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: 11098216
    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: Grant
    Filed: September 20, 2018
    Date of Patent: August 24, 2021
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yukihiro Imanaga, Tomohiro Nakagawa, Juichi Furukawa, Satoyuki Sekiguchi, Ayaka Tanaka
  • Publication number: 20210237454
    Abstract: An image recording method is provided. The image recording method includes the steps of: applying a treatment liquid containing a pore forming material onto a recording medium to form a porous layer; and applying a metallic ink containing a metallic pigment onto the porous layer. A surface tension of the metallic ink at 23° C. is equal to or greater than a surface tension of the treatment liquid at 23° C. The surface tension of the metallic ink at 23° C. is 19 mN/m or more and 28 mN/m or less.
    Type: Application
    Filed: January 27, 2021
    Publication date: August 5, 2021
    Applicant: Ricoh Company, Ltd.
    Inventors: Juichi Furukawa, Tatsuya Tomura
  • Patent number: 11041082
    Abstract: An image forming method comprises applying a white ink containing a metal oxide having a number average particle diameter of from 200 to 700 nm and a polymer to a recording medium and applying a glittery ink containing a glittery pigment to an area on the recording medium where the white ink has been applied, wherein the following relation 1 is satisfied: 0.6?Vp/(Vp+Ve) ??Relation 1, where Vp represents a volume of the metal oxide in the white ink and Ve represents a volume of the polymer in the white ink.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: June 22, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Juichi Furukawa, Tatsuya Tomura
  • Patent number: 10829655
    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: Grant
    Filed: July 10, 2018
    Date of Patent: November 10, 2020
    Assignee: RICOH COMPANY, LTD.
    Inventors: Masahiro Kido, Juichi Furukawa, Hidefumi Nagashima, Yukihiro Imanaga
  • Publication number: 20200224048
    Abstract: A recording liquid contains a luster pigment having a mean number diameter of less than 200 nm and a modified ethylene vinyl acetate polymer or the combination of a polyamide amine salt and an aliphatic acid amide, wherein the recording liquid has a viscosity of 40 mPa·s or less at 20 degrees C.
    Type: Application
    Filed: January 10, 2020
    Publication date: July 16, 2020
    Inventors: Juichi FURUKAWA, Tatsuya TOMURA
  • Publication number: 20200115579
    Abstract: An ink containing water, an organic solvent, at least two kinds of resin particles, and at least one compound selected from application formulae (1) and (2). Ink-jetting recording method, and record thereof. Described inks have high adhesiveness for various substrates, and have one or more of high rub fastness, solvent resistance, and non-transfer properties, and further have high image hardness and high glossiness.
    Type: Application
    Filed: December 10, 2019
    Publication date: April 16, 2020
    Inventors: Masahiro KIDO, Naohiro TODA, Juichi FURUKAWA, Hidefumi NAGASHIMA, Tomohiro NAKAGAWA, Noriaki OKADA, Hikaru KOBAYASHI
  • Patent number: 10519331
    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: Grant
    Filed: June 3, 2016
    Date of Patent: December 31, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Masahiro Kido, Hidefumi Nagashima, Juichi Furukawa, Yuta Nakamura
  • Publication number: 20190345356
    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: July 23, 2019
    Publication date: November 14, 2019
    Inventors: Masahiro KIDO, Hidefumi NAGASHIMA, Juichi FURUKAWA, Yuta NAKAMURA
  • Patent number: 10435575
    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: Grant
    Filed: June 3, 2016
    Date of Patent: October 8, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Masahiro Kido, Hidefumi Nagashima, Juichi Furukawa, Yuta Nakamura
  • Publication number: 20190276692
    Abstract: An image forming method comprises applying a white ink containing a metal oxide having a number average particle diameter of from 200 to 700 nm and a polymer to a recording medium and applying a glittery ink containing a glittery pigment to an area on the recording medium where the white ink has been applied, wherein the following relation 1 is satisfied: 0.6?Vp/(Vp+Ve) ??Relation 1, where Vp represents a volume of the metal oxide in the white ink and Ve represents a volume of the polymer in the white ink.
    Type: Application
    Filed: March 5, 2019
    Publication date: September 12, 2019
    Inventors: Juichi FURUKAWA, Tatsuya TOMURA
  • 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