Patents by Inventor Hiroshi Nagasawa
Hiroshi Nagasawa 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: 8748073Abstract: A toner comprising a modified polyester resin containing a structure represented by Formula (1a) or (1b), wherein, in Formula (1a) and (1b), R1 represents a hydrogen atom, a methyl group, or an ethyl group, R2 represents an aliphatic hydrocarbon which may be branched, or an aromatic hydrocarbon, and R3 represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a phenyl group.Type: GrantFiled: August 9, 2013Date of Patent: June 10, 2014Assignee: Konica Minolta Business Technologies, Inc.Inventors: Hiroshi Nagasawa, Ken Ohmura
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Patent number: 8741523Abstract: A toner for developing electrostatic image comprising a toner particle containing a binding resin is disclosed. which, and In the toner the binding resin has a domain-matrix structure composed of a high elastic resin composing a domain and a low elastic resin composing a matrix, an arithmetic mean value of ratio (L/W) of the Length L to Width W of the domains is 1.5 to 5.0, domains having Length L in the range of 60 to 500 nm exist 80 number % or more, and domains having Width Win the range of 45 to 100 nm exist 80 number % or more, in a viscoelastic image of a cross section of the toner particle observed via an atomic force microscope.Type: GrantFiled: April 7, 2011Date of Patent: June 3, 2014Assignee: Konica Minolta Business Technologies, Inc.Inventors: Anju Hori, Noboru Ueda, Hiroshi Nagasawa
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Patent number: 8628901Abstract: Disclosed is a toner for electrostatic image development that has sufficient low-temperature fixability, can provide high post-fixing separability, and can be used for stable formation of images at high speed. The toner for electrostatic image development includes toner particles containing a binder resin. The binder resin contains as a part thereof a block copolymer having an A-B-A block copolymer structure including polymer blocks A composed of a structural unit derived from an alkyl methacrylate and a polymer block B composed of a structural unit derived from an alkyl acrylate. The glass transition point (TgA) of a homopolymer of the alkyl methacrylate forming the polymer blocks A is higher than the glass transition point (TgB) of a homopolymer of the alkyl acrylate forming the polymer block B.Type: GrantFiled: October 23, 2012Date of Patent: January 14, 2014Assignee: Konica Minolta Business Technologies, Inc.Inventors: Takaki Kawamura, Hiroyuki Konno, Kouji Sugama, Hiroshi Nagasawa
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Publication number: 20130323639Abstract: A toner comprising a modified polyester resin containing a structure represented by Formula (1a) or (1b), wherein, in Formula (1a) and (1b), R1 represents a hydrogen atom, a methyl group, or an ethyl group, R2 represents an aliphatic hydrocarbon which may be branched, or an aromatic hydrocarbon, and R3 represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a phenyl group.Type: ApplicationFiled: August 9, 2013Publication date: December 5, 2013Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Hiroshi NAGASAWA, Ken OHMURA
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Publication number: 20130280650Abstract: There is provided a toner for electrostatic-image development that can obtain low-temperature fixing property, heat-resistant storability and long-term stability of charging while having excellent low-temperature fixing property. A toner for electrostatic-image development is formed with toner particles containing a binder resin and a crystalline ester compound, the crystalline ester compound has a linear-chain structure, and the binder resin contains a styrene-acrylic resin including a structural unit derived from an acrylic ester monomer represented by general formula (1) below. Meanwhile, in the general formula (1), R1 represents a hydrogen atom or a methyl group, and R2 represents a hydrogen atom, an alkyl group having 1 to 16 carbon atoms or an aryl group having 6 to 15 carbon atoms. m represents 2 or 3, and n represents an integer of 1 to 25.Type: ApplicationFiled: April 22, 2013Publication date: October 24, 2013Applicant: KONICA MINOLTA, INC.Inventors: Kouji SUGAMA, Hiroshi NAGASAWA, Hiroyuki KONNO, Takako KAWAMURA
