Patents by Inventor Hisashi Habashi

Hisashi Habashi 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: 11104137
    Abstract: Provided is a liquid discharging apparatus including a liquid discharging unit configured to discharge a liquid, and a dummy discharge receptacle including an absorbing member configured to absorb a liquid dummy-discharged by the liquid discharging unit, wherein the liquid discharging unit discharges a liquid having a resin content of 5% by mass or greater, and wherein the absorbing member of the dummy discharge receptacle is formed of melamine foam.
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: August 31, 2021
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yuichi Tanioku, Hisashi Habashi, Yuusuke Koizuka, Koji Katsuragi, Yuuki Yokohama, Masaki Kudo
  • Publication number: 20200316945
    Abstract: Provided is a liquid discharging apparatus including a liquid discharging unit configured to discharge a liquid, and a dummy discharge receptacle including an absorbing member configured to absorb a liquid dummy-discharged by the liquid discharging unit, wherein the liquid discharging unit discharges a liquid having a resin content of 5% by mass or greater, and wherein the absorbing member of the dummy discharge receptacle is formed of melamine foam.
    Type: Application
    Filed: March 16, 2020
    Publication date: October 8, 2020
    Inventors: Yuichi Tanioku, Hisashi Habashi, Yuusuke Koizuka, Koji Katsuragi, Yuuki Yokohama, Masaki Kudo
  • Patent number: 10717297
    Abstract: Provided is an ink containing at least: an inorganic pigment having a surface hydrophobicity; resin particles; and water.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: July 21, 2020
    Assignee: RICOH COMPANY, LTD.
    Inventors: Takashi Okada, Tomohiro Inoue, Hisashi Habashi, Masayuki Koyano
  • 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: 10589528
    Abstract: A liquid discharge head including: a flow path formation part in which pressure generation chambers are arranged; and a pressure generation unit configured to apply pressure to the pressure generation chambers, wherein the pressure generation unit is formed by joining a vibration unit to the flow path formation part with a resin layer, and wherein the resin layer includes a curable resin composition including (A) an epoxy resin, (B) a polythiol compound, (C) at least one adhesiveness-imparting agent selected from the group consisting of a compound represented by General Formula (1), a titanium compound represented by General Formula (2-1), and a titanium compound represented by General Formula (2-2), and (D) a curing accelerator.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: March 17, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Tatsuya Sameshima, Hisashi Habashi, Ryota Chiba
  • Patent number: 10563077
    Abstract: Provided is an ink set including at least two inks each including a coloring material, an organic solvent, and water, wherein a proportion of the organic solvent in each of the inks is 30 percent by mass or greater, wherein a relative mobility difference (maximum relative mobility?minimum relative mobility) between a maximum relative mobility and a minimum relative mobility among relative mobilities of the coloring materials included in the inks is 0.1 or greater, where the relative mobilities are obtained by thin-layer chromatography in which the coloring materials are developed using the organic solvents included in the inks as developing solvents.
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: February 18, 2020
    Assignee: Ricoh Company, Ltd.
    Inventor: Hisashi Habashi
  • 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
  • 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
  • Patent number: 10507645
    Abstract: Provided is an inkjet printing apparatus, satisfying elements (1) through (4) below, (1) the inkjet printing apparatus including an ink discharging unit configured to discharge an ink, (2) the ink discharging unit including an inkjet head having a nozzle diameter of 17 ?m or greater but 19 ?m or less, (3) the inkjet head including a nozzle plate and an ink repellent layer disposed on a surface of the nozzle plate, and (4) the inkjet printing apparatus using, as the ink, an aqueous dye ink including a water-soluble dye and having a viscosity of 5 mPa·s or greater but 12 mPa·s or less at 25° C.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: December 17, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Ichiroh Fujii, Hisashi Habashi
  • Publication number: 20190283427
    Abstract: A liquid discharge head including: a flow path formation part in which pressure generation chambers are arranged; and a pressure generation unit configured to apply pressure to the pressure generation chambers, wherein the pressure generation unit is formed by joining a vibration unit to the flow path formation part with a resin layer, and wherein the resin layer includes a curable resin composition including (A) an epoxy resin, (B) a polythiol compound, (C) at least one adhesiveness-imparting agent selected from the group consisting of a compound represented by General Formula (1), a titanium compound represented by General Formula (2-1), and a titanium compound represented by General Formula (2-2), and (D) a curing accelerator.
