Patents by Inventor Tomohiro HIRADE

Tomohiro HIRADE 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).

  • Publication number: 20240102237
    Abstract: An inkjet recording method is provided that includes the following steps: applying a pretreatment liquid to a fabric; applying a first white ink by an inkjet method and a wet on wet method onto an application region of the pretreatment liquid obtained in the applying of the pretreatment liquid, to form an image; applying a second white ink by an inkjet method and a wet on wet method onto the image formed in the applying of the first white ink; and applying a color ink by an inkjet method and a wet on wet method onto an image obtained in the applying of the second white ink.
    Type: Application
    Filed: September 5, 2023
    Publication date: March 28, 2024
    Applicant: Ricoh Company, Ltd.
    Inventors: Makoto Kuronuma, Toshiyuki Kobashi, Tomohiro Hirade
  • Patent number: 11851569
    Abstract: Provided is an ink including water, an organic solvent, resin particles, a first inorganic pigment, and a second inorganic pigment. The first inorganic pigment comprises particulate titanium oxide. The second inorganic pigment comprises at least one selected from the group consisting of acicular titanium oxide, fusiform titanium oxide, and silica particles.
    Type: Grant
    Filed: March 23, 2021
    Date of Patent: December 26, 2023
    Assignee: RICOH COMPANY, LTD.
    Inventors: Tomohiro Hirade, Masaki Kudo, Mio Akima
  • Publication number: 20230193065
    Abstract: A printing method contains applying a processing fluid to a fabric and applying an ink to the fabric to which the processing fluid has been applied, wherein the ink contains a pigment, a resin having a cross-linkable functional group, a pH regulator, and at least one member selected from a block isocyanate compound, a carbodiimide compound, and a polymer having an oxazoline group.
    Type: Application
    Filed: December 14, 2022
    Publication date: June 22, 2023
    Applicant: Ricoh Company, Ltd.
    Inventors: Tomohiro HIRADE, Toshiyuki Kobashi, Makoto Kuronuma
  • Publication number: 20230120554
    Abstract: An ink set includes a white ink and a color ink. The white ink and the color ink each independently include water-dispersible resin particles, and a blocked isocyanate compound. A resin of the water-dispersible resin particles includes a crosslinkable functional group. The blocked isocyanate compound includes a functional group that can crosslink with the resin of the water-dispersible resin particles. An absolute value of a difference in static surface tension between the white ink and the color ink at 25° C. is 1.0 mN/m or less. Absolute values of differences in dynamic surface tension between the white ink and the color ink at 25° C. with bubble lifetime of 15 msec, a bubble lifetime of 150 msec, and a bubble lifetime of 1,500 msec are each independently 1.0 mN/m or less. The bubble lifetime is measured according to the maximum bubble pressure method.
    Type: Application
    Filed: September 14, 2022
    Publication date: April 20, 2023
    Applicant: Ricoh Company, Ltd.
    Inventors: Hiroshi Gotou, Toshiyuki Kobashi, Tomohiro Hirade, Daisuke Ozaki
  • Publication number: 20220403594
    Abstract: A print method includes applying a first processing fluid comprising water and a lubricant to a fabric, applying a second processing fluid comprising water and a flocculant to the fabric, and applying an ink to the region of the fabric where the first processing fluid and the second processing fluid have been applied.
    Type: Application
    Filed: June 16, 2022
    Publication date: December 22, 2022
    Inventors: Tomohiro HIRADE, Makoto KURONUMA
  • Patent number: 11472974
    Abstract: An active-energy-ray-curable composition, which satisfies the following relationships of absorbance: a ratio of absorbance at a wavelength of 400 nm to absorbance at a wavelength of 750 nm is 1.4 or more but 1.6 or less; and a ratio of absorbance at a wavelength of 365 nm to absorbance at a wavelength of 500 nm is 1.2 or less.
    Type: Grant
    Filed: December 27, 2019
    Date of Patent: October 18, 2022
    Assignee: RICOH COMPANY, LTD.
    Inventors: Tsuyoshi Asami, Tomohiro Hirade
  • Publication number: 20220024220
    Abstract: A processing liquid contains a nonionic resin, a resin particle having a carboxylic acid group, a flocculant, an organic solvent, and water.
    Type: Application
    Filed: July 21, 2021
    Publication date: January 27, 2022
    Inventors: Masaki KUDO, Tomohiro HIRADE, Mio AKIMA
  • Patent number: 11193028
    Abstract: A curable composition containing a magenta pigment; a polymerizable compound; and a polymer including an amino group, where the polymer including the amino group has a weight average molecular weight of 1,000 or more, wherein the polymer including the amino group is at least one selected from the group consisting of hydroxyl group-including carboxylate ester, salts of a long-chain polyamino amide and acid ester having a high molecular weight, salts of polycarboxylic acid having a high molecular weight, salts of long-chain polyaminoamide and polar acid ester, unsaturated acid esters having a high molecular weight, modified polyurethanes, modified polyacrylates, polyether ester anionic surfactants, salts of naphthalenesulfonic acid formalin condensates, polyoxyethylene alkyl phosphoric acid ester, polyoxyethylene nonylphenylether, polyester polyamine, and stearylamine acetate.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: December 7, 2021
    Assignee: RICOH COMPANY, LTD
    Inventors: Tomohiro Hirade, Tsuyoshi Asami
  • Publication number: 20210363369
    Abstract: Provided is an ink including water, an organic solvent, resin particles, and a thickener. The thickener comprises polymer particles having a carboxylic acid structure. A proportion of the thickener in the ink is 0.05% by mass or more. Change in viscosity of the ink between before and after storage of the ink at 70° C. for 1 week is 20% or less. The change in viscosity is expressed by Formula (1): Change in viscosity (%)=[(a?b)/b]×100 . . . Formula (1), where a represents a viscosity (mPa·s) at 25° C. of the ink when the ink is prepared, and b represents a viscosity (mPa·s) at 25° C. of the ink after the ink is stored at 70° C. for 1 week.
