Patents by Inventor Mitsuaki KOSAKA

Mitsuaki KOSAKA 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: 10737510
    Abstract: A recording method is provided including: discharging and adhering a reaction liquid to an ink non-absorbable or ink low-absorbable recording medium in a form of a droplet, by using an ink jet method, the reaction liquid containing a reagent for aggregating or thickening of a colored ink composition; and adhering a colored ink composition to the recording medium to which the reaction liquid has adhered. The recording medium is heated before adhering the colored ink composition to the recording medium, a period from when adhering of the reaction liquid is ended until adhering of the colored ink composition is started is within 30 seconds, and a surface temperature of the recording medium from the adhering of the reaction liquid to the adhering of the colored ink composition is equal to or lower than 38° C.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: August 11, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Ippei Okuda, Mitsuaki Kosaka
  • Patent number: 10669441
    Abstract: An aqueous ink jet ink composition includes resin fine particles, a non-ionic surfactant, a resin dissolving solvent, and water, in which, in the aqueous ink jet ink composition, a total acid value of an acid value of the resin fine particles and an acid value of the dispersant resin when the aqueous ink jet ink composition includes a dispersant resin is 200 (mg KOH/100 g ink) or less.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: June 2, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Akiko Matsuzaki, Mitsuaki Kosaka
  • Patent number: 10618309
    Abstract: An ink jet recording method according to the invention includes attaching a reaction liquid including a reactant for aggregating or thickening a coloring ink component including a coloring material to a recording medium; attaching the coloring ink by an ink jet method to an area where the reaction liquid is attached, in a state where a residual rate of a volatile component of the reaction liquid attached on the recording medium is 25% by mass or more after attaching of the reaction liquid; and attaching a clear ink including a resin to the area where the coloring ink is attached.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: April 14, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Takeshi Yano, Ippei Okuda, Mitsuaki Kosaka
  • Patent number: 10576770
    Abstract: Provided is an ink jet recording method including heating a recording medium, attaching an aqueous ink composition to the recording medium heated in the heating by ejecting the aqueous ink composition through a nozzle, the aqueous ink composition containing water, a solvent, and resin particles, and blowing wind to a surface of the recording medium in the attaching. The resin particles include particular resin particles that are dispersed in water after leaving a mixture liquid of the particular resin particles to stand for 2 hours at 40° C. and are not dispersed in water after leaving the mixture liquid to stand for 1 hour at 80° C., the mixture liquid containing a composition of the solvent contained in the aqueous ink composition and the particular resin particles as a solid resin component in a mass ratio of 1:1.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: March 3, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Kenichi Seguchi, Mitsuaki Kosaka
  • Patent number: 10556450
    Abstract: An ink jet recording method includes heating a recording medium, and attaching an aqueous ink composition to the heated recording medium by ejecting the aqueous ink composition through a nozzle. The aqueous ink composition contains water, a solvent, and resin particles. In the attaching step, a temperature difference between a temperature of the nozzle and a surface temperature of the heated recording medium is ?4 to 8° C. The resin particles include particular resin particles formed from a resin whose decrease rate of absorbance of light having a wavelength of 400 nm is 15% or smaller in 1 hour at 40° C. and 10% or larger in 1 hour at 80° C. in a liquid mixture containing the solvent contained in the aqueous ink composition and the particular resin particles such that a resin solid component of the liquid mixture is 0.5% by mass.
    Type: Grant
    Filed: October 30, 2018
    Date of Patent: February 11, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Kenichi Seguchi, Mitsuaki Kosaka
  • Publication number: 20190329579
    Abstract: According to the invention, there is provided a recording method which includes adhering an ink composition to a recording medium, and adhering a reaction liquid to the recording medium, the reaction liquid containing water and a reagent for aggregating or thickening components of the ink composition, and having a pH of 7 to 10. In the adhering of the reaction liquid, an epoxy-based adhesive is used for at least a portion of a reaction liquid passage for supplying the reaction liquid to an ink jet head, and a member in contact with the reaction liquid in the ink jet head, and the reaction liquid is discharged from the ink jet head so as to adhere to the recording medium.
    Type: Application
    Filed: July 9, 2019
    Publication date: October 31, 2019
    Inventors: Ippei OKUDA, Mitsuaki KOSAKA
  • Patent number: 10457073
    Abstract: An ink jet recording method according to one aspect of the invention includes a reaction liquid adhesion step of ejecting from an ink jet head, a reaction liquid in the form of liquid droplets containing an aggregating agent which aggregates a color ink composition so as to adhere the reaction liquid to a recording region of a recording medium which is a non-absorptive recording medium or a low-absorptive recording medium; and a color ink adhesion step of ejecting the color ink composition in the form of liquid droplets from the ink jet head so as to adhere the color ink composition to the recording region of the recording medium to which the reaction liquid is adhered. In the reaction liquid adhesion step, while ejecting the liquid droplets, the ink jet head is scanned a plurality of times so as to be moved relatively with respect to the recording medium.
