Patents by Inventor Takahisa Yamazaki
Takahisa Yamazaki 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: 11981119Abstract: An inkjet printing apparatus includes: a first and a third head that ejects ink onto a print medium to form a printed image; a second head that coats the print medium with a treatment agent that contains a coagulant that coagulates ink; and a control unit that performs a two step ink ejection control process to control the first through third heads such that ink is ejected onto the print medium until a printing rate in a predetermined region of the print medium reaches a threshold value which is set in advance, coats the treatment agent thereafter, and then ejects ink according to a remaining printing rate after the treatment agent is coated.Type: GrantFiled: June 10, 2022Date of Patent: May 14, 2024Assignee: RISO KAGAKU CORPORATIONInventor: Takahisa Yamazaki
-
Publication number: 20240018377Abstract: Disclosed is an ink set for textile printing including: a pretreatment liquid that contains a polyvalent metal salt, a water-soluble organic solvent, and a surfactant; a white inkjet ink that contains a white pigment, resin particles, and a water-soluble organic solvent; and a non-white inkjet ink that contains a non-white pigment, resin particles, a water-soluble organic solvent, and a surfactant. Also disclosed is a method for producing a printed textile item.Type: ApplicationFiled: July 10, 2023Publication date: January 18, 2024Inventors: Akiko HAYASHI, Tetsuya SHIRAISHI, Takahisa YAMAZAKI, Ryo SHINOTSUKA, Takumi MATSUDA, Kokoro KINOE
-
Publication number: 20230416545Abstract: Provided is an aqueous pigment ink for textile inkjet printing, including a pigment, a water-dispersible resin, water, and a water-soluble organic solvent, wherein an ink film made by drying the aqueous pigment ink for textile inkjet printing has a weight change ratio of 20% or less between before and after immersion in warm water at 50° C., and has a film elongation of 50% to 300% after immersion in warm water at 50° C. Also provided is a method for producing a printed textile item.Type: ApplicationFiled: June 16, 2023Publication date: December 28, 2023Inventors: Takahisa YAMAZAKI, Masanori ITO, Takeshi KOYAMA
-
Patent number: 11781268Abstract: A method for producing a printed textile item is disclosed, the method including applying a pretreatment liquid containing a coagulant, water and a surfactant to a fabric, and, after the application of the pretreatment liquid, applying a white ink containing a white pigment and water to the fabric by an inkjet method, wherein a surface tension of the white ink at 0.05 Hz is within a range from 33 to 39 mN/m, a surface tension of the white ink at 10 Hz is 40 mN/m or greater, a specific gravity of the pretreatment liquid is greater than a specific gravity of the white ink, and the application of the white ink is performed within 100 seconds from the application of the pretreatment liquid and by a wet-on-wet method.Type: GrantFiled: May 31, 2022Date of Patent: October 10, 2023Assignee: RISO KAGAKU CORPORATIONInventors: Tetsuya Shiraishi, Akiko Hayashi, Kokoro Kinoe, Takahisa Yamazaki, Ryo Shinotsuka, Takumi Matsuda
-
Publication number: 20220410590Abstract: An inkjet printing apparatus includes: a first and a third head that ejects ink onto a print medium to form a printed image; a second head that coats the print medium with a treatment agent that contains a coagulant that coagulates ink; and a control unit that performs a two step ink ejection control process to control the first through third heads such that ink is ejected onto the print medium until a printing rate in a predetermined region of the print medium reaches a threshold value which is set in advance, coats the treatment agent thereafter, and then ejects ink according to a remaining printing rate after the treatment agent is coated.Type: ApplicationFiled: June 10, 2022Publication date: December 29, 2022Applicant: RISO KAGAKU CORPORATIONInventor: Takahisa YAMAZAKI
-
Publication number: 20220411999Abstract: A method for producing a printed textile item is disclosed, the method including applying a pretreatment liquid containing a coagulant, water and a surfactant to a fabric, and, after the application of the pretreatment liquid, applying a white ink containing a white pigment and water to the fabric by an inkjet method, wherein a surface tension of the white ink at 0.05 Hz is within a range from 33 to 39 mN/m, a surface tension of the white ink at 10 Hz is 40 mN/m or greater, a specific gravity of the pretreatment liquid is greater than a specific gravity of the white ink, and the application of the white ink is performed within 100 seconds from the application of the pretreatment liquid and by a wet-on-wet method.Type: ApplicationFiled: May 31, 2022Publication date: December 29, 2022Applicant: RISO KAGAKU CORPORATIONInventors: Tetsuya SHIRAISHI, Akiko HAYASHI, Kokoro KINOE, Takahisa YAMAZAKI, Ryo SHINOTSUKA, Takumi MATSUDA
-