    Type: Application
    Filed: February 28, 2019
    Publication date: September 19, 2019
    Inventors: Tatsuya SAMESHIMA, Hisashi HABASHI, Ryota CHIBA
  • 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
  • Publication number: 20190048216
    Abstract: Provided is an ink containing at least: an inorganic pigment having a surface hydrophobicity; resin particles; and water.
    Type: Application
    Filed: October 18, 2018
    Publication date: February 14, 2019
    Applicant: RICOH COMPANY, LTD.
    Inventors: Takashi OKADA, Tomohiro INOUE, Hisashi HABASHI, Masayuki KOYANO
  • 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
  • Publication number: 20180346747
    Abstract: Provided is an ink set including at least two inks each including a coloring material, an organic solvent, and water, wherein a proportion of the organic solvent in each of the inks is 30 percent by mass or greater, wherein a relative mobility difference (maximum relative mobility?minimum relative mobility) between a maximum relative mobility and a minimum relative mobility among relative mobilities of the coloring materials included in the inks is 0.1 or greater, where the relative mobilities are obtained by thin-layer chromatography in which the coloring materials are developed using the organic solvents included in the inks as developing solvents.
    Type: Application
    Filed: October 5, 2016
    Publication date: December 6, 2018
    Inventor: Hisashi HABASHI
  • Publication number: 20180319158
    Abstract: Provided is an inkjet printing apparatus, satisfying elements (1) through (4) below, (1) the inkjet printing apparatus including an ink discharging unit configured to discharge an ink, (2) the ink discharging unit including an inkjet head having a nozzle diameter of 17 ?m or greater but 19 ?m or less, (3) the inkjet head including a nozzle plate and an ink repellent layer disposed on a surface of the nozzle plate, and (4) the inkjet printing apparatus using, as the ink, an aqueous dye ink including a water-soluble dye and having a viscosity of 5 mPa·s or greater but 12 mPa·s or less at 25° C.
    Type: Application
    Filed: July 13, 2018
    Publication date: November 8, 2018
    Inventors: Ichiroh Fujii, Hisashi Habashi
  • 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: 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
  • Patent number: 9868288
    Abstract: A cleaning liquid for an inkjet recording apparatus is provided. The cleaning liquid includes an organic solvent having a boiling point of less than 250° C. and no organic solvent having a boiling point of 250° C. or more. The organic solvent having a boiling point of less than 250° C. includes two or more methoxy-group-containing organic solvents and at least one of 1,2-propanediol, 1,3-propanediol, 1,2-butanediol, and 2,3-butanediol.
    Type: Grant
    Filed: July 5, 2016
    Date of Patent: January 16, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventors: Hidefumi Nagashima, Naohiro Toda, Juichi Furukawa, Masahiro Kido, Takashi Tamai, Ichiroh Fujii, Hisashi Habashi
  • Publication number: 20170349772
    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: Application
    Filed: June 5, 2017
    Publication date: December 7, 2017
    Inventors: Tomohiro HIRADE, Hisashi HABASHI
  • Patent number: 9757944
    Abstract: Provided is a liquid jet head, including a flow path including a first member, a resin layer, and a second member, wherein the resin layer contains a cured product of a resin composition containing an epoxy compound represented by General Formula (1), a polythiol compound having 2 or more thiol groups in a molecule thereof, and a specific imidazole compound, where in General Formula (1), L is an integer of 0 or greater but less than 3, m is a positive number of 0.1 or greater but less than 50, R1 represents any one of a hydrogen atom, and an alkyl group having 1 to 4 carbon atoms, and R2 represents a substituent represented by a formula below where R3 and R4 each represent any one of hydrogen atom, and a non-substituted or fluorine-substituted methyl group, and n is an integer of 4 to 12.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: September 12, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Daisuke Takagi, Hisashi Habashi, Tomoyuki Aratani, Tatsuya Sameshima, Ryo Ogawa, Takuya Matsuda