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Publication number: 20130280649Abstract: There is provided a toner for electrostatic-image development that can obtain heat-resistant storability, fixed image strength and long-term stability of charging while having excellent low-temperature fixing property. The toner is formed with toner particles containing a binder resin and a crystalline ester compound, and the binder resin contains a styrene-acrylic resin including a structural unit derived from an acrylic ester monomer.Type: ApplicationFiled: April 17, 2013Publication date: October 24, 2013Inventors: Hiroshi NAGASAWA, Kouji SUGAMA, Hiroyuki KONNO, Takaki KAWAMURA
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Patent number: 8557492Abstract: In the present invention, provided is a toner suitable for fixing at low temperature, which exhibits excellent performance against thermal stress as well as mechanical stress with no generation of blocking even during storage for a long duration in an unused state, and also with no generation of tacking of toner images after fixing. Also disclosed is a toner comprising at least a binder resin, a colorant and a wax, the toner comprising a fatty acid ester wax comprising a hydroxyl group, and an aliphatic alcohol.Type: GrantFiled: September 11, 2009Date of Patent: October 15, 2013Assignee: Konica Minolta Business Technologies, Inc.Inventors: Kenji Hayashi, Mikio Kouyama, Hiroaki Obata, Noriyuki Kimpara, Hiroshi Nagasawa
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Publication number: 20130209930Abstract: Disclosed is a toner for electrostatic image development, having excellent low-temperature fixability and also having hot offset resistance and post-fixing separability. The toner for electrostatic image development includes toner particles containing a releasing agent and a binder resin, and the binder resin contains a copolymer including a structural unit derived from a monomer represented by the general formula (1). In the general formula (1), R1 represents a hydrogen atom or a methyl group, and R2 represents a hydrogen atom, an alkyl group having 1 to 16 carbon atoms, or an aryl group having 6 to 15 carbon atoms. m is an integer of 2 or 3, and n is an integer of 1 to 8.Type: ApplicationFiled: February 12, 2013Publication date: August 15, 2013Applicant: Konica Minolta Business Technologies IncInventors: Takaki KAWAMURA, Kouji SUGAMA, Hiroyuki KONNO, Hiroshi NAGASAWA
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Publication number: 20130190473Abstract: Disclosed is a toner for electrostatic image development that has low-temperature fixability and hot offset resistance and also has document offset resistance. The toner contains a hyperbranched polymer which is a homopolymer formed using an inimer having, in its molecule, a polymerizable functional group and a polymerization initiating group or is a copolymer formed using the inimer and a vinyl-based monomer. The hyperbranched polymer is preferably a terminal-modified hyperbranched polymer and is preferably obtained by a living radical polymerization process.Type: ApplicationFiled: January 18, 2013Publication date: July 25, 2013Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Hiroshi NAGASAWA, Kouji SUGAMA, Hiroyuki KONNO, Takaki KAWAMURA
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Patent number: 8467954Abstract: Tour guide contents stored in a tour guide apparatus carried by a user at a tour destination are provided with points of interest information and map data. This information includes latitude and longitude information for the site of each point of interest, and information on the providers of the information and the categories of information. The latitude and longitude information is provided for each site in relation to map data. By matching these pieces of latitude and longitude information to the map data, points of interest information can be laid out on the map and displayed. This makes it possible to select interesting site information to be displayed on the map based on the information provider, for example, points of interest information provided by provider A for restaurants and another set of information provided by provider B for hotels.Type: GrantFiled: June 10, 2011Date of Patent: June 18, 2013Assignee: Sony CorporationInventors: Naoshi Kobuya, Toru Masano, Motoya Itako, Atsushi Noda, Hiroshi Nagasawa
