Patents by Inventor Keitaro Nakano

Keitaro Nakano 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).

  • PHOTO-CURABLE INK JET INK SET AND INK JET RECORDING METHOD USING THE SAME
    Publication number: 20170291431
    Abstract: A photo-curable ink jet ink set includes an undercoating photo-curable ink jet ink containing a (meth)acrylic acid ester having a vinyl ether group expressed by general formula (I), and an overcoating photo-curable ink jet ink. The undercoating photo-curable ink jet ink has a higher surface tension than the overcoating photo-curable ink jet ink.
    Type: Application
    Filed: June 21, 2017
    Publication date: October 12, 2017
    Applicant: Seiko Epson Corporation
    Inventors: Keitaro NAKANO, Jun ITO
  • Ink jet recording method, ultraviolet curable ink and ink jet recording apparatus
    Patent number: 9782982
    Abstract: An ink jet recording method includes discharging a ultraviolet curable ink of which viscosity is 7 mPa·s or more at 20° C. from a head toward a recording medium, and curing the ultraviolet curable ink adhered to the recording medium, wherein, in the discharging, the temperature of the ultraviolet curable ink discharged is 20 to 30° C., and the viscosity of the ultraviolet curable ink at the temperature is 13 mPa·s or less.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: October 10, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Atsushi Yoshida, Keitaro Nakano
  • Photocurable ink composition for ink jet recording and ink jet recording method
    Patent number: 9777172
    Abstract: The present invention provides a photocurable ink composition for ink jet recording with excellent curability. The photocurable ink composition for ink jet recording includes polymerizable compounds, a photopolymerization initiator, and a colorant, wherein the polymerizable compounds include a vinyl ether group-containing (meth)acrylate represented by general formula (I): CH2?CR1—COOR2—O—CH?CH—R3??(I) (wherein R1 is a hydrogen atom or a methyl group, R2 is a divalent organic residue having 2 to 20 carbon atoms, and R3 is a hydrogen atom or a monovalent organic residue having 1 to 11 carbon atoms) and phenoxyethyl (meth)acrylate.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: October 3, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Hiroaki Kida, Hiroshi Fukumoto, Toru Saito, Keitaro Nakano, Hiroki Nakane
  • Pigment dispersion, ink composition, inkset, and recording device
    Patent number: 9764559
    Abstract: A pigment dispersion containing a metal pigment, wherein the metal pigment contains plate-like particles, and in the case where the longitudinal diameter on the planar surface of the plate-like particle is X, the lateral diameter is Y, and the thickness is Z, the 50% average particle diameter R50 of a corresponding circle determined from the surface area in the X-Y plane of the plate-like particle is between 0.5 and 3 ?m, and the condition R50/Z>5 is satisfied.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: September 19, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Takashi Oyanagi, Keitaro Nakano
  • RADIATION-CURABLE INK JET COMPOSITION AND INK JET RECORDING METHOD
    Publication number: 20170240754
    Abstract: A radiation-curable ink jet composition contains monomer A represented by formula (1), a mono-, bi-, or trifunctional urethane (meth)acrylate oligomer, and an N-vinyl compound: CH2?CR1—COOR2—O—CH?CH—R3??(1) where R1 denotes —H or —CH3, R2 denotes an organic residue having 2 to 20 carbon atoms, and R3 denotes a hydrogen atom or an organic residue having 1 to 11 carbon atoms.
    Type: Application
    Filed: February 22, 2017
    Publication date: August 24, 2017
    Inventors: Hitoshi TSUCHIYA, Keitaro NAKANO, Toru SAITO, Toshiyuki YODA
  • Ink jet method and ink jet apparatus
    Patent number: 9738094
    Abstract: An ink jet method includes supplying a radiation curable composition to a discharging head via a composition flow channel; and discharging the radiation curable composition from the discharging head, in which the composition flow channel includes a gear pump that causes the radiation-curable composition to flow in the composition flow channel, and an air supply mechanism that supplies air to the radiation curable composition further to the upstream side in the flow direction than the gear pump.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: August 22, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Hitoshi Tsuchiya, Masaaki Ando, Keitaro Nakano, Hiroaki Kida, Toshiyuki Yoda
  • Photocurable ink composition, recording method, recording apparatus, photocurable ink jet recording ink composition, and ink jet recording method
    Patent number: 9738800
    Abstract: A photocurable ink composition includes polymerizable compounds and a photopolymerization initiator. The polymerizable compounds include vinyl ether group-containing (meth)acrylic esters represented by the following Formula (I): CH2?CR1—COOR2—O—CH?CH—R3??(I) (wherein, R1 represents a hydrogen atom or a methyl group; R2 represents a divalent organic residue having 2 to 20 carbon atoms; and R3 represents a hydrogen atom or a monovalent organic residue having 1 to 11 carbon atoms), dipropylene glycol di(meth)acrylate, and monofunctional (meth)acrylate having an aromatic ring skeleton. The ink composition includes a coloring material.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: August 22, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Keitaro Nakano, Hiroshi Fukumoto, Hiroki Nakane, Hiroaki Kida, Toru Saito, Chigusa Sato
  • RADIATION CURABLE INK JET COMPOSITION AND INK JET RECORDING METHOD
    Publication number: 20170233594
    Abstract: There is provided a radiation curable ink jet composition including: a monomer A that has one of a (meth)acryloyloxy group and a (meth)acryloyl group and has a cyclic structure containing one or more nitrogen atoms and one or more oxygen atoms in addition to the (meth)acryloyloxy group and the (meth)acryloyl group; and a monofunctional monomer B other than the monomer A; in which the content of the monomer A is equal to or less than 25% by mass with respect to the total mass of the composition, and in which mol average Tg of the monomer A and the monofunctional monomer B is equal to or greater than 45° C.
