Patents by Inventor Kazuyuki Ando
Kazuyuki Ando 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: 11525065Abstract: Provided is an oil-based inkjet ink containing a pigment and a fatty acid ester-based solvent represented by general formula (1) shown below and having at least 18 but not more than 29 carbon atoms per molecule. In general formula (1), R1 represents an alkyl group of 5 or more carbon atoms, R2 represents an alkyl group of 6 or more carbon atoms, and at least one of R1 and R2 is a branched alkyl group of 9 or more carbon atoms having a side chain of 4 or more carbon atoms.Type: GrantFiled: March 26, 2018Date of Patent: December 13, 2022Assignee: RISO KAGAKU CORPORATIONInventors: Kazuyuki Ando, Shinichiro Shimura, Marie Morinaga, Hikaru Sugiura, Shinsuke Ozawa, Noriaki Sugawara
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Patent number: 11193033Abstract: An oil-based inkjet ink can be provided that prevents adhesion of the ink to the nozzle plate, thereby preventing ink misfires and discharge defects from the inkjet nozzles. The oil-based inkjet ink contains a pigment, a non-aqueous solvent, and a compound represented by general formula (1) shown below. (In general formula (1), m represents 1 or 2, each of R1 and R2 independently represents a monovalent saturated hydrocarbon group, R3 represents a single bond or a divalent saturated hydrocarbon group, and R4 represents a monovalent or divalent saturated hydrocarbon group.Type: GrantFiled: April 27, 2018Date of Patent: December 7, 2021Assignee: RISO KAGAKU CORPORATIONInventors: Shinichiro Shimura, Toshihiro Endo, Kazuyuki Ando
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Patent number: 11174406Abstract: An ink is provided which can prevent the deformation and degradation of resin products by printed items, and is also suitable for inkjet printing. The oil-based inkjet ink contains a colorant and a fatty acid ester-based solvent represented by general formula (1) shown below and having 12 to 23 carbon atoms in one molecule. (In general formula (1), each of R1 and R2 independently represents an alkyl group, and at least one of the alkyl groups of R1 and R2 is a branched alkyl group having a side chain of at least 4 carbon atoms.).Type: GrantFiled: March 26, 2018Date of Patent: November 16, 2021Assignee: RISO KAGAKU CORPORATIONInventors: Hikaru Sugiura, Kazuyuki Ando, Shinsuke Ozawa
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Patent number: 10894897Abstract: An oil-based inkjet ink can be provided which prevents dye conversion of a dye lake pigment contained in the ink, prevents adhesion of the ink to the nozzle plate, and yields excellent drying properties for printed items. The oil-based inkjet ink contains a dye lake pigment, a pigment dispersant and a non-aqueous solvent, wherein the non-aqueous solvent contains a silicone oil having a surface tension of at least 20 mN/m but not more than 28 mN/m. The surface tension of the silicone oil is preferably at least 22 mN/m but not more than 26 mN/m.Type: GrantFiled: February 26, 2018Date of Patent: January 19, 2021Assignee: RISO KAGAKU CORPORATIONInventors: Marie Morinaga, Shinichiro Shimura, Kazuyuki Ando, Hikaru Sugiura
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Patent number: 10889730Abstract: An oil-based inkjet ink set is disclosed that includes: an oil-based inkjet ink A containing a non-aqueous solvent, the non-aqueous solvent of the oil-based inkjet ink A containing at least 15% by mass of a silicone oil relative to the total mass of the non-aqueous solvent of the oil-based inkjet ink A, and an oil-based inkjet ink B containing a non-aqueous solvent, the non-aqueous solvent of the oil-based inkjet ink B containing at least 50% by mass of a petroleum-based hydrocarbon solvent relative to the total mass of the non-aqueous solvent of the oil-based inkjet ink B. A method for producing a printed item is also disclosed.Type: GrantFiled: September 25, 2018Date of Patent: January 12, 2021Assignee: RISO KAGAKU CORPORATIONInventors: Marie Morinaga, Toshihiro Endo, Shinichiro Shimura, Kazuyuki Ando, Hikaru Sugiura, Shinsuke Ozawa
