compound is a specific aluminum compound of substituted or unsubstituted benzilic acid.
    Type: Grant
    Filed: June 7, 2000
    Date of Patent: September 10, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventors: Satoshi Matsunaga, Manabu Ohno, Koji Inaba, Satoshi Handa, Ryota Kashiwabara
  • Patent number: 6447968
    Abstract: A magnetic toner for developing an electrostatic latent image has magnetic toner particles containing at least a binder resin, a magnetic powder and a wax component. The magnetic powder has magnetic iron oxide particles the particle surfaces of which have been coat-treated with an organic surface modifying agent. The magnetic iron oxide particles contain silicon element (Si) in an amount of from 0.4 to 2.0% by weight based on the weight of iron element (Fe) and the magnetic iron oxide particles have an Fe/Si atomic ratio of from 1.0 to 4.0 at their outermost surfaces. The magnetic toner particles have shape factors SF-1 and SF-2 as measured by an image analyzer, with a value of SF-1 of from 100 to 160, a value of SF-2 of from 100 to 140 and a value of (SF-2)/(SF-1) of not more than 1.0.
    Type: Grant
    Filed: December 29, 1997
    Date of Patent: September 10, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventor: Manabu Ohno
  • Publication number: 20020058193
    Abstract: A color toner (magenta toner) showing not only color image forming performances such as color reproducibility, gradation characteristic, light-fastness, full-color image forming characteristic and a chargeability but also excellent in matching with various members of an electrophotographic apparatus is produced from a binder resin, a wax component and a specific monoazo pigment composition. The monoazo pigment composition is characterized by a principal monoazo pigment of a specific structure and specified amounts of a &bgr;-naphthol derivative and an aromatic amine, usable as materials for synthesizing the monoazo pigment.
    Type: Application
    Filed: August 31, 2001
    Publication date: May 16, 2002
    Inventors: Emi Tosaka, Motoya Fukushima, Manabu Ohno, Yasushi Katsuta
  • Patent number: 6365314
    Abstract: A toner for developing electrostatic images. having a uniform composition and uniform performances over varying sizes of toner particles is constituted by (a) a binder resin, (b) a long-chain alkyl compound and (c) a specific azo-type iron complex. The long-chain alkyl compound is represented by the following formula (1), (2) or (3): CH3&Parenopenst;CH2&Parenclosest;xCH2OH  (1),  CH3&Parenopenst;CH2&Parenclosest;yCH2COOH (3), wherein x and y independently denote an average value in the range of 35-150.
    Type: Grant
    Filed: December 9, 1999
    Date of Patent: April 2, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventors: Koichi Tomiyama, Takaaki Kohtaki, Manabu Ohno, Makoto Unno, Yushi Mikuriya, Nobuyuki Okubo, Tadashi Doujo, Shunji Suzuki
  • Publication number: 20020022188
    Abstract: A toner is comprised of a binder resin, a colorant and a wax. The binder resin has a polycarbonate resin in an amount of from 0.1% by weight to 50.0% by weight and a resin other than the polycarbonate resin in an amount of from 50.0% by weight to 99.9% by weight, based on the weight of the binder resin. In molecular weight distribution as measured by gel permeation chromatography of tetrahydrofuran-soluble matter, the toner contains in an amount of 15.0% by weight or less based on the weight of the toner a component which has in its structure a repeating unit of the polycarbonate resin and is contained in components having a molecular weight of 1,000 or less.
    Type: Application
    Filed: September 3, 1998
    Publication date: February 21, 2002
    Inventors: AKIRA HASHIMOTO, TSUTOMU KUKIMOTO, MANABU OHNO, TSUYOSHI TAKIGUCHI, YSUKAZU AYAKI, SATOSHI HANDA, MASANORI ITO, KEIJI KOMOTO
  • Patent number: 6346356
    Abstract: A toner is comprised of toner particles containing at least a binder resin, a colorant, a wax component and an oxycarboxylic acid. The toner satisfies the following conditions: 1.05≦A/B≦3.00, and 0.15≦B≦3.50 wherein A (mg) is a weight of oxycarboxylic acid extracted with methanol from 1 g of the toner, and B (mg) is a weight of oxycarboxylic acid extracted with an aqueous 0.1 mol/liter sodium hydroxide solution from 1 g of the toner.
    Type: Grant
    Filed: May 17, 2000
    Date of Patent: February 12, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventors: Manabu Ohno, Toshiyuki Ugai, Ryoichi Fujita, Shinya Yachi, Yasushi Katsuta, Kenichi Nakayama
  • Patent number: 6337169
    Abstract: A toner suitable for use in electrophotography, etc., is composed of toner particles each containing a binder resin, a colorant and a wax component. Each toner particle has such a microtexture as to provide a cross section as observed through a transmission electron microscope (TEM) exhibiting a matrix of the binder resin, a particle of the wax enclosed with the matrix; and the binder resin dispersed in a particulate form in the wax particle, and the toner particles have a residual monomer content of at most 500 ppm by weight of the toner particles. The colorant may also be dispersed in the wax particle enclosed within the matrix of the binder resin.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: January 8, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Hashimoto, Satoshi Yoshida, Manabu Ohno, Yasukazu Ayaki, Satoshi Handa, Keiji Komoto