Patents by Inventor Yoshimasa Miyazawa

Yoshimasa Miyazawa 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: 11504992
    Abstract: An image forming method is provided. The image forming method includes the processes of: applying a porous layer forming material to a recording medium by an inkjet head to form a porous layer having an average pore diameter greater than 200 nm and not greater than 400 nm and an average thickness of from 5 to 30 ?m; and applying a silver ink containing silver to the porous layer.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: November 22, 2022
    Assignee: RICOH COMPANY, LTD.
    Inventors: Tatsuya Tomura, Yoshimasa Miyazawa, Takuya Fujita
  • Publication number: 20220220327
    Abstract: A colored dispersion that contains (A) C.I. Disperse Orange 25, (B) a specific dye such as C.I. Disperse Orange 49, 62, 71, 73, or 148, and water. When the total (A) C.I. Disperse Orange 25 and (B) specific dye content of the colored dispersion is 100 parts by mass, the (B) specific dye content of the colored dispersion is less than 20 parts by mass. A recording medium to which the colored dispersion has been adhered and a textile printing method for hydrophobic fibers that uses the colored dispersion.
    Type: Application
    Filed: May 19, 2020
    Publication date: July 14, 2022
    Inventors: Takahiro MATSUMOTO, Yuta HAGIWARA, Yoshimasa MIYAZAWA, Yuki TANAKA
  • Publication number: 20220204786
    Abstract: A colored dispersion that contains (A) a dye derivative, (B) a water-insoluble dye, (C) a dispersant, and water. The (A) component contains an anthraquinone-based compound represented by formula (al), the (C) component does not contain a polyoxyethylene aryl phenyl ether and a polyoxyethylene aryl phenyl ether sulfate at the same time, and the mass ratio ((B)/(A)) of the (B) component with respect to the (A) component satisfies the relationship 400>(B)/(A)>3.125. A recording medium having the colored dispersion adhered thereto and a hydrophobic fiber printing method using the colored dispersion. In formula (a1), each of Ra1-Ra5 is a hydrogen atom, and Xa1 is a group represented by formula (a4).
    Type: Application
    Filed: March 31, 2020
    Publication date: June 30, 2022
    Inventors: Akitsu HANAZATO, Yoshimasa MIYAZAWA, Takashi YOSHIMOTO, Makoto TERANISHI
  • Publication number: 20220195225
    Abstract: A colored dispersion that contains (A) a dye derivative, (B) a water-insoluble dye, (C) a dispersant, and water. The (A) component contains an anthraquinone-based compound represented by formula (a1), the (C) component contains a polyoxyethylene aryl phenyl ether and a polyoxyethylene aryl phenyl ether sulfate, and the mass ratio ((B)/(A)) of the (B) component with respect to the (A) component satisfies the relationship 400>(B)/(A)>3.125. A recording medium having the colored dispersion adhered thereto and a hydrophobic fiber printing method using the colored dispersion. In formula (a1), each of Ra1-Ra5 is a hydrogen atom, and Xa1 is a group represented by formula (a4).
    Type: Application
    Filed: March 31, 2020
    Publication date: June 23, 2022
    Inventors: Akitsu HANAZATO, Yoshimasa MIYAZAWA, Takashi YOSHIMOTO, Makoto TERANISHI
  • Publication number: 20220195224
    Abstract: A dispersion liquid composition for ink containing a non-water-soluble coloring agent, a water-soluble polysaccharide compound, a multivalent metal salt, a dispersant, and water; and an ink composition containing the dispersion liquid composition for ink. An ink-jet printing method using the ink composition, an ink-jet printed article printed by the ink-jet printing method, a sublimation transfer dyeing method using the ink-jet printed article, and a sublimation transfer dyed article dyed by the sublimation transfer dyeing method.
    Type: Application
    Filed: February 17, 2020
    Publication date: June 23, 2022
    Inventors: Keijyou SASAKI, Yoshimasa MIYAZAWA, Akitsu HANAZATO, Hiroko HIGUCHI
  • Publication number: 20210268819
    Abstract: A pretreatment liquid containing a multivalent metal salt, a cationized guar gum, and water, and an image forming method using the pretreatment liquid. The pretreatment liquid is applied to recording media before an aqueous color ink containing colorant is applied to the recording media.