Patent number: 11242649Abstract: An ink set for textile printing is disclosed which includes a pretreatment liquid containing a metal salt, a water-dispersible resin (A), an organic solvent (B) having an SP value of 10 to 14 (cal/cm3)1/2 and water, and an ink containing a pigment, a water-dispersible resin (C) having a glass transition point of 10° C. or higher, an organic solvent (D) and water. A method for producing a printed textile item is also disclosed.Type: GrantFiled: February 13, 2018Date of Patent: February 8, 2022Assignee: RISO KAGAKU CORPORATIONInventors: Yuki Urano, Takahisa Yamazaki, Hideki Imanishi, Shunsuke Uozumi
-
Patent number: 11135865Abstract: A method for producing printed matter that includes applying one of a first pretreatment liquid and a second pretreatment liquid, the other of the first pretreatment liquid and the second pretreatment liquid, and then an aqueous ink, in this order, to a recording region of a substrate using an inkjet recording apparatus, wherein the first pretreatment liquid and the second pretreatment liquid are jetted so as to land on the substrate in a fixed order, the first pretreatment liquid contains a coagulant, and the second pretreatment liquid does not contain a coagulant, but contains a penetrant.Type: GrantFiled: February 27, 2020Date of Patent: October 5, 2021Assignee: RISO KAGAKU CORPORATIONInventors: Yuki Urano, Akiko Hayashi, Takahisa Yamazaki, Mamoru Fukuda
-
Patent number: 11053406Abstract: An ink for inkjet textile printing is disclosed that contains a pigment, a water-dispersible urethane resin having a film elongation of 600% to 2,000%, a water-soluble organic solvent and water, wherein the weight ratio between the pigment and the water-dispersible urethane resin is from 1:3 to 1:16. An ink set and a method for producing a printed item are also disclosed.Type: GrantFiled: June 27, 2019Date of Patent: July 6, 2021Assignee: RISO KAGAKU CORPORATIONInventors: Akiko Hayashi, Takahisa Yamazaki, Kokoro Kinoe
-
Patent number: 10995230Abstract: An aqueous pigment ink for textile inkjet printing is disclosed that contains a pigment, a first water-dispersible resin, a second water-dispersible resin and water, wherein the first water-dispersible resin is at least one resin selected from the group consisting of a water-dispersible urethane resin, a water-dispersible (meth)acrylic resin and a water-dispersible styrene/(meth)acrylic resin, the second water-dispersible resin is a water-dispersible polyester resin, the total amount of the first water-dispersible resin and the second water-dispersible resin is from 2 to 18% by mass relative to the total mass of the ink, and the mass ratio of the second water-dispersible resin relative to the first water-dispersible resin (second water-dispersible resin/first water-dispersible resin) is from 0.1 to 5.0. A method for producing a printed textile item and an ink set are also disclosed.Type: GrantFiled: August 20, 2018Date of Patent: May 4, 2021Assignee: RISO KAGAKU CORPORATIONInventors: Takahisa Yamazaki, Akiko Hayashi, Shunsuke Uozumi, Kokoro Kinoe
-
Patent number: 10982385Abstract: A pretreatment liquid for inkjet textile printing is disclosed that includes water and a cellulose-based polymer having a weight average molecular weight of at least 50,000. A method for producing a printed textile item and an ink set for inkjet textile printing are also disclosed.Type: GrantFiled: March 11, 2019Date of Patent: April 20, 2021Assignee: RISO KAGAKU CORPORATIONInventors: Kokoro Kinoe, Akiko Hayashi, Takahisa Yamazaki, Shunsuke Uozumi
-
Publication number: 20200276850Abstract: A method for producing printed matter that includes applying one of a first pretreatment liquid and a second pretreatment liquid, the other of the first pretreatment liquid and the second pretreatment liquid, and then an aqueous ink, in this order, to a recording region of a substrate using an inkjet recording apparatus, wherein the first pretreatment liquid and the second pretreatment liquid are jetted so as to land on the substrate in a fixed order, the first pretreatment liquid contains a coagulant, and the second pretreatment liquid does not contain a coagulant, but contains a penetrant.Type: ApplicationFiled: February 27, 2020Publication date: September 3, 2020Inventors: Yuki URANO, Akiko HAYASHI, Takahisa YAMAZAKI, Mamoru FUKUDA
-
Patent number: 10662506Abstract: The present invention relates to a method for producing a platinum-based alloy powder, the method comprising a heat treatment of a mixed powder containing a platinum-based powder composed of at least one selected from the group consisting of platinum and platinum compound, a platinum group metal-based powder composed of at least one selected from the group consisting of iridium, rhodium, palladium, and compound containing at least one of them, and an alkaline-earth metal compound, wherein specific surface area of the platinum group metal-based powder is 30 m2/g or more and D90 of the mixed powder is 1.0 ?m or less. According to the method for producing a platinum-based alloy powder of the invention, it is possible to produce a platinum-based alloy powder that has a desired particle diameter, also has a sharp particle size distribution, and has high purity and crystallinity.Type: GrantFiled: August 7, 2015Date of Patent: May 26, 2020Assignee: TANAKA KIKINZOKU KOGYO K.K.Inventors: Akitoshi Wagawa, Akio Nagaoka, Takehiko Kawai, Takahisa Yamazaki
-
