Patents by Inventor Toshihiro Endo
Toshihiro Endo 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: 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
-
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
-
Patent number: 10619531Abstract: As a lubricant present between a transfer belt for transferring a print sheet and a platen plate on a rear side thereof and bringing the both into close contact, a lubricant containing 70 weight % or more of a fatty acid ester solvent with carbon number in a molecule of 20 or more and 34 or less is used so as to reduce sliding between the transfer belt and the platen plate and sliding resistance generated between the transfer belt for transferring the print sheet and an auxiliary plate arranged along this.Type: GrantFiled: January 12, 2018Date of Patent: April 14, 2020Assignee: RISO KAGAKU CORPORATIONInventor: Toshihiro Endo
-
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
-
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
-
Publication number: 20180229510Abstract: As a lubricant present between a transfer belt for transferring a print sheet and a platen plate on a rear side thereof and bringing the both into close contact, a lubricant containing 70 weight % or more of a fatty acid ester solvent with carbon number in a molecule of 20 or more and 34 or less is used so as to reduce sliding between the transfer belt and the platen plate and sliding resistance generated between the transfer belt for transferring the print sheet and an auxiliary plate arranged along this.Type: ApplicationFiled: January 12, 2018Publication date: August 16, 2018Inventor: Toshihiro ENDO
-
Patent number: 9845402Abstract: An oil-based inkjet ink set including two or more liquid compositions, for use with an inkjet head having two or more discharge port arrays, wherein at least one of the two or more liquid compositions is an oil-based inkjet ink, the initial boiling point of each of the two or more liquid compositions is, independently, 280° C. or higher, and the difference in the specific gravities of any pair of liquid compositions in the two or more liquid compositions is at least 0.005 but not more than 0.012, is disclosed. A method for producing a printed item is also disclosed.Type: GrantFiled: February 27, 2017Date of Patent: December 19, 2017Assignee: RISO KAGAKU CORPORATIONInventors: Shinichiro Shimura, Toshihiro Endo, Akiko Yamamoto
-
Publication number: 20170253756Abstract: An oil-based inkjet ink set including two or more liquid compositions, for use with an inkjet head having two or more discharge port arrays, wherein at least one of the two or more liquid compositions is an oil-based inkjet ink, the initial boiling point of each of the two or more liquid compositions is, independently, 280° C. or higher, and the difference in the specific gravities of any pair of liquid compositions in the two or more liquid compositions is at least 0.005 but not more than 0.012, is disclosed. A method for producing a printed item is also disclosed.Type: ApplicationFiled: February 27, 2017Publication date: September 7, 2017Inventors: Shinichiro SHIMURA, Toshihiro ENDO, Akiko YAMAMOTO
-
Patent number: 9624394Abstract: An inkjet printing process including forming an image by superposing two or more kinds of inks, wherein the two or more kinds of inks contain (A) an ink containing at least a first coloring material, a non-aqueous solvent, a non-aqueous resin, and a water-soluble resin having an amino group, and (B) an ink containing at least a second coloring material, a non-aqueous solvent, and a nitrogen-containing graft copolymer having a polyester side chain, and a non-aqueous ink set containing the ink (A) and the ink (B).Type: GrantFiled: December 18, 2014Date of Patent: April 18, 2017Assignee: RISO KAGAKU CORPORATIONInventors: Toshihiro Endo, Shinichiro Shimura, Naoyuki Torita
-