    Type: Application
    Filed: July 22, 2019
    Publication date: September 2, 2021
    Inventors: Tsukasa KAGAWA, Yoshimasa MIYAZAWA, Ha SAI
  • Patent number: 10703911
    Abstract: Organic colorant represented by General Formula (1) below: where in the General Formula (1), R1 and R2 each independently represent C1-C20 alkyl group, C1-C20 alkenyl group, phenyl group, naphthyl group, or group represented by —(CH2)n—COO—R3, —(CH2)n—R4, —(CH2)n—CONH—R5, —CR6R7—COO—R8, or —(CH2)n—OCOCH3; R3 represents hydrogen atom or C1-C2 alkyl group; R4 represents hydroxy group, C1-C2 alkoxy group, C2-C5 alkenyloxy group, SO3Na group, OSO3Na group, phenyl group, phenylalkyl group, naphthyl group, or naphthylalkyl group; R5 represents C1-C20 alkyl group, C1-C20 alkenyl group, or C1-C12 hydroxyalkyl group; R6 represents hydrogen atom or methyl group; R7 represents C1-C4 alkyl group; R8 represents C1-C5 alkyl group; and n is integer of from 1 to 12.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: July 7, 2020
    Assignees: Ricoh Company, Ltd., Tokyo University of Science Foundation
    Inventors: Takuya Fujita, Yoshimasa Miyazawa, Tatsuya Tomura, Masahiro Yanagisawa, Kiyofumi Nagai, Yukishige Kondo, Juki Migii
  • Patent number: 10655029
    Abstract: An inkjet ink including: a stilbene-based compound represented by General Formula (1) below; where in the General Formula (1), R1 and R3 each independently represent, for example, an alkyl group including 1 to 20 carbon atoms, an alkenyl group including 1 to 20 carbon atoms, a phenyl group, or a naphthyl group.
    Type: Grant
    Filed: October 3, 2017
    Date of Patent: May 19, 2020
    Assignees: Ricoh Company, Ltd., Tokyo University of Science Foundation
    Inventors: Takuya Fujita, Yoshimasa Miyazawa, Hisashi Habashi, Tatsuya Tomura, Tomohiro Inoue, Yukishige Kondo, Yutaka Takahashi
  • Patent number: 10300706
    Abstract: An inkjet printing device includes an ink containing a silver particle and water; and an ink discharging head including multiple nozzles to discharge the ink, individual liquid chambers communicating with the multiple nozzles, a common liquid chamber to supply the ink to the individual liquid chambers, a circulating flow path communicating with the individual liquid chambers, a common circulating liquid chamber communicating with the circulating flow path, and a pressure generator to apply a pressure to the ink in the individual liquid chambers, wherein the proportion of the silver particle to the ink is from 1 to 15 percent by mass.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: May 28, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshimasa Miyazawa, Tatsuya Tomura, Takuya Fujita, Hisashi Habashi, Takahiro Yoshida
  • Patent number: 10293627
    Abstract: A printed matter is provided. The printed matter includes a porous printing medium and a printed layer. The printed layer contains silver and has a printed surface having an image clarity (2 mm), defined in Japanese Industrial Standards H8686-2, of 5.0 or more and a b* value in the range of from ?7.0 to +4.0.
    Type: Grant
    Filed: August 11, 2017
    Date of Patent: May 21, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Tatsuya Tomura, Yoshimasa Miyazawa, Takuya Fujita
  • Patent number: 10202516
    Abstract: A printed matter is provided. The printed matter comprises a print medium and a print layer on the print medium. The print medium comprises a porous layer having an average pore diameter of from 100 to 400 nm and an average thickness of from 1 to 50 ?m. The print layer comprises silver and an aliphatic compound having amino group and hydroxyl group, and has an average thickness of from 50 to 300 nm.
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: February 12, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Tatsuya Tomura, Yoshimasa Miyazawa, Takuya Fujita
  • Publication number: 20190030940
    Abstract: An image forming method is provided. The image forming method includes the processes of: applying a porous layer forming material to a recording medium by an inkjet head to form a porous layer having an average pore diameter greater than 200 nm and not greater than 400 nm and an average thickness of from 5 to 30 ?m; and applying a silver ink containing silver to the porous layer.