    Type: Application
    Filed: May 10, 2021
    Publication date: November 25, 2021
    Inventors: Mio AKIMA, Masaki KUDO, Tomohiro HIRADE, Nozomi TERAI
  • Publication number: 20210301156
    Abstract: Provided is an ink including water, an organic solvent, resin particles, a first inorganic pigment, and a second inorganic pigment. The first inorganic pigment comprises particulate titanium oxide. The second inorganic pigment comprises at least one selected from the group consisting of acicular titanium oxide, fusiform titanium oxide, and silica particles.
    Type: Application
    Filed: March 23, 2021
    Publication date: September 30, 2021
    Inventors: Tomohiro HIRADE, Masaki KUDO, Mio AKIMA
  • Patent number: 11001075
    Abstract: A printing method includes discharging a first white ink comprising a first white pigment and a second white ink containing a second white pigment by a discharging head, wherein the following relationship is satisfied: |RA?RB|?0.5, where RA represents a refractive index of the first white pigment and RB represents a refractive index of the second white pigment.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: May 11, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroshi Gotou, Tomohiro Hirade
  • Publication number: 20200199384
    Abstract: A curable composition containing a magenta pigment; a polymerizable compound; and a polymer including an amino group, where the polymer including the amino group has a weight average molecular weight of 1,000 or more, wherein the polymer including the amino group is at least one selected from the group consisting of hydroxyl group-including carboxylate ester, salts of a long-chain polyamino amide and acid ester having a high molecular weight, salts of polycarboxylic acid having a high molecular weight, salts of long-chain polyaminoamide and polar acid ester, unsaturated acid esters having a high molecular weight, modified polyurethanes, modified polyacrylates, polyether ester anionic surfactants, salts of naphthalenesulfonic acid formalin condensates, polyoxyethylene alkyl phosphoric acid ester, polyoxyethylene nonylphenylether, polyester polyamine, and stearylamine acetate.
    Type: Application
    Filed: February 20, 2020
    Publication date: June 25, 2020
    Inventors: Tomohiro HIRADE, Tsuyoshi ASAMI
  • Publication number: 20200131382
    Abstract: An active-energy-ray-curable composition, which satisfies the following relationships of absorbance: a ratio of absorbance at a wavelength of 400 nm to absorbance at a wavelength of 750 nm is 1.4 or more but 1.6 or less; and a ratio of absorbance at a wavelength of 365 nm to absorbance at a wavelength of 500 nm is 1.2 or less.
    Type: Application
    Filed: December 27, 2019
    Publication date: April 30, 2020
    Inventors: Tsuyoshi ASAMI, Tomohiro HIRADE
  • Patent number: 10604666
    Abstract: An active-energy-ray-curable composition including: a magenta pigment; a polymerizable compound; and a pigment adsorption component, an amount of the pigment adsorption component (A0) adsorbed onto 100 mg of the magenta pigment being from 10 mg through 60 mg.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: March 31, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomohiro Hirade, Tsuyoshi Asami
  • Patent number: 10544321
    Abstract: An ink includes a volatile solvent, an inorganic hollow particle, and a calcium ion, wherein the calcium ion has a proportion of from 0.5 to 250 ppm in the ink and the inorganic hollow particle has a 50 percent cumulative particle diameter of from 50 to 350 nm.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: January 28, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomohiro Hirade, Hisashi Habashi
  • Publication number: 20200023648
    Abstract: A printing method includes discharging a first white ink comprising a first white pigment and a second white ink containing a second white pigment by a discharging head, wherein the following relationship is satisfied: |RA?RB|?0.5, where RA represents a refractive index of the first white pigment and RB represents a refractive index of the second white pigment.
    Type: Application
    Filed: July 18, 2019
    Publication date: January 23, 2020
    Inventors: Hiroshi Gotou, Tomohiro Hirade
  • Patent number: 10519330
    Abstract: An ink contains a volatile solvent, a pigment including an inorganic hollow particle having a spherical form, and a resin particle.
    Type: Grant
    Filed: July 30, 2018
    Date of Patent: December 31, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomohiro Hirade, Hisashi Habashi
  • Publication number: 20190169448
    Abstract: An active energy ray curable composition is provided. The active energy ray curable composition includes a pigment including a titanium oxide, a dispersant, and a polymerizable compound. At least a part of the dispersant is adsorbed to the pigment at an adsorption rate of from 5 to 80 mg per 1 g of the pigment.
    Type: Application
    Filed: February 8, 2019
    Publication date: June 6, 2019
    Inventors: Tsuyoshi ASAMI, Tomohiro HIRADE
  • Publication number: 20190031897
    Abstract: An ink contains a volatile solvent, a pigment including an inorganic hollow particle having a spherical form, and a resin particle.
    Type: Application
    Filed: July 30, 2018
    Publication date: January 31, 2019
    Inventors: Tomohiro Hirade, Hisashi Habashi
  • Patent number: 9969894
    Abstract: An active-energy-ray-curable composition including: a cyan pigment; and a polymerizable compound, wherein a ratio of absorbance at a wavelength of 385 nm to absorbance at a wavelength of 620 nm is 0.65 or less.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: May 15, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomohiro Hirade, Tsuyoshi Asami