Patents by Inventor Masayoshi Kato
Masayoshi Kato 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: 8697327Abstract: A process for producing a core-shell toner is provided in which the toner has core particles containing at least a binder resin (1), a colorant and a release agent and shell layers which contain at least a resin (2) and with which the core particles are covered; and the process including the steps of (A) mixing a binder resin-(1) dispersion, a colorant dispersion and a release agent dispersion, (B) adding to a mixed dispersion thus obtained an agglomerating agent to effect agglomeration, (C) adding to core agglomerated particles thus formed a mixture prepared by mixing the resin-(2) dispersion and a metal salt to make the resin (2) adhere to the surfaces of the core agglomerated particles, and (D) heating core-shell agglomerated particles thus formed to a temperature not lower than the glass transition temperatures of the binder resin (1) and resin (2) to effect fusion thereof.Type: GrantFiled: May 19, 2010Date of Patent: April 15, 2014Assignee: Canon Kabushiki KaishaInventors: Takaho Shibata, Masayoshi Kato, Ryuji Higashi, Takayuki Toyoda, Ryo Natori, Yuya Chimoto
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Patent number: 8282532Abstract: A vehicle drive apparatus for supplying oil pressure to a hydraulic servo at restart of an engine. The vehicle drive apparatus includes an accumulator that accumulates the oil pressure, an electromagnetic switching valve that retains oil pressure of the accumulator when an oil pump is stopped, a switching valve control unit that controls opening and closing of the electromagnetic switching valve, and a restart determining unit that determines whether or not to restart the vehicle drive source from a stopped state. When it is determined by the restart determining unit to restart the vehicle drive source, the switching valve control unit is started so as to supply the oil pressure accumulated in the accumulator to the hydraulic servo. As a result, engine friction engagement elements are quickly engaged to enable starting of a vehicle.Type: GrantFiled: December 14, 2009Date of Patent: October 9, 2012Assignee: Aisin AW Co., Ltd.Inventors: Haruki Shirasaka, Noriyuki Tani, Yuji Iwatsuru, Masayoshi Kato, Takuji Akiyama, Shuichi Takeda, Masahiro Ito
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Patent number: 8211606Abstract: A coloring compound is provided which is excellent in coloring ability and transparency, has high solubility in organic solvents, and is superior in light resistance. A toner, a sheet for heat-sensitive transfer recording and an ink that use the coloring compound are also provided.Type: GrantFiled: July 25, 2008Date of Patent: July 3, 2012Assignee: Canon Kabushiki KaishaInventors: Yasuaki Murai, Masashi Hirose, Masayoshi Kato, Takayuki Toyoda, Takeshi Miyazaki
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Patent number: 8210978Abstract: A vehicle drive unit includes a clutch pressure control valve that controls hydraulic pressure for operating the clutch; a clutch control valve that is provided in a first oil passage between the clutch pressure control valve and the clutch, and that controls hydraulic pressure in an engagement state between full engagement and disengagement of the clutch; a second oil passage that bypasses the clutch control valve and that is arranged parallel to the first oil passage; and a shift valve that connects, to an oil passage connected to the clutch, the first oil passage when controlling the engagement state between full engagement and disengagement of the clutch, and the second oil passage when not controlling the engagement state between full engagement and disengagement of the clutch.Type: GrantFiled: November 30, 2009Date of Patent: July 3, 2012Assignee: Aisin AW Co., Ltd.Inventors: Haruki Shirasaka, Yuji Iwatsuru, Noriyuki Tani, Masayoshi Kato
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Publication number: 20120040285Abstract: A process for producing a core-shell toner is provided in which the toner has core particles containing at least a binder resin (1), a colorant and a release agent and shell layers which contain at least a resin (2) and with which the core particles are covered; and the process including the steps of (A) mixing a binder resin-(1) dispersion, a colorant dispersion and a release agent dispersion, (B) adding to a mixed dispersion thus obtained an agglomerating agent to effect agglomeration, (C) adding to core agglomerated particles thus formed a mixture prepared by mixing the resin-(2) dispersion and a metal salt to make the resin (2) adhere to the surfaces of the core agglomerated particles, and (D) heating core-shell agglomerated particles thus formed to a temperature not lower than the glass transition temperatures of the binder resin (1) and resin (2) to effect fusion thereof.Type: ApplicationFiled: May 19, 2010Publication date: February 16, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Takaho Shibata, Masayoshi Kato, Ryuji Higashi, Takayuki Toyoda, Ryo Natori, Yuya Chimoto
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Patent number: 7833685Abstract: Provided are a coloring compound for color toner which satisfies all of solubility in an organic solvent, a color tone, and lightfastness, and does not inhibit the polymerization of a polymerizable monomer when used in a polymerized toner, and a yellow toner using the coloring compound and achieving compatibility between a good color tone and excellent lightfastness, in which, the coloring compound has a structure represented by the following formula (1).Type: GrantFiled: May 13, 2008Date of Patent: November 16, 2010Assignee: Canon Kabushiki KaishaInventors: Masatake Tanaka, Yasuaki Murai, Masayoshi Kato, Takayuki Toyoda, Takeshi Miyazaki
