Patents by Inventor Yushi Mikuriya
Yushi Mikuriya 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: 8247147Abstract: A toner including toner particles containing at least a binder resin and a colorant. The binder resin is a vinyl-based resin. The toner contains a THF insoluble matter in a quantity of 0.0 mass % or more to less than 16.0 mass %. The toner has a main peak in a molecular weight domain Dr1 ranging from 5,000 to 80,000 in measurement of THF soluble matter of the toner with a gel permeation chromatogram (GPC)-differential refractive index detector (RI), and the toner has a main peak in a molecular weight domain Dm1 ranging from 10,000 to 120,000 and at least one peak in a molecular weight domain Dm2 ranging from 300,000 to 7,000,000 in the GPC-RI measurement in measurement with a GPC-multi-angle laser light scattering detector (MALLS).Type: GrantFiled: June 25, 2007Date of Patent: August 21, 2012Assignee: Canon Kabushiki KaishaInventors: Koji Abe, Shinya Yachi, Satoshi Handa, Kazumi Yoshizaki, Emi Tosaka, Yasuhiro Hashimoto, Nobuhisa Abe, Yushi Mikuriya
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Patent number: 8192907Abstract: A toner including toner particles containing at least a binder resin and a colorant. The binder resin is a vinyl-based resin. The toner contains a THF insoluble matter in a quantity of 0.0 mass % or more to less than 16.0 mass %. The toner has a main peak in a molecular weight domain Dr1 ranging from 5,000 to 80,000 in measurement of THF soluble matter of the toner with a gel permeation chromatogram (GPC)-differential refractive index detector (RI), and the toner has a main peak in a molecular weight domain Dm1 ranging from 10,000 to 120,000 and at least one peak in a molecular weight domain Dm2 ranging from 300,000 to 7,000,000 in the GPC-RI measurement in measurement with a GPC-multi-angle laser light scattering detector (MALLS).Type: GrantFiled: June 25, 2007Date of Patent: June 5, 2012Assignee: Canon Kabushiki KaishaInventors: Koji Abe, Shinya Yachi, Satoshi Handa, Kazumi Yoshizaki, Emi Tosaka, Yasuhiro Hashimoto, Nobuhisa Abe, Yushi Mikuriya
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Patent number: 8084178Abstract: A non magnetic toner comprises toner particles each containing at least a binder resin, a colorant and a wax component. The toner further comprises an inorganic fine powder. A storage elastic modulus at 110° C. (G?110) of the non magnetic toner is in a range of 2.00×104 to 2.00×105 dN/m2. A storage elastic modulus at 150° C. (G?150) of the non magnetic toner is in a range of 3.00×103 to 2.00×104 dN/m2. The toner particles are obtained by dispersing a polymerizable monomer composition containing polymerizable monomers, the colorant, the wax component and a low-molecular weight polymer into an aqueous medium, granulating the dispersed polymerizable monomer composition, and polymerizing the polymerizable monomers in granulated particles. The low-molecular weight polymer has a weight average molecular weight (Mw) measured by means of gel permeation chromatography (GPC) in a range of 2000 to 5000.Type: GrantFiled: June 28, 2006Date of Patent: December 27, 2011Assignee: Canon Kabushiki KaishaInventors: Emi Tosaka, Koji Abe, Yushi Mikuriya, Satoshi Handa, Shinya Yachi, Kazumi Yoshizaki, Yasuhiro Hashimoto
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Patent number: 8053156Abstract: In a chart of molecular weight distribution measured of a toner, i) the toner has a main peak in the region of molecular weight of 16,000 to 60,000, and ii) where the molecular weight at the main peak is represented by M1, and where the height at the molecular weight M1 is represented by H(M1), the height at a molecular weight of 4,000 by H(4000) and the height at a molecular weight of 15,000 by H(15000), the H(4000), the H(15000) and the H(M1) satisfy a specific proportion. The toner has a weight-average molecular weight (Mw) of 15,000 to 80,000, and, in an endothermic chart, i) the toner has an endothermic main peak in the range of 40 to 130° C., and ii) the calorimetric integral value represented by the peak area of the endothermic main peak is 10 to 35 J per 1 g of the toner.Type: GrantFiled: November 22, 2005Date of Patent: November 8, 2011Assignee: Canon Kabushiki KaishaInventors: Koji Abe, Satoshi Handa, Shinya Yachi, Kazumi Yoshizaki, Emi Tosaka, Yasuhiro Hashimoto, Yushi Mikuriya, Hitoshi Itabashi