    Type: Application
    Filed: July 24, 2018
    Publication date: January 31, 2019
    Inventors: Tatsuya TOMURA, Yoshimasa MIYAZAWA, Takuya FUJITA
  • Publication number: 20190010331
    Abstract: Organic colorant represented by General Formula (1) below: where in the General Formula (1), R1 and R2 each independently represent C1-C20 alkyl group, C1-C20 alkenyl group, phenyl group, naphthyl group, or group represented by —(CH2)n—COO—R3, —(CH2)n—R4, —(CH2)n—CONH—R5, —CR6R7—COO—R8, or —(CH2)n—OCOCH3; R3 represents hydrogen atom or C1-C2 alkyl group; R4 represents hydroxy group, C1-C2 alkoxy group, C2-C5 alkenyloxy group, SO3Na group, OSO3Na group, phenyl group, phenylalkyl group, naphthyl group, or naphthylalkyl group; R5 represents C1-C20 alkyl group, C1-C20 alkenyl group, or C1-C12 hydroxyalkyl group; R6 represents hydrogen atom or methyl group; R7 represents C1-C4 alkyl group; R8 represents C1-C5 alkyl group; and n is integer of from 1 to 12.
    Type: Application
    Filed: July 5, 2018
    Publication date: January 10, 2019
    Inventors: Takuya Fujita, Yoshimasa Miyazawa, Tatsuya Tomura, Masahiro Yanagisawa, Kiyofumi Nagai, Yukishige Kondo, Juki Migii
  • Publication number: 20180178538
    Abstract: An inkjet printing device includes an ink containing a silver particle and water; and an ink discharging head including multiple nozzles to discharge the ink, individual liquid chambers communicating with the multiple nozzles, a common liquid chamber to supply the ink to the individual liquid chambers, a circulating flow path communicating with the individual liquid chambers, a common circulating liquid chamber communicating with the circulating flow path, and a pressure generator to apply a pressure to the ink in the individual liquid chambers, wherein the proportion of the silver particle to the ink is from 1 to 15 percent by mass.
    Type: Application
    Filed: December 22, 2017
    Publication date: June 28, 2018
    Inventors: Yoshimasa MIYAZAWA, Tatsuya Tomura, Takuya Fujita, Hisashi Habashi, Takahiro Yoshida
  • Publication number: 20180118966
    Abstract: A printed matter is provided. The printed matter comprises a print medium and a print layer on the print medium. The print medium comprises a porous layer having an average pore diameter of from 100 to 400 nm and an average thickness of from 1 to 50 ?m. The print layer comprises silver and an aliphatic compound having amino group and hydroxyl group, and has an average thickness of from 50 to 300 nm.
    Type: Application
    Filed: October 16, 2017
    Publication date: May 3, 2018
    Inventors: Tatsuya TOMURA, Yoshimasa Miyazawa, Takuya Fujita
  • Publication number: 20180094155
    Abstract: An inkjet ink including: a stilbene-based compound represented by General Formula (1) below; where in the General Formula (1), R1 and R3 each independently represent, for example, an alkyl group including 1 to 20 carbon atoms, an alkenyl group including 1 to 20 carbon atoms, a phenyl group, or a naphthyl group.
    Type: Application
    Filed: October 3, 2017
    Publication date: April 5, 2018
    Inventors: Takuya FUJITA, Yoshimasa MIYAZAWA, Hisashi HABASHI, Tatsuya TOMURA, Tomohiro INOUE, Yukishige KONDO, Yutaka TAKAHASHI
  • Publication number: 20180056692
    Abstract: A printed matter is provided. The printed matter includes a porous printing medium and a printed layer. The printed layer contains silver and has a printed surface having an image clarity (2 mm), defined in Japanese Industrial Standards H8686-2, of 5.0 or more and a b* value in the range of from ?7.0 to +4.0.
    Type: Application
    Filed: August 11, 2017
    Publication date: March 1, 2018
    Inventors: Tatsuya Tomura, Yoshimasa Miyazawa, Takuya Fujita