Patent number: 10569334Abstract: The present invention provides a process for producing a noble-metal powder, the process being capable of producing, at low cost, a noble-metal powder having a narrow particle-size distribution range, high purity and high crystallinity. The present invention relates to a process for producing a noble-metal powder and including a step in which an acidic aqueous solution of both one or more noble-metal compounds and a calcium compound is prepared, a step in which the acidic aqueous solution is added to a basic aqueous solution to yield one or more oxides or hydroxides of the noble metal(s) or a mixture of two or more thereof and yield a calcium hydroxide, a step in which the oxides or hydroxides of the noble metal(s) or the mixture is reduced with a reducing agent, and a step in which a solid matter including a reduced form of the noble metal(s) is separated and heat-treated.Type: GrantFiled: September 12, 2016Date of Patent: February 25, 2020Assignee: TANAKA KIKINZOKU KOGYO K.K.Inventors: Takahisa Yamazaki, Akio Nagaoka
-
Publication number: 20200002561Abstract: An ink for inkjet textile printing is disclosed that contains a pigment, a water-dispersible urethane resin having a film elongation of 600% to 2,000%, a water-soluble organic solvent and water, wherein the weight ratio between the pigment and the water-dispersible urethane resin is from 1:3 to 1:16. An ink set and a method for producing a printed item are also disclosed.Type: ApplicationFiled: June 27, 2019Publication date: January 2, 2020Applicant: RISO KAGAKU CORPORATIONInventors: Akiko HAYASHI, Takahisa YAMAZAKI, Kokoro KINOE
-
Publication number: 20190352846Abstract: A pretreatment liquid for inkjet textile printing is disclosed that includes water and a cellulose-based polymer having a weight average molecular weight of at least 50,000. A method for producing a printed textile item and an ink set for inkjet textile printing are also disclosed.Type: ApplicationFiled: March 11, 2019Publication date: November 21, 2019Inventors: Kokoro KINOE, Akiko HAYASHI, Takahisa YAMAZAKI, Shunsuke UOZUMI
-
Publication number: 20190352528Abstract: An aqueous pigment ink for textile inkjet printing is disclosed that contains a pigment, a first water-dispersible resin, a second water-dispersible resin and water, wherein the first water-dispersible resin is at least one resin selected from the group consisting of a water-dispersible urethane resin, a water-dispersible (meth)acrylic resin and a water-dispersible styrene/(meth)acrylic resin, the second water-dispersible resin is a water-dispersible polyester resin, the total amount of the first water-dispersible resin and the second water-dispersible resin is from 2 to 18% by mass relative to the total mass of the ink, and the mass ratio of the second water-dispersible resin relative to the first water-dispersible resin (second water-dispersible resin/first water-dispersible resin) is from 0.1 to 5.0. A method for producing a printed textile item and an ink set are also disclosed.Type: ApplicationFiled: August 20, 2018Publication date: November 21, 2019Inventors: Takahisa Yamazaki, Akiko Hayashi, Shunsuke Uozumi, Kokoro Kinoe
-
Patent number: 10150881Abstract: An aqueous inkjet ink set for textile printing is disclosed, the aqueous inkjet ink set including a first ink containing a water-dispersible resin having a glass transition point of less than ?5° C., a coloring material and water, and a second ink containing a water-dispersible resin having a glass transition point of from ?5° C. to 35° C., a coloring material and water. A method for producing a printed textile item is also disclosed.Type: GrantFiled: July 27, 2017Date of Patent: December 11, 2018Assignee: RISO KAGAKU CORPORATIONInventors: Takahisa Yamazaki, Yuki Urano, Hideki Imanishi, Shunsuke Uozumi
-
Publication number: 20180264555Abstract: The present invention provides a process for producing a noble-metal powder, the process being capable of producing, at low cost, a noble-metal powder having a narrow particle-size distribution range, high purity and high crystallinity. The present invention relates to a process for producing a noble-metal powder and including a step in which an acidic aqueous solution of both one or more noble-metal compounds and a calcium compound is prepared, a step in which the acidic aqueous solution is added to a basic aqueous solution to yield one or more oxides or hydroxides of the noble metal(s) or a mixture of two or more thereof and yield a calcium hydroxide, a step in which the oxides or hydroxides of the noble metal(s) or the mixture is reduced with a reducing agent, and a step in which a solid matter including a reduced form of the noble metal(s) is separated and heat-treated.Type: ApplicationFiled: September 12, 2016Publication date: September 20, 2018Inventors: Takahisa YAMAZAKI, Akio NAGAOKA
-
Publication number: 20180237987Abstract: An ink set for textile printing is disclosed which includes a pretreatment liquid containing a metal salt, a water-dispersible resin (A), an organic solvent (B) having an SP value of 10 to 14 (cal/cm3)1/2 and water, and an ink containing a pigment, a water-dispersible resin (C) having a glass transition point of 10° C. or higher, an organic solvent (D) and water. A method for producing a printed textile item is also disclosed.Type: ApplicationFiled: February 13, 2018Publication date: August 23, 2018Inventors: Yuki URANO, Takahisa YAMAZAKI, Hideki IMANISHI, Shunsuke UOZUMI