Patent number: 9624402Abstract: The method is a non-aqueous inkjet printing method including the steps of: ejecting droplets of a non-aqueous pigment ink containing at least a pigment and a non-aqueous solvent onto a surface of a printing medium to form dots composed of the non-aqueous pigment ink, and then ejecting droplets of a non-aqueous post-treatment liquid containing at least silica and an organic solvent toward the printing medium so that the droplets overlap with the dots composed of the non-aqueous pigment ink, wherein either of the non-aqueous pigment ink and the post-treatment liquid contains a water-soluble resin having an amino group.Type: GrantFiled: December 18, 2014Date of Patent: April 18, 2017Assignee: RISO KAGAKU CORPORATIONInventors: Shinichiro Shimura, Teruaki Okawa, Toshihiro Endo, Tetsuo Hosoya, Naoyuki Torita, Hikaru Sugiura, Hiroshi Hayashi
-
Patent number: 9593251Abstract: A non-aqueous pigment ink includes a pigment, a non-aqueous solvent, a non-water-soluble resin and a water-soluble resin, wherein the non-water-soluble resin is an acrylic polymer formed by a copolymer of a monomer mixture containing at least an alkyl (meth)acrylate (A) having a C8 to C18 alkyl group and a monomer (B) having a ?-diketone group or ?-keto acid ester group.Type: GrantFiled: May 18, 2016Date of Patent: March 14, 2017Assignee: RISO KAGAKU CORPORATIONInventors: Tetsuo Hosoya, Toshihiro Endo, Naofumi Ezaki, Shinichiro Shimura, Naoyuki Torita, Marie Morinaga
-
Publication number: 20160264806Abstract: A non-aqueous pigment ink includes a pigment, a non-aqueous solvent, a non-water-soluble resin and a water-soluble resin, wherein the non-water-soluble resin is an acrylic polymer formed by a copolymer of a monomer mixture containing at least an alkyl (meth)acrylate (A) having a C8 to C18 alkyl group and a monomer (B) having a ?-diketone group or ?-keto acid ester group.Type: ApplicationFiled: May 18, 2016Publication date: September 15, 2016Applicant: RISO KAGAKU CORPORATIONInventors: Tetsuo HOSOYA, Toshihiro ENDO, Naofumi EZAKI, Shinichiro SHIMURA, Naoyuki TORITA, Marie MORINAGA
-
Patent number: 9365736Abstract: A non-aqueous pigment ink includes a pigment, a non-aqueous solvent, a non-water-soluble resin and a water-soluble resin, wherein the non-water-soluble resin is an acrylic polymer formed by a copolymer of a monomer mixture containing at least an alkyl(meth)acrylate (A) having a C8 to C18 alkyl group and a monomer (B) having a ?-diketone group or ?-keto acid ester group.Type: GrantFiled: July 2, 2013Date of Patent: June 14, 2016Assignee: RISO KAGAKU CORPORATIONInventors: Tetsuo Hosoya, Toshihiro Endo, Naofumi Ezaki, Shinichiro Shimura, Naoyuki Torita, Marie Morinaga
-
Patent number: 9365735Abstract: In a non-aqueous pigment ink that includes pigment, a non-aqueous solvent, and a non-aqueous resin that functions to disperse pigment dissolved in the non-aqueous solvent, the non-aqueous solvent includes a hydrocarbon based non polar solvent at 50% by mass or more with respect to the total amount of solvent. The non-aqueous resin is an acrylic polymer having a comb shaped structure, in which alkyl groups having carbon numbers from 8 to 18 and urethane groups form side chains on a (meth)acrylate main chain. The acrylic polymer is a copolymer of an alkyl(meth)acrylate (A) having alkyl groups with a carbon number from 8 to 18, a reactive (meth)acrylate (B) having functional groups that react with amino groups, and a monomer (C) having ?-diketone groups or ?-keto acid ester groups, into which the urethane groups are introduced by reactions between the functional groups that react with amino groups, amino alcohol, and a multivalent isocyanate compound.Type: GrantFiled: December 19, 2012Date of Patent: June 14, 2016Assignee: RISO KAGAKU CORPORATIONInventors: Tetsuo Hosoya, Toshihiro Endo, Syotaro Kon
-
Patent number: 9260620Abstract: [Problem to be solved] A non-aqueous ink, which has excellent pigment dispersion stability and can achieve reduction or elimination of print-through, thereby achieving high print density, is disclosed. [Solution] The non-aqueous ink contains at least a pigment and an organic solvent, wherein the organic solvent contains a five-membered heterocyclic compound having a C?O bond in an amount of 50 mass % or more of the organic solvent, and the content of a polymer component in the ink is 20 mass % or less relative to the pigment.Type: GrantFiled: October 17, 2011Date of Patent: February 16, 2016Assignee: Riso Kagaku CorporationInventors: Toshihiro Endo, Tetsuo Hosoya
-