    Type: Grant
    Filed: December 26, 2017
    Date of Patent: October 29, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Ippei Okuda, Mitsuaki Kosaka
  • Patent number: 10434808
    Abstract: An ink jet recording method includes attaching a reaction solution which contains an aggregating agent for aggregating a component of a water-based ink composition to a recording region of a recording medium, and attaching a water-based ink composition which contains a pigment dispersion containing a surface-treated pigment and water to the recording region of the recording medium by discharging the water-based ink composition from an ink jet head, in which the recording region includes a region in which an attachment amount of the water-based ink composition is in a range of 2 times to 20 times the attachment amount of the reaction solution.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: October 8, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Akiko Matsuzaki, Mitsuaki Kosaka
  • Publication number: 20190292391
    Abstract: An ink set includes a first ink and a second ink which are water-based ink compositions, in which each of the first ink and the second ink includes a pigment and resin including resin particles, the first ink includes a first pigment and the second ink includes a second pigment different from the first pigment, the first ink and the second ink are mixed with a 5% by mass water-based solution of magnesium sulfate heptahydrate to increase a volume average particle diameter of the ink and a difference in the volume average particle diameter for the inks in the inks after mixing is 40% or less, and the ink set is used for recording together with a treatment liquid including an aggregating agent for aggregating the components of the water-based ink compositions.
    Type: Application
    Filed: March 22, 2019
    Publication date: September 26, 2019
    Inventors: Kenichi SEGUCHI, Mitsuaki KOSAKA
  • Publication number: 20190291471
    Abstract: An ink jet recording method includes attaching ink by ejecting an ink composition from a head to attach to a recording region of a recording medium, and drying by heating the recording medium to which the ink composition is attached, in which the ink composition is a water-based ink composition including a resin and an amide compound represented by General Formula (1) as an organic solvent, and the drying dries the organic solvent in the recording region of the recording medium to be 2.0 mg/inch2 or less. In Formula (1), R1 represents a linear or branched alkyl group having 1 to 6 carbon atoms; R2 and R3s represent each independently H or a linear or branched alkyl group having 1 to 4 carbon atoms.
    Type: Application
    Filed: March 22, 2019
    Publication date: September 26, 2019
    Inventors: Hitoshi OHTA, Mitsuaki KOSAKA
  • Patent number: 10391802
    Abstract: According to the invention, there is provided a recording method which includes adhering an ink composition to a recording medium, and adhering a reaction liquid to the recording medium, the reaction liquid containing water and a reagent for aggregating or thickening components of the ink composition, and having a pH of 7 to 10. In the adhering of the reaction liquid, an epoxy-based adhesive is used for at least a portion of a reaction liquid passage for supplying the reaction liquid to an ink jet head, and a member in contact with the reaction liquid in the ink jet head, and the reaction liquid is discharged from the ink jet head so as to adhere to the recording medium.
    Type: Grant
    Filed: April 12, 2016
    Date of Patent: August 27, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Ippei Okuda, Mitsuaki Kosaka
  • Publication number: 20190210380
    Abstract: A recording method is provided including: discharging and adhering a reaction liquid to an ink non-absorbable or ink low-absorbable recording medium in a form of a droplet, by using an ink jet method, the reaction liquid containing a reagent for aggregating or thickening of a colored ink composition; and adhering a colored ink composition to the recording medium to which the reaction liquid has adhered. The recording medium is heated before adhering the colored ink composition to the recording medium, a period from when adhering of the reaction liquid is ended until adhering of the colored ink composition is started is within 30 seconds, and a surface temperature of the recording medium from the adhering of the reaction liquid to the adhering of the colored ink composition is equal to or lower than 38° C.
    Type: Application
    Filed: March 19, 2019
    Publication date: July 11, 2019
    Inventors: Ippei OKUDA, Mitsuaki KOSAKA
  • Patent number: 10329442
    Abstract: There are provided an aqueous ink composition containing a polyolefin wax; a resin dispersion; water; and a surfactant A, in which a content of one kind or more of the surfactants A, which are surfactants having a molecular weight of less than 10,000 and which are selected from the group consisting of an ionic surfactant and a nonionic surfactant, the nonionic surfactant being selected from the group consisting of ethers of polyalkylene oxide, higher aliphatic acid esters, and higher aliphatic amides, is 7 parts by mass or less when a total content of the resin of the resin dispersion and the polyolefin wax is 100 parts by mass, and the aqueous ink composition is used in a recording method including attaching a reaction liquid, which contains an aggregating agent for aggregating components of an aqueous ink composition, to a recording medium.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: June 25, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Akiko Matsuzaki, Mitsuaki Kosaka
  • Publication number: 20190135008
    Abstract: Provided is an ink jet recording method including heating a recording medium, attaching an aqueous ink composition to the recording medium heated in the heating by ejecting the aqueous ink composition through a nozzle, the aqueous ink composition containing water, a solvent, and resin particles, and blowing wind to a surface of the recording medium in the attaching. The resin particles include particular resin particles that are dispersed in water after leaving a mixture liquid of the particular resin particles to stand for 2 hours at 40° C. and are not dispersed in water after leaving the mixture liquid to stand for 1 hour at 80° C., the mixture liquid containing a composition of the solvent contained in the aqueous ink composition and the particular resin particles as a solid resin component in a mass ratio of 1:1.
