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: 7323282Abstract: 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: GrantFiled: June 5, 2007Date of Patent: January 29, 2008Assignee: Canon Kabushiki KaishaInventors: Manabu Ohno, Motoya Fukushima, Hitoshi Itabashi, Yasushi Katsuta, Emi Tosaka, Norikazu Fujimoto
-
Publication number: 20070231729Abstract: 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: ApplicationFiled: June 5, 2007Publication date: October 4, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Manabu Ohno, Motoya Fukushima, Hitoshi Itabashi, Yasushi Katsuta, Emi Tosaka, Norikazu Fujimoto
-
Patent number: 7252917Abstract: 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: GrantFiled: March 10, 2004Date of Patent: August 7, 2007Assignee: Canon Kabushiki KaishaInventors: Manabu Ohno, Motoya Fukushima, Hitoshi Itabashi, Yasushi Katsuta, Emi Tosaka, Norikazu Fujimoto
-
Patent number: 7233011Abstract: 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: GrantFiled: April 15, 2005Date of Patent: June 19, 2007Assignee: Fujitsu LimitedInventors: Takashi Maruyama, Manabu Ohno
-
Publication number: 20060033048Abstract: 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: ApplicationFiled: April 15, 2005Publication date: February 16, 2006Applicant: FUJITSU LIMITEDInventors: Takashi Maruyama, Manabu Ohno
-
Patent number: 6855471Abstract: 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: GrantFiled: January 13, 2003Date of Patent: February 15, 2005Assignee: Canon Kabushiki KaishaInventors: Yasushi Katsuta, Manabu Ohno, Masanori Ito, Emi Tosaka
-
Patent number: 6806016Abstract: 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: GrantFiled: January 29, 2003Date of Patent: October 19, 2004Assignee: Canon Kabushiki KaishaInventors: Manabu Ohno, Satoshi Yoshida, Satoshi Handa, Akira Hashimoto, Keiji Komoto
-
Publication number: 20040191661Abstract: 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: ApplicationFiled: March 10, 2004Publication date: September 30, 2004Inventors: Manabu Ohno, Motoya Fukushima, Hitoshi Itabashi, Yasushi Katsuta, Emi Tosaka, Norikazu Fujimoto
-
Patent number: 6667140Abstract: 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: GrantFiled: August 31, 2001Date of Patent: December 23, 2003Assignee: Canon Kabushiki KaishaInventors: Emi Tosaka, Motoya Fukushima, Manabu Ohno, Yasushi Katsuta
-
Publication number: 20030186152Abstract: 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: ApplicationFiled: January 29, 2003Publication date: October 2, 2003Inventors: Manabu Ohno, Satoshi Yoshida, Satoshi Handa, Akira Hashimoto, Keiji Komoto
-
Publication number: 20030162116Abstract: 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: ApplicationFiled: January 13, 2003Publication date: August 28, 2003Inventors: Yasushi Katsuta, Manabu Ohno, Masanori Ito, Emi Tosaka
-
Patent number: 6610454Abstract: 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: GrantFiled: September 3, 1998Date of Patent: August 26, 2003Assignee: Canon Kabushiki KaishaInventors: Akira Hashimoto, Tsutomu Kukimoto, Manabu Ohno, Tsuyoshi Takiguchi, Yasukazu Ayaki, Satoshi Handa, Masanori Ito, Keiji Komoto
-
Patent number: 6528224Abstract: 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: GrantFiled: March 30, 1999Date of Patent: March 4, 2003Inventors: Manabu Ohno, Satoshi Yoshida, Satoshi Handa, Akira Hashimoto, Keiji Komoto
-
Patent number: 6447970Abstract: 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: GrantFiled: June 7, 2000Date of Patent: September 10, 2002Assignee: Canon Kabushiki KaishaInventors: Satoshi Matsunaga, Manabu Ohno, Koji Inaba, Satoshi Handa, Ryota Kashiwabara
-
Patent number: 6447968Abstract: 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: GrantFiled: December 29, 1997Date of Patent: September 10, 2002Assignee: Canon Kabushiki KaishaInventor: Manabu Ohno
-
Publication number: 20020058193Abstract: 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: ApplicationFiled: August 31, 2001Publication date: May 16, 2002Inventors: Emi Tosaka, Motoya Fukushima, Manabu Ohno, Yasushi Katsuta
-
Patent number: 6365314Abstract: 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: GrantFiled: December 9, 1999Date of Patent: April 2, 2002Assignee: Canon Kabushiki KaishaInventors: Koichi Tomiyama, Takaaki Kohtaki, Manabu Ohno, Makoto Unno, Yushi Mikuriya, Nobuyuki Okubo, Tadashi Doujo, Shunji Suzuki
-
Publication number: 20020022188Abstract: 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: ApplicationFiled: September 3, 1998Publication date: February 21, 2002Inventors: AKIRA HASHIMOTO, TSUTOMU KUKIMOTO, MANABU OHNO, TSUYOSHI TAKIGUCHI, YSUKAZU AYAKI, SATOSHI HANDA, MASANORI ITO, KEIJI KOMOTO
-
Patent number: 6346356Abstract: 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: GrantFiled: May 17, 2000Date of Patent: February 12, 2002Assignee: Canon Kabushiki KaishaInventors: Manabu Ohno, Toshiyuki Ugai, Ryoichi Fujita, Shinya Yachi, Yasushi Katsuta, Kenichi Nakayama
-
Patent number: 6337169Abstract: 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: GrantFiled: June 29, 2000Date of Patent: January 8, 2002Assignee: Canon Kabushiki KaishaInventors: Akira Hashimoto, Satoshi Yoshida, Manabu Ohno, Yasukazu Ayaki, Satoshi Handa, Keiji Komoto