Publication number: 20150184012Abstract: An inkjet printing process including forming an image by superposing two or more kinds of inks, wherein the two or more kinds of inks contain (A) an ink containing at least a first coloring material, a non-aqueous solvent, a non-aqueous resin, and a water-soluble resin having an amino group, and (B) an ink containing at least a second coloring material, a non-aqueous solvent, and a nitrogen-containing graft copolymer having a polyester side chain, and a non-aqueous ink set containing the ink (A) and the ink (B).Type: ApplicationFiled: December 18, 2014Publication date: July 2, 2015Applicant: RISO KAGAKU CORPORATIONInventors: Toshihiro ENDO, Shinichiro SHIMURA, Naoyuki TORITA
-
Publication number: 20150184011Abstract: The method is a non-aqueous inkjet printing method including the steps of: ejecting droplets of a non-aqueous pigment ink containing at least a pigment and a non-aqueous solvent onto a surface of a printing medium to form dots composed of the non-aqueous pigment ink, and then ejecting droplets of a non-aqueous post-treatment liquid containing at least silica and an organic solvent toward the printing medium so that the droplets overlap with the dots composed of the non-aqueous pigment ink, wherein either of the non-aqueous pigment ink and the post-treatment liquid contains a water-soluble resin having an amino group.Type: ApplicationFiled: December 18, 2014Publication date: July 2, 2015Applicant: RISO KAGAKU CORPORATIONInventors: Shinichiro SHIMURA, Teruaki OKAWA, Toshihiro ENDO, Tetsuo HOSOYA, Naoyuki TORITA, Hikaru SUGIURA, Hiroshi HAYASHI
-
Publication number: 20150005412Abstract: In a non-aqueous pigment ink that includes pigment, a non-aqueous solvent, and a non-aqueous resin that functions to disperse pigment dissolved in the non-aqueous solvent, the non-aqueous solvent includes a hydrocarbon based non polar solvent at 50% by mass or more with respect to the total amount of solvent. The non-aqueous resin is an acrylic polymer having a comb shaped structure, in which alkyl groups having carbon numbers from 8 to 18 and urethane groups form side chains on a (meth)acrylate main chain. The acrylic polymer is a copolymer of an alkyl(meth)acrylate (A) having alkyl groups with a carbon number from 8 to 18, a reactive (meth)acrylate (B) having functional groups that react with amino groups, and a monomer (C) having ?-diketone groups or ?-keto acid ester groups, into which the urethane groups are introduced by reactions between the functional groups that react with amino groups, amino alcohol, and a multivalent isocyanate compound.Type: ApplicationFiled: December 19, 2012Publication date: January 1, 2015Inventors: Tetsuo Hosoya, Toshihiro Endo, Syotaro Kon
-
Patent number: 8915994Abstract: [Problem to be solved] A non-aqueous ink, which has excellent pigment dispersion stability and can achieve reduction or elimination of print-through, thereby achieving high print density, is disclosed. [Solution] The non-aqueous ink contains at least a pigment and an organic solvent, wherein the organic solvent contains a five-membered heterocyclic compound having a C?O bond in an amount of 50 mass % or more of the organic solvent, and the content of a polymer component in the ink is 20 mass % or less relative to the pigment.Type: GrantFiled: October 17, 2011Date of Patent: December 23, 2014Assignee: Riso Kagaku CorporationInventors: Toshihiro Endo, Tetsuo Hosoya
-
Patent number: 8765838Abstract: A non-aqueous ink composition for inkjet printing, comprising 5 to 15% by mass of pigment relative to a mass of the non-aqueous ink composition, a pigment dispersant in such an amount that a mass ratio of the pigment dispersant to the pigment ranges from 0.2 to 2.0, and an organic solvent, the pigment dispersant comprising (A) a polyamide having a polyester side chain and/or a copolymer of vinylpyrrolidone and a C10-40 alkene, and (B) an alkyl(alkyl)acrylate copolymer having a C12-25 alkyl group and a nitrogen-containing group in such an amount that a mass ratio of the dispersant (B) to a total of the dispersant (A) and the dispersant (B), (B)/[(A)+(B)], ranges from 0.75 to 0.99. The ink composition has good storage stability and causes no satellite even printed in an environment of a low temperature.Type: GrantFiled: September 27, 2011Date of Patent: July 1, 2014Assignee: Riso Kagaku CorporationInventors: Tetsuo Hosoya, Toshihiro Endo