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: 9463623
    Abstract: A liquid ejection head includes channel forming members and a surface treatment film. The channel forming members are joined to each other via an adhesive agent to form a channel for liquid. The surface treatment film is formed on a surface of at least one of the channel forming members. The surface treatment film is an oxidized film including Si. The oxidized film further includes a transition metal forming a passive film.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: October 11, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Daisuke Takagi, Hisashi Habashi, Tomoyuki Aratani, Tatsuya Sameshima, Shinichi Kakuda, Keisuke Hayashi, Juichi Furukawa
  • Patent number: 9446606
    Abstract: An aqueous ink for inkjet includes water; a hydrosoluble organic solvent; a pigment; and a particulate resin. The hydrosoluble organic solvent includes 2,3-butanediol and 1,2-propanediol at a weight ratio (2,3-butanediol/1,2-propanediol) of from 98/2 to 60/40.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: September 20, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Ichiroh Fujii, Naohiro Toda, Tomohiro Nakagawa, Hidefumi Nagashima, Juichi Furukawa
  • Publication number: 20160264808
    Abstract: Ink having high adhesiveness for various substrates. The ink contains water, an organic solvent, at least one compound selected from formulae (1) and (2), and at least two kinds of resin particles. Ink-jet method. Record.
    Type: Application
    Filed: March 7, 2016
    Publication date: September 15, 2016
    Inventors: Masahiro KIDO, Naohiro Toda, Juichi Furukawa, Hidefumi Nagashima, Tomohiro Nakagawa, Noriaki Okada, Hikaru Kobayashi
  • Patent number: 9358810
    Abstract: An inkjet recording method includes recording an image on a heated nonpermeable substrate with an aqueous ink by an inkjet method; and drying the aqueous ink, wherein the method satisfies the following requirements (1) to (3): (1) the aqueous ink comprises water, a hydrosoluble organic solvent, a pigment and a particulate resin, wherein the hydrosoluble organic solvent comprises a solvent having a boiling point not higher than 200° C. in an amount not less than 50% by weight; (2) the hydrosoluble organic solvent having a boiling point not higher than 200° C. comprises 3-methoxy-3-methyl-1-butanol; and (3) a difference of heating temperatures between the recording and the drying is from 25 to 80° C.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: June 7, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Ichiroh Fujii, Naohiro Toda, Tomohiro Nakagawa, Hidefumi Nagashima, Juichi Furukawa
  • Patent number: 9340692
    Abstract: An ink contains water, a hydrosoluble organic solvent, a colorant, a resin A; and a resin B, wherein the content of the resin B is from 0.5% by weight to less than 10% by weight to the content of the resin A and the resin B has a minimum film-forming temperature at least 30° C. lower than that of the resin A.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: May 17, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Tomohiro Nakagawa, Naohiro Toda, Hidefumi Nagashima, Juichi Furukawa, Hikaru Kobayashi
  • Patent number: 9321923
    Abstract: Aqueous ink for inkjet that contains water; a hydrosoluble organic solvent; a pigment; and a resin, wherein the hydrosoluble organic solvent comprises 2,3-butane diol having a total ratio of (2R, 3R) form and (2S, 3S) form of greater than 50% by weight in 2,3-butane diol, where (2R, 3R) form represents (2R, 3R)-(?)-2,3-butane diol and (2S, 3S) form represents (2S, 3S)-(+)-2,3-butane diol, wherein 2,3-butane diol accounts for 5% by weight to 40% by weight of the entire of the aqueous ink.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: April 26, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Tomohiro Nakagawa, Naohiro Toda, Hidefumi Nagashima, Juichi Furukawa, Ichiroh Fujii
  • Publication number: 20160102220
    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: Application
    Filed: September 29, 2015
    Publication date: April 14, 2016
    Inventors: Masahiro KIDO, Naohiro TODA, Tomohiro NAKAGAWA, Juichi FURUKAWA, Hidefumi NAGASHIMA, Hikaru KOBAYASHI
  • Patent number: 9284464
    Abstract: An inkjet ink including: water; a water-soluble organic solvent; a pigment; polycarbonate modified urethane resin particles; an ultraviolet absorber; and a light stabilizer.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: March 15, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Hidefumi Nagashima, Naohiro Toda, Tomohiro Nakagawa, Juichi Furukawa, Ichiroh Fujii
  • Publication number: 20160068697
    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: Application
    Filed: August 10, 2015
    Publication date: March 10, 2016
    Inventors: Naohiro TODA, Tomohiro NAKAGAWA, Hidefumi NAGASHIMA, Juichi FURUKAWA, Masahiro KIDO, Hikaru KOBAYASHI
  • Publication number: 20160032122
    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: Application
    Filed: June 15, 2015
    Publication date: February 4, 2016
    Inventors: Naohiro Toda, Juichi Furukawa, Hidefumi Nagashima, Tomohiro Nakagawa, Hikaru Kobayashi
  • Publication number: 20150368492
    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: Application
    Filed: June 5, 2015
    Publication date: December 24, 2015
    Inventors: Ichiroh FUJII, Naohiro TODA, Tomohiro NAKAGAWA, Hidefumi NAGASHIMA, Juichi FURUKAWA, Hikaru KOBAYASAHI
  • Publication number: 20150361282
    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: Application
    Filed: January 27, 2014
    Publication date: December 17, 2015
    Applicant: Ricoh Company, Ltd.