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Patent number: 10865322Abstract: An oil-based inkjet ink can be provided which exhibits excellent discharge stability even after a long idle period, and also yields high image density and prevents show-through in printed items. The oil-based inkjet ink contains a pigment, an amide-based dispersant and a non-aqueous solvent, wherein the non-aqueous solvent contains a modified silicone oil having 2 or 3 silicon atoms in one molecule, and a petroleum-based hydrocarbon solvent.Type: GrantFiled: February 26, 2018Date of Patent: December 15, 2020Assignee: RISO KAGAKU CORPORATIONInventors: Hikaru Sugiura, Shinichiro Shimura, Marie Morinaga, Kazuyuki Ando
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Patent number: 10865321Abstract: An oil-based inkjet ink is disclosed, the oil-based inkjet ink containing a pigment, a pigment dispersant and a non-aqueous solvent, wherein the pigment contains an acidic carbon black having a pH of 2 to 6, the non-aqueous solvent contains a modified silicone oil having a surface tension of not more than 27 mN/m, and an amount of the modified silicone oil, relative to a total mass of the oil-based inkjet ink, is at least 15% by mass but not more than 80% by mass.Type: GrantFiled: February 26, 2018Date of Patent: December 15, 2020Assignee: RISO KAGAKU CORPORATIONInventors: Kazuyuki Ando, Shinichiro Shimura, Marie Morinaga, Hikaru Sugiura
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Patent number: 10808137Abstract: A method for producing a printed item including discharging two or more inks by an inkjet method toward a recording medium to form an image is disclosed, wherein the two or more inks include a first oil-based inkjet ink containing a first colorant and a non-aqueous solvent and having an ink surface tension of less than 27.0 mN/m, and a second oil-based inkjet ink containing a second colorant and a non-aqueous solvent and having an ink surface tension of 27.0 mN/m or greater, and the method includes discharging the first oil-based inkjet ink toward the recording medium at a discharge volume of at least 20 pl per one liquid droplet to form dots with the first oil-based inkjet ink, and subsequently discharging the second oil-based inkjet ink toward the recording medium at a discharge volume of less than 20 pl per one liquid droplet so as to overlap with the dots formed with the first oil-based inkjet ink.Type: GrantFiled: September 25, 2018Date of Patent: October 20, 2020Assignee: RISO KAGAKU CORPORATIONInventors: Kazuyuki Ando, Shinichiro Shimura, Marie Morinaga, Hikaru Sugiura, Shinsuke Ozawa
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Patent number: 10793734Abstract: Disclosed is an oil-based inkjet ink containing a colorant and a non-aqueous solvent, wherein the non-aqueous solvent contains at least 15% by mass but not more than 100% by mass, relative to the total mass of the non-aqueous solvent, of an organosilicon compound having 2 to 6 silicon atoms in one molecule, having an organic group in which a carbon atom is bonded directly to a silicon atom and in which the total number of carbon atoms and oxygen atoms is at least 4, and having a total number of carbon atoms and oxygen atoms, contained within all of the organic groups in which the total number of carbon atoms and oxygen atoms is at least 4, that is from 4 to 20 within one molecule.Type: GrantFiled: February 26, 2018Date of Patent: October 6, 2020Assignee: RISO KAGAKU CORPORATIONInventors: Hikaru Sugiura, Shinsuke Ozawa, Shinichiro Shimura, Kazuyuki Ando, Marie Morinaga, Teruaki Okawa, Noriaki Sugawara
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Patent number: 10717887Abstract: An oil-based inkjet is disclosed, the oil-based inkjet ink containing a pigment, a pigment dispersant and a non-aqueous solvent, wherein the non-aqueous solvent contains a silicone oil having a surface tension of at least 19.0 mN/m but less than 24.0 mN/m and a polar solvent having a surface tension of at least 27.0 mN/m, and a surface tension of the ink is at least 23.0 mN/m but less than 27.0 mN/m.Type: GrantFiled: February 26, 2018Date of Patent: July 21, 2020Assignee: RISO KAGAKU CORPORATIONInventors: Hikaru Sugiura, Shinichiro Shimura, Marie Morinaga, Kazuyuki Ando
