Patents by Inventor Juichi Furukawa

Juichi Furukawa 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: 10399363
    Abstract: A print method includes applying a first ink to a recording medium to form a first ink print layer, drying the first ink print layer to a drying ratio of 30 percent or less, and applying a second ink having a color different from that of the first ink to the first ink print layer to form a second ink print layer thereon, wherein the first ink includes a urethane resin particle and a water-soluble organic solvent having a boiling point of from 100 to 180 degrees C. or ?-alkoxy propionamide of Chemical formula I, where R1 represents a methyl group, an ethyl group, a propyl group, or a butyl group and R2 and R3 each, independently represent alkyl groups having one to six carbon atoms, and the first ink and the second ink includes no organic solvent having a boiling point of 280 degrees C. or higher under 1 atm.
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: September 3, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Juichi Furukawa, Masaaki Tsuda, Hidefumi Nagashima, Yukihiro Imanaga, Masahiro Kido, Hikaru Kobayashi, Yuta Nakamura
  • Patent number: 10259965
    Abstract: A surface treatment liquid composition for a substrate includes a nonionic resin particle and a multivalent metal salt.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: April 16, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomohiro Nakagawa, Noriaki Okada, Atsufumi Hanazawa, Juichi Furukawa, Satoyuki Sekiguchi, Yukihiro Imanaga, Ayaka Tanaka
  • Publication number: 20190092956
    Abstract: An image forming method for forming an image on a non-absorbable substrate includes (a) applying a surface processing composition including water, a first organic solvent, and a urethane resin particle to the non-absorbable substrate, (b) applying a non-white ink including water, a second organic solvent, and a second acrylic resin particle and (c) applying a white ink including water, a third organic solvent, a third acrylic resin particle, and a white colorant.
    Type: Application
    Filed: September 20, 2018
    Publication date: March 28, 2019
    Inventors: Yukihiro Imanaga, TOMOHIRO NAKAGAWA, JUICHI FURUKAWA, SATOYUKI SEKIGUCHI, AYAKA TANAKA
  • Publication number: 20180320011
    Abstract: Provided is an ink including water, organic solvents, a color material, and resin particles, wherein the ink is used in a printing method including applying the ink onto a substrate including a resin to print, and the organic solvents include a compound, a diol compound including 3 or 4 carbon atoms, and 2-ethylhexyl alcohol, where the compound has a boiling point of 170° C. or higher and an absolute value of a difference between Fh of the compound represented by Mathematical Formula 1 and Fh of the resin in the substrate represented by Mathematical Formula 1 is 5% or less, Fh(%)=[?H/(?D+?P+?H)]×100??<Mathematical Formula 1> where, in Mathematical Formula 1, ?H is a hydrogen bond term of the Hansen solubility parameter, ?D is a dispersion term of the Hansen solubility parameter, and ?P is a polarity term of the Hansen solubility parameter.
    Type: Application
    Filed: July 10, 2018
    Publication date: November 8, 2018
    Inventors: Masahiro KIDO, Juichi Furukawa, Hidefumi Nagashima, Yukihiro Imanaga
  • Patent number: 10119042
    Abstract: An ink including: water; at least one organic solvent; a polysiloxane surfactant; and acryl-silicone resin particles, where the polysiloxane surfactant has an HLB value of 8 or less.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: November 6, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Masahiro Kido, Juichi Furukawa, Hidefumi Nagashima, Yuta Nakamura, Masaaki Tsuda, Hikaru Kobayashi, Yukihiro Imanaga, Michihiko Namba, Hiroaki Takahashi, Takahiro Yoshida
  • Patent number: 9982151
    Abstract: An aqueous ink for inkjet includes water, at least one hydrosoluble organic solvent each having a boiling point of 250° C. or lower; vinyl polymer particles containing a pigment, and polycarbonate-based urethane resin particles, wherein the aqueous ink for inkjet is used for an inkjet recording system including a heating step.