    Type: Application
    Filed: November 7, 2018
    Publication date: May 9, 2019
    Inventors: Kenichi SEGUCHI, Mitsuaki KOSAKA
  • Patent number: 10279602
    Abstract: According to the invention, there is provided a recording method which includes discharging and adhering a reaction liquid to an ink non-absorbable or ink low-absorbable recording medium in a form of a droplet, by using an ink jet method, the reaction liquid containing a reagent for aggregating or thickening of a colored ink composition, so as to have a content of 0.1 mol/kg to 0.9 mol/kg, and the reaction liquid having an adhering amount which is set to be equal to or smaller than 1.9 mg/inch2, and adhering a colored ink composition to the recording medium to which the reaction liquid has adhered. A period from when adhering of the reaction liquid is ended until adhering of the colored ink composition is started is within 30 seconds. A surface temperature of the recording medium from the adhering of the reaction liquid to the adhering of the colored ink composition is equal to or lower than 38° C.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: May 7, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Ippei Okuda, Mitsuaki Kosaka
  • Publication number: 20190126639
    Abstract: An ink jet recording method includes heating a recording medium, and attaching an aqueous ink composition to the heated recording medium by ejecting the aqueous ink composition through a nozzle. The aqueous ink composition contains water, a solvent, and resin particles. In the attaching step, a temperature difference between a temperature of the nozzle and a surface temperature of the heated recording medium is ?4 to 8° C. The resin particles include particular resin particles formed from a resin whose decrease rate of absorbance of light having a wavelength of 400 nm is 15% or smaller in 1 hour at 40° C. and 10% or larger in 1 hour at 80° C. in a liquid mixture containing the solvent contained in the aqueous ink composition and the particular resin particles such that a resin solid component of the liquid mixture is 0.5% by mass.
    Type: Application
    Filed: October 30, 2018
    Publication date: May 2, 2019
    Inventors: Kenichi SEGUCHI, Mitsuaki KOSAKA
  • Patent number: 10259248
    Abstract: An ink jet recording method includes: a reaction liquid application step of ejecting from an ink jet head, a reaction liquid containing an aggregating agent which aggregates an ink composition so as to adhere the reaction liquid to a recording medium which is a non-absorptive recording medium or a low-absorptive recording medium; a reaction liquid drying step of drying the reaction liquid adhered to the recording medium; and an ink composition application step of ejecting the ink composition from the ink jet head so as to apply the ink composition to the recording medium to which the reaction liquid is adhered. When the ink composition is to be adhered, the reaction liquid is dried so that an evaporated amount of water and an organic solvent contained in the reaction liquid are 70 percent by mass or more and 60 percent by mass or less, respectively.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: April 16, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Ippei Okuda, Tsuyoshi Sano, Mitsuaki Kosaka
  • Publication number: 20180281492
    Abstract: An ink jet recording method includes attaching a reaction solution which contains an aggregating agent for aggregating a component of a water-based ink composition to a recording region of a recording medium, and attaching a water-based ink composition which contains a pigment dispersion containing a surface-treated pigment and water to the recording region of the recording medium by discharging the water-based ink composition from an ink jet head, in which the recording region includes a region in which an attachment amount of the water-based ink composition is in a range of 2 times to 20 times the attachment amount of the reaction solution.
    Type: Application
    Filed: February 13, 2018
    Publication date: October 4, 2018
    Inventors: Akiko MATSUZAKI, Mitsuaki KOSAKA
  • Publication number: 20180282564
    Abstract: An aqueous ink jet ink composition includes resin fine particles, a non-ionic surfactant, a resin dissolving solvent, and water, in which, in the aqueous ink jet ink composition, a total acid value of an acid value of the resin fine particles and an acid value of the dispersant resin when the aqueous ink jet ink composition includes a dispersant resin is 200 (mg KOH/100 g ink) or less.
    Type: Application
    Filed: February 26, 2018
    Publication date: October 4, 2018
    Inventors: Akiko MATSUZAKI, Mitsuaki KOSAKA
  • Publication number: 20180273789
    Abstract: There are provided an aqueous ink composition containing a polyolefin wax; a resin dispersion; water; and a surfactant A, in which a content of one kind or more of the surfactants A, which are surfactants having a molecular weight of less than 10,000 and which are selected from the group consisting of an ionic surfactant and a nonionic surfactant, the nonionic surfactant being selected from the group consisting of ethers of polyalkylene oxide, higher aliphatic acid esters, and higher aliphatic amides, is 7 parts by mass or less when a total content of the resin of the resin dispersion and the polyolefin wax is 100 parts by mass, and the aqueous ink composition is used in a recording method including attaching a reaction liquid, which contains an aggregating agent for aggregating components of an aqueous ink composition, to a recording medium.
    Type: Application
    Filed: February 28, 2018
    Publication date: September 27, 2018
    Inventors: Akiko MATSUZAKI, Mitsuaki KOSAKA