    Inventors: Tomohiro NAKAGAWA, Naohiro TODA, Hidefumi NAGASHIMA, Ichiroh FUJII, Juichi FURUKAWA
  • Patent number: 9163160
    Abstract: Aqueous ink for inkjet contains water; a hydrosoluble organic solvent; a pigment; and a resin, wherein the hydrosoluble organic solvent contains 2,3-butane diol having meso-2,3-butane diol in an amount of 50% by weight or more in 2,3-butane diol and 2,3-butane diol accounts for 5% by weight to 40% by weight of the entire of the aqueous ink.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: October 20, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Naohiro Toda, Tomohiro Nakagawa, Hidefumi Nagashima, Juichi Furukawa, Ichiroh Fujii, Kiyofumi Nagai
  • Publication number: 20150259553
    Abstract: An ink contains water, a hydrosoluble organic solvent, a colorant, a resin A; and a resin B, wherein the content of the resin B is from 0.5% by weight to less than 10% by weight to the content of the resin A and the resin B has a minimum film-forming temperature at least 30° C. lower than that of the resin A.
    Type: Application
    Filed: March 10, 2015
    Publication date: September 17, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Tomohiro NAKAGAWA, Naohiro Toda, Hidefumi Nagashima, Juichi Furukawa, Hikaru Kobayashi
  • Publication number: 20150258783
    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: Application
    Filed: March 12, 2015
    Publication date: September 17, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Naohiro Toda, Hidefumi Nagashima, Tomohiro Nakagawa, Juichi Furukawa, Ichiroh Fujii
  • Publication number: 20150191614
    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 5, 2015
    Publication date: July 9, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Hidefumi Nagashima, Naohiro Toda, Tomohiro Nakagawa, Juichi Furukawa, Ichiroh Fujii
  • Publication number: 20150165787
    Abstract: An inkjet recording method includes recording an image on a heated nonpermeable substrate with an aqueous ink by an inkjet method; and drying the aqueous ink, wherein the method satisfies the following requirements (1) to (3): (1) the aqueous ink comprises water, a hydrosoluble organic solvent, a pigment and a particulate resin, wherein the hydrosoluble organic solvent comprises a solvent having a boiling point not higher than 200° C. in an amount not less than 50% by weight; (2) the hydrosoluble organic solvent having a boiling point not higher than 200° C. comprises 3-methoxy-3-methyl-1-butanol; and (3) a difference of heating temperatures between the recording and the drying is from 25 to 80° C.
    Type: Application
    Filed: December 4, 2014
    Publication date: June 18, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Ichiroh Fujii, Naohiro Toda, Tomohiro Nakagawa, Hidefumi Nagashima, Juichi Furukawa
  • Publication number: 20150138284
    Abstract: An inkjet ink including: water; a water-soluble organic solvent; a pigment; polycarbonate modified urethane resin particles; an ultraviolet absorber; and a light stabilizer.
    Type: Application
    Filed: November 14, 2014
    Publication date: May 21, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Hidefumi Nagashima, Naohiro Toda, Tomohiro Nakagawa, Juichi Furukawa, Ichiroh Fujii
  • Publication number: 20150116433
    Abstract: An aqueous ink for inkjet includes water; a hydrosoluble organic solvent; a pigment; and a particulate resin. The hydrosoluble organic solvent includes 2,3-butanediol and 1,2-propanediol at a weight ratio (2,3-butanediol/1,2-propanediol) of from 98/2 to 60/40.
    Type: Application
    Filed: October 3, 2014
    Publication date: April 30, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Ichiroh Fujii, Naohiro TODA, Tomohiro NAKAGAWA, Hidefumi NAGASHIMA, Juichi FURUKAWA
  • Publication number: 20150077482
    Abstract: Aqueous ink for inkjet contains water; a hydrosoluble organic solvent; a pigment; and a resin, wherein the hydrosoluble organic solvent contains 2,3-butane diol having meso-2,3-butane diol in an amount of 50% by weight or more in 2,3-butane diol and 2,3-butane diol accounts for 5% by weight to 40% by weight of the entire of the aqueous ink.
    Type: Application
    Filed: September 10, 2014
    Publication date: March 19, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Naohiro Toda, Tomohiro Nakagawa, Hidefumi Nagashima, Juichi Furukawa, Ichiroh Fujii, Kiyofumi Nagai