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Patent number: 7833687Abstract: The present invention provides an aqueous dispersion of nonspherical fine resin particles having excellent storage stability and processability such as aggregation and adherence to other substances, a method for producing the aqueous dispersion of fine resin particles, and a method for producing toner particles using the aqueous dispersion of fine resin particles. The present invention relates to an aqueous dispersion of fine resin particles characterized in that the fine resin particles are nonspherical particles with an average minor axis being 0.02 ?m or more and 1.00 ?m or less and an average ratio of a major axis to a minor axis being 2.0 or more and 5.0 or less, a method for producing the aqueous dispersion of fine resin particles, and a method for producing toner particles using the aqueous dispersion of fine resin particles.Type: GrantFiled: October 6, 2009Date of Patent: November 16, 2010Assignee: Canon Kabushiki KaishaInventors: Masayoshi Kato, Takayuki Toyoda, Ryuji Higashi, Ryo Natori, Takaho Shibata, Yuya Chimoto, Takeshi Miyazaki
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Publication number: 20100167874Abstract: A vehicle drive unit includes a clutch pressure control valve that controls hydraulic pressure for operating the clutch; a clutch control valve that is provided in a first oil passage between the clutch pressure control valve and the clutch, and that controls hydraulic pressure in an engagement state between full engagement and disengagement of the clutch; a second oil passage that bypasses the clutch control valve and that is arranged parallel to the first oil passage; and a shift valve that connects, to an oil passage connected to the clutch, the first oil passage when controlling the engagement state between full engagement and disengagement of the clutch, and the second oil passage when not controlling the engagement state between full engagement and disengagement of the clutch.Type: ApplicationFiled: November 30, 2009Publication date: July 1, 2010Applicant: AISIN AW CO., LTD.Inventors: Haruki SHIRASAKA, Yuji IWATSURU, Noriyuki TANI, Masayoshi KATO
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Publication number: 20100167872Abstract: A vehicle drive apparatus for supplying oil pressure to a hydraulic servo at restart of an engine. The vehicle drive apparatus includes an accumulator that accumulates the oil pressure, an electromagnetic switching valve that retains oil pressure of the accumulator when an oil pump is stopped, a switching valve control unit that controls opening and closing of the electromagnetic switching valve, and a restart determining unit that determines whether or not to restart the vehicle drive source from a stopped state. When it is determined by the restart determining unit to restart the vehicle drive source, the switching valve control unit is started so as to supply the oil pressure accumulated in the accumulator to the hydraulic servo. As a result, engine friction engagement elements are quickly engaged to enable starting of a vehicle.Type: ApplicationFiled: December 14, 2009Publication date: July 1, 2010Applicant: AISIN AW CO., LTD.Inventors: Haruki SHIRASAKA, Noriyuki Tani, Yuji Iwatsuru, Masayoshi Kato, Takuji Akiyama, Shuichi Takeda, Masahiro Ito
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Publication number: 20100035171Abstract: Provided is a yellow toner having toner particles each containing at least a binder resin, a colorant, and a polar resin, the yellow toner being characterized in that: the colorant is a coloring compound having a specific structure; in a microscopic compression test at a measurement temperature of 25° C., the toner has a recovery ratio Z(25) of 40 to 80%; and the toner has a glass transition temperature (TgA) measured with a differential scanning calorimeter (DSC) of 40° C. to 60° C. and a temperature (P1) of the highest endothermic peak measured with the DSC of 70° C. to 90° C., and the temperature (P1) of the highest endothermic peak and the glass transition temperature (TgA) satisfy the relationship of 15° C.?P1?TgA?50° C.Type: ApplicationFiled: June 15, 2009Publication date: February 11, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Shuntaro Watanabe, Yuji Moriki, Ken-ichi Nakayama, Koji Inaba, Masayoshi Kato, Masatake Tanaka, Takayuki Toyoda
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Publication number: 20100028794Abstract: The present invention provides an aqueous dispersion of nonspherical fine resin particles having excellent storage stability and processability such as aggregation and adherence to other substances, a method for producing the aqueous dispersion of fine resin particles, and a method for producing toner particles using the aqueous dispersion of fine resin particles. The present invention relates to an aqueous dispersion of fine resin particles characterized in that the fine resin particles are nonspherical particles with an average minor axis being 0.02 ?m or more and 1.00 ?m or less and an average ratio of a major axis to a minor axis being 2.0 or more and 5.0 or less, a method for producing the aqueous dispersion of fine resin particles, and a method for producing toner particles using the aqueous dispersion of fine resin particles.Type: ApplicationFiled: October 6, 2009Publication date: February 4, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Masayoshi Kato, Takayuki Toyoda, Ryuji Higashi, Ryo Natori, Takaho Shibata, Yuya Chimoto, Takeshi Miyazaki