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Patent number: 10569546Abstract: An inkjet printer includes: an oil-based ink containing silicone oil; and inkjet heads each including a nozzle row in which nozzles configured to eject the oil-based ink to a print medium conveyed in a conveyance direction are arranged, the inkjet heads being arranged adjacent to each other with the nozzles in each nozzle row arranged in a direction non-orthogonally intersecting the conveyance direction.Type: GrantFiled: August 8, 2018Date of Patent: February 25, 2020Assignee: RISO KAGAKU CORPORATIONInventors: Shinsuke Ozawa, Shinichiro Shimura, Marie Morinaga, Kazuyuki Ando, Hikaru Sugiura
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Publication number: 20200017702Abstract: Provided is an oil-based inkjet ink containing a pigment and a fatty acid ester-based solvent represented by general formula (1) shown below and having at least 18 but not more than 29 carbon atoms per molecule. In general formula (1), R1 represents an alkyl group of 5 or more carbon atoms, R2 represents an alkyl group of 6 or more carbon atoms, and at least one of R1 and R2 is a branched alkyl group of 9 or more carbon atoms having a side chain of 4 or more carbon atoms.Type: ApplicationFiled: March 26, 2018Publication date: January 16, 2020Inventors: Kazuyuki ANDO, Shinichiro SHIMURA, Marie MORINAGA, Hikaru SUGIURA, Shinsuke OZAWA, Noriaki SUGAWARA
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Publication number: 20190100671Abstract: An oil-based inkjet ink set is disclosed that includes: an oil-based inkjet ink A containing a non-aqueous solvent, the non-aqueous solvent of the oil-based inkjet ink A containing at least 15% by mass of a silicone oil relative to the total mass of the non-aqueous solvent of the oil-based inkjet ink A, and an oil-based inkjet ink B containing a non-aqueous solvent, the non-aqueous solvent of the oil-based inkjet ink B containing at least 50% by mass of a petroleum-based hydrocarbon solvent relative to the total mass of the non-aqueous solvent of the oil-based inkjet ink B. A method for producing a printed item is also disclosed.Type: ApplicationFiled: September 25, 2018Publication date: April 4, 2019Applicant: RISO KAGAKU CORPORATIONInventors: Marie MORINAGA, Toshihiro ENDO, Shinichiro SHIMURA, Kazuyuki ANDO, Hikaru SUGIURA, Shinsuke OZAWA
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Publication number: 20190100668Abstract: A method for producing a printed item including discharging two or more inks by an inkjet method toward a recording medium to form an image is disclosed, wherein the two or more inks include a first oil-based inkjet ink containing a first colorant and a non-aqueous solvent and having an ink surface tension of less than 27.0 mN/m, and a second oil-based inkjet ink containing a second colorant and a non-aqueous solvent and having an ink surface tension of 27.0 mN/m or greater, and the method includes discharging the first oil-based inkjet ink toward the recording medium at a discharge volume of at least 20 pl per one liquid droplet to form dots with the first oil-based inkjet ink, and subsequently discharging the second oil-based inkjet ink toward the recording medium at a discharge volume of less than 20 pl per one liquid droplet so as to overlap with the dots formed with the first oil-based inkjet ink.Type: ApplicationFiled: September 25, 2018Publication date: April 4, 2019Applicant: RISO KAGAKU CORPORATIONInventors: Kazuyuki ANDO, Shinichiro SHIMURA, Marie MORINAGA, Hikaru SUGIURA, Shinsuke OZAWA
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Publication number: 20190100002Abstract: An inkjet printer includes: an oil-based ink containing silicone oil; and inkjet heads each including a nozzle row in which nozzles configured to eject the oil-based ink to a print medium conveyed in a conveyance direction are arranged, the inkjet heads being arranged adjacent to each other with the nozzles in each nozzle row arranged in a direction non-orthogonally intersecting the conveyance direction.Type: ApplicationFiled: August 8, 2018Publication date: April 4, 2019Applicant: RISO KAGAKU CORPORATIONInventors: Shinsuke OZAWA, Shinichiro SHIMURA, Marie MORINAGA, Kazuyuki ANDO, Hikaru SUGIURA