    Type: Grant
    Filed: January 16, 2017
    Date of Patent: May 29, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventors: Hidefumi Nagashima, Naohiro Toda, Tomohiro Nakagawa, Juichi Furukawa, Ichiroh Fujii
  • Publication number: 20180127610
    Abstract: Provided is an ink containing water, a plurality of organic solvents, a color material, and resin particles, wherein the plurality of organic solvents contain at least one compound having a hydrogen bond term ?H, which is a Hansen solubility parameter, of 4.1 MPa1/2 or higher but 9.5 MPa1/2 or lower and a boiling point of 170° C. or higher and at least one diol compound containing 3 or 4 carbon atoms.
    Type: Application
    Filed: June 3, 2016
    Publication date: May 10, 2018
    Inventors: Masahiro KIDO, Hidefumi NAGASHIMA, Juichi FURUKAWA, Yuta NAKAMURA
  • 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: 20180001669
    Abstract: A print method includes applying a first ink to a recording medium to form a first ink print layer, drying the first ink print layer to a drying ratio of 30 percent or less, and applying a second ink having a color different from that of the first ink to the first ink print layer to form a second ink print layer thereon, wherein the first ink includes a urethane resin particle and a water-soluble organic solvent having a boiling point of from 100 to 180 degrees C. or ?-alkoxy propionamide of Chemical formula I, where R1 represents a methyl group, an ethyl group, a propyl group, or a butyl group and R2 and R3 each, independently represent alkyl groups having one to six carbon atoms, and the first ink and the second ink includes no organic solvent having a boiling point of 280 degrees C. or higher under 1 atm.
    Type: Application
    Filed: June 27, 2017
    Publication date: January 4, 2018
    Inventors: Juichi FURUKAWA, Masaaki Tsuda, Hidefumi Nagashima, Yukihiro Imanaga, Masahiro Kido, Hikaru Kobayashi, Yuta Nakamura
  • Patent number: 9856386
    Abstract: An inkjet ink set is provided. The inkjet ink set includes a first ink including a resin A and an organic solvent A; and a second ink including a resin B and an organic solvent which is the same as or different from the organic solvent A. The minimum film forming temperature (MFT) of the resin A is lower than that of the resin B.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: January 2, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Masahiro Kido, Naohiro Toda, Tomohiro Nakagawa, Juichi Furukawa, Hidefumi Nagashima, Hikaru Kobayashi
  • Patent number: 9855763
    Abstract: An ink for inkjet includes water; two or more hydrosoluble organic solvents; a pigment; and a resin particle more than the pigment by weight. A hydrosoluble organic solvent A having the smallest SP value and a hydrosoluble organic solvent B having the largest SP among the two or more hydrosoluble organic solvents satisfy the following relations (1) and (2): SP value of hydrosoluble organic solvent B?SP value of hydrosoluble organic solvent A?3??(1) boiling point of hydrosoluble organic solvent B>boiling point of hydrosoluble organic solvent A??(2).
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: January 2, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Naohiro Toda, Tomohiro Nakagawa, Hidefumi Nagashima, Juichi Furukawa, Masahiro Kido, Hikaru Kobayashi
  • Publication number: 20170247561
    Abstract: A surface treatment liquid composition for a substrate includes a nonionic resin particle and a multivalent metal salt.
    Type: Application
    Filed: February 17, 2017
    Publication date: August 31, 2017
    Inventors: Tomohiro NAKAGAWA, Noriaki OKADA, Atsufumi HANAZAWA, Juichi FURUKAWA, Satoyuki SEKIGUCHI, Yukihiro IMANAGA, Ayaka TANAKA
  • Publication number: 20170174919
    Abstract: An ink including: water; at least one organic solvent; a polysiloxane surfactant; and acryl-silicone resin particles, where the polysiloxane surfactant has an HLB value of 8 or less.
    Type: Application
    Filed: December 16, 2016
    Publication date: June 22, 2017
    Inventors: Masahiro KIDO, Juichi FURUKAWA, Hidefumi NAGASHIMA, Yuta NAKAMURA, Masaaki TSUDA, Hikaru KOBAYASHI, Yukihiro IMANAGA, Michihiko NAMBA, Hiroaki TAKAHASHI, Takahiro YOSHIDA
  • Patent number: 9663668
    Abstract: An inkjet ink, containing: water; a water-soluble organic solvent; a pigment; and polycarbonate urethane resin particles, wherein the water-soluble organic solvent contains 50% by mass or more of a diol compound, and wherein the water-soluble organic solvent contains 50% by mass or more of a water-soluble organic solvent having a boiling point of 200° C. or less.