    Type: Application
    Filed: February 7, 2017
    Publication date: August 17, 2017
    Inventors: Toshiyuki YODA, Keitaro NAKANO, Hitoshi TSUCHIYA
  • Ultraviolet curable composition and storage body
    Patent number: 9718973
    Abstract: An ultraviolet curable composition includes a polymerizable compound and is stored in a storage body, in which an amount of water is greater than or equal to 0.05 mass % and less than or equal to 1.0 mass % with respect to a total amount of the ultraviolet curable composition, a content of at least one metal element selected from a group consisting of Li, Na, K, Ag, Mg, Ca, Ba, Zn, Fe, Sn, Al, and Zr is greater than or equal to 10 ppm by mass, and a content of each metal element included in the group is less than or equal to 250 ppm by mass.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: August 1, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Hiroaki Kida, Tetsuya Aoyama, Keitaro Nakano, Hitoshi Tsuchiya, Toshiyuki Yoda
  • Photo-curable ink jet ink set and ink jet recording method using the same
    Patent number: 9713926
    Abstract: A photo-curable ink jet ink set includes an undercoating photo-curable ink jet ink containing a (meth)acrylic acid ester having a vinyl ether group expressed by general formula (I), and an overcoating photo-curable ink jet ink. The undercoating photo-curable ink jet ink has a higher surface tension than the overcoating photo-curable ink jet ink.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: July 25, 2017
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Keitaro Nakano, Jun Ito
  • INK SET, INK-JET RECORDING METHOD, AND RECORDED MATERIAL
    Publication number: 20170158895
    Abstract: An ink set includes a metallic ink composition containing a metal pigment and at least one curable ink composition selected from the group consisting of a chromatic ink composition, a black ink composition, and a white ink composition.
    Type: Application
    Filed: February 24, 2017
    Publication date: June 8, 2017
    Applicant: Seiko Epson Corporation
    Inventors: Takashi Oyanagi, Keitaro Nakano
  • ULTRAVIOLET-CURABLE COMPOSITION AND RECORDED MATTER
    Publication number: 20170137642
    Abstract: An ultraviolet-curable composition includes a polymerizable compound; a metal powder; and a dendritic polymer which contains a fluorine atom. The average particle diameter of the dendritic polymer is preferably 2 nm to 20 nm. In addition, the dendritic polymer preferably has an acrylic skeleton. The average particle diameter of the metal powder is preferably 200 nm to 3.0 ?m.
    Type: Application
    Filed: November 3, 2016
    Publication date: May 18, 2017
    Inventors: Hiroshi TAKIGUCHI, Keitaro NAKANO, Yoshiyuki SUZUKI
  • ULTRAVIOLET-CURABLE COMPOSITION AND RECORDED MATTER
    Publication number: 20170137653
    Abstract: An ultraviolet-curable composition is discharged with an ink jet method and includes a polymerizable compound; a metal powder; and a thixotropy suppressing agent, in which a relationship of ?2??1?3 is satisfied between a viscosity ?1 [mPa s] at a shearing speed of 1000 sec?1 and a viscosity ?2 [mPa s] which is determined by measuring in a state where the shearing speed is 10 sec?1 after continuing to add shearing stress for 10 minutes at the shearing speed of 1000 sec?1.
    Type: Application
    Filed: November 3, 2016
    Publication date: May 18, 2017
    Inventors: Hiroshi TAKIGUCHI, Keitaro NAKANO, Yoshiyuki SUZUKI
  • Ink set, ink-jet recording method, and recorded material
    Patent number: 9616675
    Abstract: An ink set includes a metallic ink composition containing a metal pigment and at least one curable ink composition selected from the group consisting of a chromatic ink composition, a black ink composition, and a white ink composition.