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Publication number: 20190085194Abstract: An ink is provided which can prevent the deformation and degradation of resin products by printed items, and is also suitable for inkjet printing. The oil-based inkjet ink contains a colorant and a fatty acid ester-based solvent represented by general formula (1) shown below and having 12 to 23 carbon atoms in one molecule. (In general formula (1), each of R1 and R2 independently represents an alkyl group, and at least one of the alkyl groups of R1 and R2 is a branched alkyl group having a side chain of at least 4 carbon atoms.Type: ApplicationFiled: March 26, 2018Publication date: March 21, 2019Inventors: Hikaru Sugiura, Kazuyuki Ando, Shinsuke Ozawa
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Publication number: 20180340088Abstract: An oil-based inkjet ink can be provided that prevents adhesion of the ink to the nozzle plate, thereby preventing ink misfires and discharge defects from the inkjet nozzles. The oil-based inkjet ink contains a pigment, a non-aqueous solvent, and a compound represented by general formula (1) shown below. (In general formula (1), m represents 1 or 2, each of R1 and R2 independently represents a monovalent saturated hydrocarbon group, R3 represents a single bond or a divalent saturated hydrocarbon group, and R4 represents a monovalent or divalent saturated hydrocarbon group.Type: ApplicationFiled: April 27, 2018Publication date: November 29, 2018Inventors: Shinichiro SHIMURA, Toshihiro ENDO, Kazuyuki ANDO
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Publication number: 20180244940Abstract: An oil-based inkjet ink is disclosed, the oil-based inkjet ink containing a pigment, a pigment dispersant and a non-aqueous solvent, wherein the pigment contains an acidic carbon black having a pH of 2 to 6, the non-aqueous solvent contains a modified silicone oil having a surface tension of not more than 27 mN/m, and an amount of the modified silicone oil, relative to a total mass of the oil-based inkjet ink, is at least 15% by mass but not more than 80% by mass.Type: ApplicationFiled: February 26, 2018Publication date: August 30, 2018Applicant: RISO KAGAKU CORPORATIONInventors: Kazuyuki ANDO, Shinichiro SHIMURA, Marie MORINAGA, Hikaru SUGIURA
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Publication number: 20180244937Abstract: Disclosed is an oil-based inkjet ink containing a colorant and a non-aqueous solvent, wherein the non-aqueous solvent contains at least 15% by mass but not more than 100% by mass, relative to the total mass of the non-aqueous solvent, of an organosilicon compound having 2 to 6 silicon atoms in one molecule, having an organic group in which a carbon atom is bonded directly to a silicon atom and in which the total number of carbon atoms and oxygen atoms is at least 4, and having a total number of carbon atoms and oxygen atoms, contained within all of the organic groups in which the total number of carbon atoms and oxygen atoms is at least 4, that is from 4 to 20 within one molecule.Type: ApplicationFiled: February 26, 2018Publication date: August 30, 2018Applicant: RISO KAGAKU CORPORATIONInventors: Hikaru SUGIURA, Shinsuke OZAWA, Shinichiro SHIMURA, Kazuyuki ANDO, Marie MORINAGA, Teruaki OKAWA, Noriaki SUGAWARA
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Publication number: 20180244941Abstract: An oil-based inkjet ink can be provided which exhibits excellent discharge stability even after a long idle period, and also yields high image density and prevents show-through in printed items. The oil-based inkjet ink contains a pigment, an amide-based dispersant and a non-aqueous solvent, wherein the non-aqueous solvent contains a modified silicone oil having 2 or 3 silicon atoms in one molecule, and a petroleum-based hydrocarbon solvent.Type: ApplicationFiled: February 26, 2018Publication date: August 30, 2018Applicant: RISO KAGAKU CORPORATIONInventors: Hikaru SUGIURA, Shinichiro SHIMURA, Marie MORINAGA, Kazuyuki ANDO