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: 11845875
    Abstract: A glittery ink contains glittery pigment particles, resin particles, and an organic solvent, wherein the following relationships are satisfied: a?c?b and a<b, where a represents the particle diameter of the resin particles corresponding to the minimum of two or more peaks in a particle size distribution as measured by a dynamic light scattering particle size distribution measuring device, b represents the particle diameter of the resin particles corresponding to the maximum of the two or more peaks in the particle size distribution, and c represents the particle diameter of the glittery pigment corresponding to a maximum number of particles in a particle size distribution as measured by the dynamic light scattering particle size distribution measuring device.
    Type: Grant
    Filed: November 22, 2021
    Date of Patent: December 19, 2023
    Assignee: Ricoh Company, Ltd.
    Inventor: Juichi Furukawa
  • Publication number: 20230303869
    Abstract: An ink discharging device contains an ink containing an organic solvent with an SP value of from 9.0 to 12.0, a white pigment, a polyurethane resin with a glass transition temperature Tg of 0 degrees C. or lower, and water, and an ink discharging unit including a nozzle plate including a liquid repellent layer containing a silicone resin, the ink discharging unit for discharging the ink, wherein the proportion of the organic solvent to the entire of the ink is from 0.5 to 2.5 percent by mass and the proportion of the white pigment to the entire of the ink is from 6 to 15 percent by mass.
    Type: Application
    Filed: March 16, 2023
    Publication date: September 28, 2023
    Applicant: Ricoh Cpmpany, Ltd.
    Inventors: Daisuke Ozaki, Toshiyuki Kobashi, Hiroshi Gotou, Ayaka Tanaka, Juichi Furukawa
  • Publication number: 20230132661
    Abstract: A set of inkjet inks used for forming an image by application of an ink on a cloth is provided. The set includes an ink and a pre-processing fluid. The pre-processing fluid contains water, a compound that flocculates an anionic compound, and at least one emulsified sizing agent.
    Type: Application
    Filed: October 27, 2022
    Publication date: May 4, 2023
    Applicant: Ricoh Company, Ltd.
    Inventors: Hiroshi Gotou, Toshiyuki Kobashi, Daisuke Ozaki, Juichi Furukawa
  • Patent number: 11472977
    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: July 23, 2019
    Date of Patent: October 18, 2022
    Assignee: Ricoh Company, Ltd.
    Inventors: Masahiro Kido, Hidefumi Nagashima, Juichi Furukawa, Yuta Nakamura
  • Publication number: 20220298373
    Abstract: An ink set contains white ink and color ink, wherein the difference in static surface tension between the white ink and the color ink is 1.0 mN/m or less and each difference in dynamic surface tension between the white ink and the color ink at each bubble life time of 15 msec, 150 msec, and 1,500 msec at 25 degrees C. is 1.0 mN/m or less as measured by maximum bubble pressure technique.
    Type: Application
    Filed: March 17, 2022
    Publication date: September 22, 2022
    Applicant: Ricoh Company, Ltd.
    Inventors: Hiroshi Gotou, Toshiyuki Kobashi, Juichi Furukawa, Daisuke Ozaki
  • Publication number: 20220289993
    Abstract: A processing fluid contains an alcohol having an amino group and a polyvalent metal salt, wherein the processing fluid is applied to fabric.
    Type: Application
    Filed: March 1, 2022
    Publication date: September 15, 2022
    Applicant: Ricoh Company, Ltd.
    Inventors: Daisuke Ozaki, Hiroshi Gotou, Toshiyuki Kobashi, Juichi Furukawa
  • Publication number: 20220282107
    Abstract: A processing fluid contains a resin having an amino group and an amine value of from 200 to 1,200 mgKOH/g and a polyvalent metal salt, wherein the proportion of the resin to the processing fluid is from 0.01 to 10 percent by mass and the processing fluid is applied to the fabric.
    Type: Application
    Filed: February 28, 2022
    Publication date: September 8, 2022
    Applicant: Ricoh Company, Ltd.
    Inventors: Daisuke OZAKI, Toshiyuki Kobashi, Hiroshi Gotou, Juichi Furukawa
  • Patent number: 11407226
    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: Grant
    Filed: January 27, 2021
    Date of Patent: August 9, 2022
    Assignee: RICOH COMPANY, LTD.
    Inventors: Juichi Furukawa, Tatsuya Tomura
  • Patent number: 11390765
    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: Grant
    Filed: January 10, 2020
    Date of Patent: July 19, 2022
    Assignee: RICOH COMPANY, LTD.
    Inventors: Juichi Furukawa, Tatsuya Tomura
  • Publication number: 20220169879
    Abstract: A glittery ink contains glittery pigment particles, resin particles, and an organic solvent, wherein the following relationships are satisfied: a?c?b and a<b, where a represents the particle diameter of the resin particles corresponding to the minimum of two or more peaks in a particle size distribution as measured by a dynamic light scattering particle size distribution measuring device, b represents the particle diameter of the resin particles corresponding to the maximum of the two or more peaks in the particle size distribution, and c represents the particle diameter of the glittery pigment corresponding to a maximum number of particles in a particle size distribution as measured by the dynamic light scattering particle size distribution measuring device.
    Type: Application
    Filed: November 22, 2021
    Publication date: June 2, 2022
    Applicant: Ricoh Company, Ltd.
    Inventor: Juichi FURUKAWA
  • 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