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Publication number: 20130108953Abstract: Disclosed is a toner for electrostatic linage development that has sufficient low-temperature fixability, can provide high post-fixing separability, and can be used for stable formation of images at high speed. The toner for electrostatic image development includes toner particles containing a binder resin. The binder resin contains as a part thereof a block copolymer having an A-B-A block copolymer structure including polymer blocks A composed of a structural unit derived from an alkyl methacrylate and a polymer block B composed of a structural unit derived from an alkyl acrylate. The glass transition point (TgA) of a homopolymer of the alkyl methacrylate forming the polymer blocks A is higher than the glass transition point (TgB) of a homopolymer of the alkyl acrylate forming the polymer block B.Type: ApplicationFiled: October 23, 2012Publication date: May 2, 2013Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Takaki KAWAMURA, Hiroyuki KONNO, Kouji SUGAMA, Hiroshi NAGASAWA
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Patent number: 8386165Abstract: Tour guide contents stored in a tour guide apparatus carried by a user at a tour destination are provided with points of interest information and map data. This information includes latitude and longitude information for the site of each point of interest, and information on the providers of the information and the categories of information. The latitude and longitude information is provided for each site in relation to map data. By matching these pieces of latitude and longitude information to the map data, points of interest information can be laid out on the map and displayed. This makes it possible to select interesting site information to be displayed on the map based on the information provider, for example, points of interest information provided by provider A for restaurants and another set of information provided by provider B for hotels.Type: GrantFiled: March 31, 2010Date of Patent: February 26, 2013Assignee: Sony CorporationInventors: Naoshi Kobuya, Toru Masano, Motoya Itako, Atsushi Noda, Hiroshi Nagasawa
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Patent number: 8361688Abstract: Disclosed is a toner including: a resin; coloring agent and release agent including compound or compounds represented by the following general formula (1): R1—(COO—R2)n, wherein R1 is a linking group having carbon number of 2 to 8 which may be a cyclic structure and may have a hydroxy group or fatty acid ester group; and each R2 is an alkyl group having carbon number of N, (N-2) or (N-4) independently, N is a natural number from 10 to 30, and n is a natural number from 3 to 4, R2 with carbon number of N is 80 to 97 percent by mass, R2 with carbon number of (N-2) is 0.0 to 7.8 percent by mass, R2 with carbon number of (N-4) is 3.0 to 13.0 percent by mass, R2 with carbon number of (N-4) is included 1.5 percent by mass or more than R2 with carbon number of (N-2).Type: GrantFiled: January 6, 2010Date of Patent: January 29, 2013Assignee: Konica Minolta Business Technologies, Inc.Inventors: Mikio Kouyama, Kenji Hayashi, Hiroaki Obata, Noriyuki Kinpara, Hiroshi Nagasawa, Yasuhiko Muramatsu
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Publication number: 20130004891Abstract: A toner comprising a modified polyester resin containing a structure represented by Formula (1a) or (1b), wherein, in Formula (1a) and (1b), R1 represents a hydrogen atom, a methyl group, or an ethyl group, R2 represents an aliphatic hydrocarbon which may be branched, or an aromatic hydrocarbon, and R3 represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a phenyl group.Type: ApplicationFiled: June 21, 2012Publication date: January 3, 2013Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Hiroshi NAGASAWA, Ken OHMURA
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Patent number: 8283098Abstract: A preparation method of a toner comprising a binder resin and a colorant is disclosed, comprising forming resin particles containing a resin formed by allowing a styrene monomer, a (meth)acryl monomer and a polymer represented by the formula (1) to react, and mixing the resin particles with colorant particles which were dispersed and allowing the resin particles and the colorant particle to coagulate and fuse to form toner particles, X—(Y)n—X??formula (1) wherein X is at least one of an acryloyl group and a methacryloyl group, Y is a radical polymerizable monomer unit and n is an integer of 25 to 1000.Type: GrantFiled: October 26, 2009Date of Patent: October 9, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Mikio Kouyama, Kenji Hayashi, Hiroaki Obata, Noriyuki Kimpara, Hiroshi Nagasawa