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Publication number: 20090075193Abstract: A coloring compound is provided which is excellent in coloring ability and transparency, has high solubility in organic solvents, and is superior in light resistance. A toner, a sheet for heat-sensitive transfer recording and an ink that use the coloring compound are also provided.Type: ApplicationFiled: July 25, 2008Publication date: March 19, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Yasuaki Murai, Masashi Hirose, Masayoshi Kato, Takayuki Toyoda, Takeshi Miyazaki
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Publication number: 20080299482Abstract: A method of manufacturing an aqueous dispersion of resin fine particles, including: a mixing step of mixing an aqueous medium, a resin having an acid group, a basic substance, and a surfactant to obtain a mixture; an emulsification step of applying a shearing force to the mixture while heating at temperature 10.0° C. or more higher than a softening temperature (Tm) of the resin having the acid group to obtain an emulsified product; and a cooling step of obtaining an aqueous dispersion of resin fine particles by cooling the emulsified product, in which, in the cooling step, cooling is carried out at a cooling rate of 0.5° C./min or more to 10.0° C./min or less to a glass transition temperature (Tg) of the resin having the acid group or lower while a shearing force is applied.Type: ApplicationFiled: July 24, 2008Publication date: December 4, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Masayoshi Kato, Takayuki Toyoda, Takeshi Miyazaki
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Publication number: 20080220358Abstract: Provided are a coloring compound for color toner which satisfies all of solubility in an organic solvent, a color tone, and lightfastness, and does not inhibit the polymerization of a polymerizable monomer when used in a polymerized toner, and a yellow toner using the coloring compound and achieving compatibility between a good color tone and excellent lightfastness, in which, the coloring compound has a structure represented by the following formula (1).Type: ApplicationFiled: May 13, 2008Publication date: September 11, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Masatake Tanaka, Yasuaki Murai, Masayoshi Kato, Takayuki Toyoda, Takeshi Miyazaki
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Patent number: 7288357Abstract: A cyan toner is provided which is brighter and more greenish in hue than conventional cyan toners and highly translucency.Type: GrantFiled: November 30, 2006Date of Patent: October 30, 2007Assignee: Canon Kabushiki KaishaInventors: Takayuki Toyoda, Yasuaki Murai, Masayoshi Kato, Norikazu Fujimoto, Takeshi Miyazaki
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Patent number: 7264910Abstract: A cyan toner is provided which is brighter and more greenish in hue than conventional cyan toners and highly translucency.Type: GrantFiled: May 15, 2006Date of Patent: September 4, 2007Assignee: Canon Kabushiki KaishaInventors: Takayuki Toyoda, Yasuaki Murai, Masayoshi Kato, Norikazu Fujimoto, Takeshi Miyazaki
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Publication number: 20070117036Abstract: A cyan toner is provided which is brighter and more greenish in hue than conventional cyan toners and highly translucency.Type: ApplicationFiled: November 30, 2006Publication date: May 24, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Takayuki Toyoda, Yasuaki Murai, Masayoshi Kato, Norikazu Fujimoto, Takeshi Miyazaki
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Publication number: 20060234149Abstract: A cyan toner is provided which is brighter and more greenish in hue than conventional cyan toners and highly translucency.Type: ApplicationFiled: May 15, 2006Publication date: October 19, 2006Applicant: CANON KABUSHIKI KAISHAInventors: Takayuki Toyoda, Yasuaki Murai, Masayoshi Kato, Norikazu Fujimoto, Takeshi Miyazaki
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Patent number: 6207339Abstract: A process for producing a toner has the steps of, polymerizing a polymerizable monomer composition containing at least a polymerizable monomer and a colorant, in an aqueous dispersion medium to form colored polymer particles, and thereafter washing the colored polymer particles, followed by dewatering to prepare wet colored polymer particles, subjecting the resultant wet colored polymer particles to substantial removal of the water held by the wet colored polymer particles, by means of a dryer making use of hot air to obtain toner particles, and drying the toner particles under reduced pressure by means of a vacuum dryer so that polymerizable monomers remaining in the toner particles come to be in a residue of 200 ppm or less.Type: GrantFiled: August 19, 1999Date of Patent: March 27, 2001Assignee: Canon Kabushiki KaishaInventors: Masayoshi Kato, Hitoshi Kanda, Tatsuya Nakamura
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Patent number: D425635Type: GrantFiled: November 8, 1999Date of Patent: May 23, 2000Assignee: Matsushita Electronic CorporationInventors: Masayoshi Kato, Takeshi Matsumura, Shiro Iida