    Type: Grant
    Filed: October 14, 2014
    Date of Patent: April 11, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Takashi Oyanagi, Keitaro Nakano
  • PIGMENT DISPERSION, INK COMPOSITION, INKSET, AND RECORDING DEVICE
    Publication number: 20170088728
    Abstract: A pigment dispersion containing a metal pigment, wherein the metal pigment contains plate-like particles, and in the case where the longitudinal diameter on the planar surface of the plate-like particle is X, the lateral diameter is Y, and the thickness is Z, the 50% average particle diameter R50 of a corresponding circle determined from the surface area in the X-Y plane of the plate-like particle is between 0.5 and 3 ?m, and the condition R50/Z>5 is satisfied.
    Type: Application
    Filed: December 12, 2016
    Publication date: March 30, 2017
    Inventors: Takashi OYANAGI, Keitaro NAKANO
  • INK JET RECORDING METHOD, ULTRAVIOLET CURABLE INK, AND INK JET RECORDING APPARATUS
    Publication number: 20170087876
    Abstract: Provided is an ink jet recording method including: discharging first ultraviolet curable ink of a radical polymerization reaction type which contains a radical photopolymerization initiator and a radical polymerization compound and in which transmittance at a wavelength of 395 nm is equal to or less than 1%, onto a recording medium; and curing the first ultraviolet curable ink which is landed on the recording medium by irradiating the ink with ultraviolet light, in which a light source which initially emits the ultraviolet light in the curing of the ink is an ultraviolet light emitting diode in which peak intensity of the irradiated ultraviolet light is equal to or more than 800 mW/cm2.
    Type: Application
    Filed: December 8, 2016
    Publication date: March 30, 2017
    Applicant: Seiko Epson Corporation
    Inventors: Mikito Nakajima, Keitaro Nakano, Mitsuaki Yoshizawa
  • Ultraviolet-curable ink jet composition and storage body thereof
    Patent number: 9587122
    Abstract: There is provided an ultraviolet-curable ink jet composition, which is stored in an storage body, including a pigment; a pigment dispersant; a polymerizable compound; and a photopolymerization initiator, in which water content is 0.05 mass % to 1.0 mass % based on the total amount of the ultraviolet-curable ink jet composition, and in which both the acid value and the amine value of the pigment dispersant are 50 mgKOH/g or less, and at least one of the acid value and the amine value thereof is 10 mgKOH/g or more.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: March 7, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Hiroaki Kida, Tetsuya Aoyama, Keitaro Nakano, Hitoshi Tsuchiya, Toshiyuki Yoda
  • Pigment dispersion, ink composition, inkset, and recording device
    Patent number: 9550900
    Abstract: A pigment dispersion containing metal pigment, wherein the metal pigment contains plate-like particles, and in the case where the longitudinal diameter on the planar surface of the plate-like particle is X, the lateral diameter is Y, and the thickness is Z, the 50% average particle diameter R50 of a corresponding circle determined from the surface area in the X-Y plane of the plate-like particle is between 0.5 and 3 ?m, and the condition R50/Z>5 is satisfied.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: January 24, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Takashi Oyanagi, Keitaro Nakano
  • UV CURABLE INK JET RECORDING INK COMPOSITION, INK CONTAINER AND INK JET RECORDING APPARATUS
    Publication number: 20170002221
    Abstract: The UV curable ink jet recording ink composition contains a thioxanthone-based photopolymerization initiator and a hindered amine compound. The dissolved oxygen content in the ink composition is 20 ppm or less.
    Type: Application
    Filed: September 19, 2016
    Publication date: January 5, 2017
    Applicant: Seiko Epson Corporation
    Inventors: Hiroaki Kida, Hiroshi Fukumoto, Keitaro Nakano, Toyohiko Mitsuzawa
  • Ink jet recording method and ink jet recording apparatus
    Patent number: 9505221
    Abstract: An ink jet recording method includes delivering a non-aqueous light-curable ink composition stored in an ink container from the ink container to a head via an ink delivery path and discharging the ink composition from the head toward a recording medium. The non-aqueous light-curable ink composition contains a radically-polymerizable compound and has a surface tension of 25 mN/m or less. The non-aqueous light-curable ink composition stored in the ink container has a dissolved air content of 7 ppm or more. The non-aqueous light-curable ink composition has a dissolved air content of 30 ppm or less at delivery from the ink delivery path to the head.
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: November 29, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Keitaro Nakano, Mitsuaki Yoshizawa