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Patent number: 8206882Abstract: The object aims to improve the reproducibility of color and the stability in density of a toner. Disclosed is a toner comprising at least a resin and a colorant, wherein the colorant comprises a compound represented by general formula (1) and a compound represented by general formula (2). [In general formula (1), R1 to R8 respectively denote a hydrogen atom, a halogen atom, an alkyl group, or an alkyl group containing a fluorine atom, provided that at least one of R1 to R8 denotes a chlorine atom]. [In general formula (2), R1 to R4 respectively denote a hydrogen atom, or an alkyl group having 1 to 4 carbon atoms; R5 and R6 respectively denote a hydrogen atom, or an alkyl group having 1 to 2 carbon atoms; R7 denotes a hydrogen atom, or an alkyl group having 1 to 4 carbon atoms; m denotes a number of 1 or 2; An? denotes a chlorine ion or a sulfonic acid compound ion; and n denotes a number of 1 or 2.Type: GrantFiled: July 23, 2009Date of Patent: June 26, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Mikio Koyama, Kenji Hayashi, Hiroaki Obata, Noriyuki Kinpara, Hiroshi Nagasawa, Yasuhiko Muramatsu
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Publication number: 20120021353Abstract: Disclosed is a method for producing toner, comprising (1) mixing, with an aqueous medium, a resin solution of an organic solvent in which amorphous polyester resin having unsaturated dicarboxylic acid monomer units is dissolved, and forming an amorphous polyester resin particle dispersion; (2) adding a radical polymerization initiator to the amorphous polyester resin particle dispersion obtained in (1), cross-linking the amorphous polyester resin, and forming a cross-linked amorphous polyester resin particle dispersion; and (3) mixing at least the cross-linked amorphous polyester resin particle dispersion obtained in (2), with a crystalline polyester resin particle dispersion, aggregating cross-linked amorphous polyester resin particles and crystalline polyester resin particles, and forming toner particles.Type: ApplicationFiled: July 19, 2011Publication date: January 26, 2012Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Hiroshi NAGASAWA, Mikio KOUYAMA, Kenji HAYASHI, Hiroaki OBATA
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Patent number: 8058440Abstract: 5-Methyl-4,5,6,7-tetrahydrothiazolo[5,4-c]pyridine-2-carboxylic acid of formula (5) or a salt thereof, is prepared by reacting reacting 2-bromo-5-methyl-4,5,6,7-tetrahydrothiazolo[5,4-c]pyridine of formula (3) or a salt thereof, with a metal cyanide, to obtain 2-cyano-5-methyl-4,5,6,7-tetrahydrothiazolo[5,4-c]pyridine of formula (4) or a salt thereof, and hydrolyzing the 2-cyano-5-methyl-4,5,6,7-tetrahydrothiazolo[5,4-c]pyridine of formula (4) or a salt thereof.Type: GrantFiled: November 8, 2010Date of Patent: November 15, 2011Assignee: Daiichi Sankyo Company, LimitedInventors: Hiroshi Nagasawa, Koji Sato, Tsutomu Yagi, Yasuo Kitani
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Publication number: 20110256479Abstract: An image forming method is disclosed, comprising transferring and fixing steps, wherein fixing is performed by a fixing device in which at least one of a heating member and a pressing member comprises an endless belt entrained about plural rollers, and the heating member and the pressing member are pressed against each other to form a fixing nip, and wherein toner particles contains a binder resin which has a domain/matrix structure constituted of a high-elastic resin forming a domain and a low-elastic resin forming a matrix in an elastic image obtained when observing the toner particles by an atomic force microscope with respect to a section of the individual toner particles, in which an arithmetic average value of a ratio (L/W) of a major axis (L) to a minor axis (W) of individual domains is 1.5 to 5.Type: ApplicationFiled: April 7, 2011Publication date: October 20, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Noboru UEDA, Hiroshi NAGASAWA, Anju HORI
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Publication number: 20110256476Abstract: A toner for developing electrostatic image comprising a toner particle containing a binding resin is disclosed. which, and In the toner the binding resin has a domain-matrix structure composed of a high elastic resin composing a domain and a low elastic resin composing a matrix, an arithmetic mean value of ratio (L/W) of the Length L to Width W of the domains is 1.5 to 5.0, domains having Length L in the range of 60 to 500 nm exist 80 number % or more, and domains having Width Win the range of 45 to 100 nm exist 80 number % or more, in a viscoelastic image of a cross section of the toner particle observed via an atomic force microscope.Type: ApplicationFiled: April 7, 2011Publication date: October 20, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Anju HORI, Noboru UEDA, Hiroshi NAGASAWA