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Patent number: 7537875Abstract: In a toner having toner particles which comprise toner base particles containing at least a colorant, a release agent and a polar resin, and an inorganic fine powder, the polar resin is a resin having at least a polyester unit, synthesized in the presence of an aromatic carboxylic acid titanium compound used as a catalyst, and has an acid value of from 3 mgKOH/g to 35 mgKOH/g. The toner base particles are obtained by carrying out granulation in an aqueous medium, and the toner has a weight-average particle diameter of from 4.0 ?m to 10.0 ?m.Type: GrantFiled: June 22, 2005Date of Patent: May 26, 2009Assignee: Canon Kabushiki KaishaInventors: Yushi Mikuriya, Satoshi Handa, Yuji Moriki, Yasushi Katsuta, Emi Tosaka
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Publication number: 20090087768Abstract: An object of the present invention is to provide a toner excellent in fixing ability and developing ability.Type: ApplicationFiled: June 28, 2006Publication date: April 2, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Emi Tosaka, Koji Abe, Yushi Mikuriya, Satoshi Handa, Shinya Yachi, Kazumi Yoshizaki, Yasuhiro Hashimoto
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Publication number: 20090035688Abstract: In a chart of molecular weight distribution measured of a toner, i) the toner has a main peak in the region of molecular weight of 16,000 to 60,000, and ii) where the molecular weight at the main peak is represented by M1, and where the height at the molecular weight M1 is represented by H(M1), the height at a molecular weight of 4,000 by H(4000) and the height at a molecular weight of 15,000 by H(15000), the H(4000), the H(15000) and the H(M1) satisfy a specific proportion. The toner has a weight-average molecular weight (Mw) of 15,000 to 80,000, and, in an endothermic chart, i) the toner has an endothermic main peak in the range of 40 to 1300C, and ii) the calorimetric integral value represented by the peak area of the endothermic main peak is 10 to 35 J per 1 g of the toner.Type: ApplicationFiled: November 22, 2005Publication date: February 5, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Koji Abe, Satoshi Handa, Shinya Yachi, Kazumi Yoshizaki, Emi Tosaka, Yasuhiro Hashimoto, Yushi Mikuriya, Hitoshi Itabashi
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Patent number: 7459253Abstract: A toner is provided which is excellent in low-temperature fixability and offset resistance, has a wide fixing temperature range, provides fixed images with high gloss, and can form toner images having high quality. The toner is composed of toner particles having toner base particles each containing a binder resin and a colorant. When the viscosities of each of the toner particles measured at 100° C. and 110° C. by a flow tester heat-up method are represented by ?100 (Pa·s) and ?110 (Pa·s), respectively, an average variation in viscosity A?T represented by the following equation (1) satisfies the relationship of 0?A?T??0.064: A?T=(log(?110)?log(?100)/(110?100); and??(1) ?100 is 15,000 to 40,000 Pa·s.Type: GrantFiled: April 25, 2007Date of Patent: December 2, 2008Assignee: Canon Kabushiki KaishaInventors: Koji Abe, Shinya Yachi, Emi Tosaka, Satoshi Handa, Kazumi Yoshizaki, Yasuhiro Hashimoto, Yushi Mikuriya
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Patent number: 7387860Abstract: A toner includes toner particles containing at least a binder resin and a colorant, and inorganic fine particles. The shape factor SF-1 of the toner particles is in a specific range. The toner has a storage elastic modulus at 140° C., G? (140° C.), in a specific range the toner comes to have a viscosity of 1.0×103 Pa·s according to a flow tester heating method at a temperature of from 115° C. or more to less than 130° C.Type: GrantFiled: June 5, 2007Date of Patent: June 17, 2008Assignee: Canon Kabushiki KaishaInventors: Yuji Moriki, Shinya Yachi, Yushi Mikuriya, Keiji Komoto, Kenichi Nakayama, Takeshi Kaburagi, Emi Tosaka
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Publication number: 20070259283Abstract: A toner including toner particles containing at least a binder resin and a colorant. The binder resin is a vinyl-based resin. The toner contains a THF insoluble matter in a quantity of 0.0 mass % or more to less than 16.0 mass %. The toner has a main peak in a molecular weight domain Dr1 ranging from 5,000 to 80,000 in measurement of THF soluble matter of the toner with a gel permeation chromatogram (GPC)-differential refractive index detector (RI), and the toner has a main peak in a molecular weight domain Dm1 ranging from 10,000 to 120,000 and at least one peak in a molecular weight domain Dm2 ranging from 300,000 to 7,000,000 in the GPC-RI measurement in measurement with a GPC-multi-angle laser light scattering detector (MALLS).Type: ApplicationFiled: June 25, 2007Publication date: November 8, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Koji Abe, Shinya Yachi, Satoshi Handa, Kazumi Yoshizaki, Emi Tosaka, Yasuhiro Hashimoto, Nobuhisa Abe, Yushi Mikuriya
