Patents by Inventor Emi Tosaka
Emi Tosaka 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: 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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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: 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
-
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
-
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
-
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
-
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: 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
-
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
-
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
-
Patent number: 7029813Abstract: In a toner having toner particles containing at least a colorant, a release agent and a polar resin, and an inorganic fine powder, the polar resin contains a polyester resin obtained by carrying out polymerization in the presence of a titanium chelate compound as a catalyst, and has an acid value in a specific range. The toner particles are granulated in an aqueous medium and have a weight-average particle diameter in a specific range.Type: GrantFiled: November 21, 2003Date of Patent: April 18, 2006Assignee: Canon Kabushiki KaishaInventors: Yushi Mikuriya, Yasushi Katsuta, Keiji Komoto, Takeshi Kaburagi, Emi Tosaka
-
Publication number: 20060063082Abstract: 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: ApplicationFiled: June 22, 2005Publication date: March 23, 2006Applicant: CANON KABUSHIKI KAISHAInventors: Yushi Mikuriya, Satoshi Handa, Yuji Moriki, Yasushi Katsuta, Emi Tosaka