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: May 30, 2017
    Assignee: Rioch Company, Ltd.
    Inventors: Tomohiro Nakagawa, Naohiro Toda, Hidefumi Nagashima, Ichiroh Fujii, Juichi Furukawa
  • Publication number: 20170121545
    Abstract: An aqueous ink for inkjet includes water, at least one hydrosoluble organic solvent each having a boiling point of 250° C. or lower; vinyl polymer particles containing a pigment, and polycarbonate-based urethane resin particles, wherein the aqueous ink for inkjet is used for an inkjet recording system including a heating step.
    Type: Application
    Filed: January 16, 2017
    Publication date: May 4, 2017
    Applicant: RICOH COMPANY, LTD.
    Inventors: Hidefumi NAGASHIMA, Naohiro Toda, Tomohiro Nakagawa, Juichi Furukawa, Ichiroh Fujii
  • Patent number: 9605173
    Abstract: An ink contains a colorant, a water soluble organic solvent, a silicone-based surfactant, a compound represented by the following chemical formula 1, and water, wherein the water soluble organic solvent having a boiling point of 250° C. or higher accounts for 38% by weight or less in a total amount of the water soluble organic solvent, where R11 and R12 each, independently represent aliphatic hydrocarbon groups having 3 to 6 carbon atoms with forks and R13 and R14 each, independently represent alkyl groups having one to two carbon atoms, and n represents an integer of from 1 to 6.
    Type: Grant
    Filed: June 5, 2015
    Date of Patent: March 28, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Ichiroh Fujii, Naohiro Toda, Tomohiro Nakagawa, Hidefumi Nagashima, Juichi Furukawa, Hikaru Kobayashi
  • Patent number: 9587124
    Abstract: An aqueous ink for inkjet includes water, at least one hydrosoluble organic solvent each having a boiling point of 250° C. or lower; vinyl polymer particles containing a pigment, and polycarbonate-based urethane resin particles, wherein the aqueous ink for inkjet is used for an inkjet recording system including a heating step.
    Type: Grant
    Filed: January 5, 2015
    Date of Patent: March 7, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Hidefumi Nagashima, Naohiro Toda, Tomohiro Nakagawa, Juichi Furukawa, Ichiroh Fujii
  • Publication number: 20170015102
    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: Application
    Filed: July 5, 2016
    Publication date: January 19, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Hidefumi NAGASHIMA, Naohiro TODA, Juichi FURUKAWA, Masahiro KIDO, Takashi TAMAI, Ichiroh FUJII, Hisashi HABASHI
  • Patent number: 9493665
    Abstract: An ink set for inkjet contains a white ink and one or more color inks other than the white ink, wherein the ink set satisfies the following I to III: I. each ink comprises water, a pigment, resin particulates, a water soluble organic solvent, and a silicone-based surfactant accounting for 1% by weight to 3% by weight of the ink, II. the pigment contained in each of the one or more color inks is a reformed pigment reformed by at least one of a geminal bisphosphonic acid group or a geminal bisphosphonic acid salt group, and III. the water soluble organic solvent of the white ink comprises glycol ether having a boiling point of from 200 degrees C. to 250 degrees C.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: November 15, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Naohiro Toda, Juichi Furukawa, Hidefumi Nagashima, Tomohiro Nakagawa, Hikaru Kobayashi
  • Patent number: 9493001
    Abstract: An inkjet recording method includes ejecting an ink having a temperature from 28° C. to 40° C. and attaching the ink to a non-porous substrate having a temperature 5° C. to 20° C. higher than that of the ink, wherein the ink contains a colorant, resin particles, water, a hydrosoluble organic solvent, and a silicone-based surfactant, wherein the silicone-based surfactant accounts for 1% by weight to 3% by weight in the ink.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: November 15, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Naohiro Toda, Hidefumi Nagashima, Tomohiro Nakagawa, Juichi Furukawa, Ichiroh Fujii