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Publication number: 20070231718Abstract: A toner includes toner particles containing at least a binder resin and a colorant, and inorganic fine particles. The shape factor SF-1 of the toner particles is in a specific range. The toner has a storage elastic modulus at 140° C., G? (140° C.), in a specific range the toner comes to have a viscosity of 1.0×103 Pa·s according to a flow tester heating method at a temperature of from 115° C. or more to less than 130° C.Type: ApplicationFiled: June 5, 2007Publication date: October 4, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Yuji Moriki, Shinya Yachi, Yushi Mikuriya, Keiji Komoto, Kenichi Nakayama, Takeshi Kaburagi, Emi Tosaka
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Publication number: 20070212631Abstract: A toner is provided which is excellent in low-temperature fixability and offset resistance, has a wide fixing temperature range, provides fixed images with high gloss, and can form toner images having high quality. The toner is composed of toner particles having toner base particles each containing a binder resin and a colorant. When the viscosities of each of the toner particles measured at 100° C. and 110° C. by a flow tester heat-up method are represented by ?100 (Pa·s) and ?110 (Pa·s), respectively, an average variation in viscosity A?T represented by the following equation (1) satisfies the relationship of 0?A?T??0.064: A?T=(log(?100)?log(?100)/(110?100)??(1); and ?100 is 15,000 to 40,000 Pa·s.Type: ApplicationFiled: April 25, 2007Publication date: September 13, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Koji Abe, Shinya Yachi, Emi Tosaka, Satoshi Handa, Kazumi Yoshizaki, Yasuhiro Hashimoto, Yushi Mikuriya
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Patent number: 7241546Abstract: A toner includes toner particles containing at least a binder resin and a colorant, and inorganic fine particles. The shape factor SF-1 of the toner particles is in a specific range. The toner has a storage elastic modulus at 140° C., G? (140° C.), in a specific range the toner comes to have a viscosity of 1.0×103 Pa·s according to a flow tester heating method at a temperature of from 115° C. or more to less than 130° C.Type: GrantFiled: June 25, 2004Date of Patent: July 10, 2007Assignee: Canon Kabushiki KaishaInventors: Yuji Moriki, Shinya Yachi, Yushi Mikuriya, Keiji Komoto, Kenichi Nakayama, Takeshi Kaburagi, Emi Tosaka
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Patent number: 7160663Abstract: A toner includes toner particles and an inorganic fine powder mixed with the toner particles. The toner particles contain a binder resin, a coloring agent, a releasing agent, and a sulfur-containing resin. The toner particles contain at least one element selected from the group consisting of magnesium, calcium, barium, zinc, aluminum, and phosphorus and satisfy the relationship: 4?T/S?30 wherein T represents the total content of the element in ppm, and S represents the content of sulfur in ppm. The weight-average particle diameter (D4) of the toner is in the range of 3 to 10 ?m. The average circularity of the toner is within the range of 0.950 to 0.995.Type: GrantFiled: March 25, 2004Date of Patent: January 9, 2007Assignee: Canon Kabushiki KaishaInventors: Keiji Komoto, Yasushi Katsuta, Yushi Mikuriya, Takeshi Kaburagi, Emi Tosaka
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Patent number: 7153625Abstract: In a process for producing toner particles by dispersing in an aqueous medium a polymerizable monomer composition containing at least a polymerizable monomer and a colorant and carrying out polymerization by the use of a polymerization initiator, the concentration of alcohol having 4 to 6 carbon atoms in the aqueous medium is so adjusted as to be from 500 ppm to 2,000 ppm when the polymerization conversion of the polymerizable monomer composition is 30%, and to be from 2,300 ppm to 10,000 ppm when the polymerization conversion of the polymerizable monomer composition is 97%.Type: GrantFiled: April 11, 2005Date of Patent: December 26, 2006Assignee: Canon Kabushiki KaishaInventors: Takeshi Kaburagi, Yushi Mikuriya, Keiji Komoto, Yasushi Katsuta, Kenichi Nakayama
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Patent number: 7132207Abstract: In a toner kit having i) a non-magnetic black toner having at least carbon black and ii) color toners, the black toner has a weight-average particle diameter represented by D4b and a one-point method BET specific surface area represented by Sb, and the color toners, other than the-black toner, each have a weight-average particle diameter represented by D4c and a one-point method BET specific surface area represented by Sc, where the black toner and color toners satisfy the following relations (1) and (2): 0.60?D4.c/D4b?0.96,:??Relation (1) 0.750?Sc/Sb?1.000;:??Relation (2) and each have an average circularity of from 0.950 to 1.000 and a circularity standard deviation of less than 0.040 as measured with a flow type particle image analyzer.Type: GrantFiled: December 16, 2005Date of Patent: November 7, 2006Assignee: Canon Kabushiki KaishaInventors: Katsuyuki Nonaka, Yushi Mikuriya, Shinya Yachi, Shuntaro Watanabe
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Patent number: 7112393Abstract: In a non-magnetic toner having non-magnetic toner particles containing at least a binder resin and a colorant, and an inorganic fine powder, the non-magnetic toner particles contain at least one ether compound having a specific structure, and the ether compound is in a content of from 5 ppm to 1,000 ppm.Type: GrantFiled: January 27, 2004Date of Patent: September 26, 2006Assignee: Canon Kabushiki KaishaInventors: Keiji Komoto, Yushi Mikuriya, Yuji Moriki, Yasushi Katsuta, Kenichi Nakayama, Takeshi Kaburagi, Emi Tosaka, Yasuhiro Hashimoto
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Publication number: 20060204876Abstract: In a process for producing toner particles by dispersing in an aqueous medium a polymerizable monomer composition containing at least a polymerizable monomer and a colorant and carrying out polymerization by the use of a polymerization initiator, the concentration of alcohol having 4 to 6 carbon atoms in the aqueous medium is so adjusted as to be from 500 ppm to 2,000 ppm when the polymerization conversion of the polymerizable monomer composition is 30%, and to be from 2,300 ppm to 10,000 ppm when the polymerization conversion of the polymerizable monomer composition is 97%.Type: ApplicationFiled: May 11, 2006Publication date: September 14, 2006Applicant: CANON KABUSHIKI KAISHAInventors: Takeshi Kaburagi, Yushi Mikuriya, Keiji Komoto, Yasushi Katsuta, Kenichi Nakayama
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Patent number: 7067225Abstract: To provide an method for forming an image capable of effectively suppressing a toner from deteriorating and also capable of keeping the quality of an image for a long period of time, even when the method is applied to an apparatus with as high process speed. The prevent invention provides an method for forming an image, in which a developing unit is used, which includes: a rotatable cylindrical toner bearing member having a diameter represented as Rd (mm); and a rotatable cylindrical toner-supplying member having a diameter Rs (mm), the diameters Rd and Rs satisfying the following relational expression (1): 1?Rs?Rd?10??(1) and in which the nonmagnetic one-component toner having an degree of aggregation of 5 to 30% and an electric resistivity of 1×1014 to 1×1018 ?·cm at an electric field of 1×104 V/cm is used.Type: GrantFiled: January 7, 2004Date of Patent: June 27, 2006Assignee: Canon Kabushiki KaishaInventors: Shuntaro Watanabe, Yushi Mikuriya, Takeshi Yamamoto, Shinya Yachi, Katsuyuki Nonaka
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Publication number: 20060093930Abstract: In a toner kit having i) a non-magnetic black toner having at least carbon black and ii) color toners, the black toner has a weight-average particle diameter represented by D4b and a one-point method BET specific surface area represented by Sb, and the color toners, other than the-black toner, each have a weight-average particle diameter represented by D4c and a one-point method BET specific surface area represented by Sc, where the black toner and color toners satisfy the following relations (1) and (2): 0.60?D4.c/D4b?0.96, ??Relation (1): 0.750?Sc/Sb?1.000; ??Relation (2): and each have an average circularity of from 0.950 to 1.000 and a circularity standard deviation of less than 0.040 as measured with a flow type particle image analyzer.Type: ApplicationFiled: December 16, 2005Publication date: May 4, 2006Applicant: Canon Kabushiki KaishaInventors: Katsuyuki Nonaka, Yushi Mikuriya, Shinya Yachi, Shuntaro Watanabe