Patents by Inventor Naotaka Wachi

Naotaka Wachi 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).

  • Publication number: 20210130630
    Abstract: An ink composition is an ink composition including titanium dioxide particles, metal oxide particles, a dispersant, and water, in which an average particle diameter of the titanium dioxide particles is 100 nm or greater, an average particle diameter of the metal oxide particles is smaller than the average particle diameter of the titanium dioxide particles, and the metal oxide particles are oxide particles of at least one metal selected from the group consisting of zirconium, aluminum, silicon, zinc, and iron.
    Type: Application
    Filed: January 14, 2021
    Publication date: May 6, 2021
    Applicant: FUJIFILM Corporation
    Inventors: Naoko NISHIMURA, Naotaka WACHI
  • Patent number: 9249327
    Abstract: An image forming method includes an ink applying step of applying an ink composition containing a pigment, a compound represented by the following structural formula (1), a compound represented by the following structural formula (2) and water, onto a recording medium being conveyed at a conveyance speed of 80 m/min or higher: wherein l, m and n each represent an integer of 1 or more (l+m+n=3 to 15); AO represents ethyleneoxy or propyleneoxy; R represents a hydrocarbon group having 6 to 30 carbon atoms; PO represents propyleneoxy; EO represents ethyleneoxy; and p and q represent integers that satisfy the relations: 0?p?10 and 1?q?50.
    Type: Grant
    Filed: March 22, 2013
    Date of Patent: February 2, 2016
    Assignee: FUJIFILM Corporation
    Inventors: Ryuji Shinohara, Naotaka Wachi
  • Patent number: 9033485
    Abstract: The invention provides an image forming method including at least applying an ink composition to a recording medium to form an image, the recording medium having an absorption amount of the ink composition, within 20 msec1/2 from a start of contact of the ink composition with the recording medium, of 20 ml/m2 or larger according to the Bristow method and being conveyed in a feed direction at a conveying speed of 80 m/min or higher, and the ink composition containing at least a pigment, a compound represented by the following Formula (1), wax and water. In Formula (1), each of l, m, and n independently represents an integer of 1 or more; the sum of l, m, and n is from 3 to 15; and each AO of (AO)l, (AO)m, and (AO)n independently represents an ethyleneoxy group or a propyleneoxy group.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: May 19, 2015
    Assignee: FUJIFILM Corporation
    Inventors: Ryuji Shinohara, Naotaka Wachi
  • Patent number: 8613510
    Abstract: An ink composition for ink jet recording with excellent ink storage stability, which makes it possible to solve the problems concerning blurring or strike through and perform printing with high density and high image quality, is provided. An ink jet recording method which makes it possible to carry out printing with high density and image quality while causing little strike through, using the ink composition, is also provided. The ink composition for ink jet recording, contains at least water, a coloring material, a block polymer that has an ethylene oxide moiety and a propylene oxide moiety, and is gelled at 50° C. or higher and 150° C. or lower, and a polymer latex.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: December 24, 2013
    Assignee: Fujifilm Corporation
    Inventor: Naotaka Wachi
  • Publication number: 20130260036
    Abstract: An image forming method includes an ink applying step of applying an ink composition containing a pigment, a compound represented by the following structural formula (1), a compound represented by the following structural formula (2) and water, onto a recording medium being conveyed at a conveyance speed of 80 m/min or higher: wherein l, m and n each represent an integer of 1 or more (l+m+n=3 to 15); AO represents ethyleneoxy or propyleneoxy; R represents a hydrocarbon group having 6 to 30 carbon atoms; PO represents propyleneoxy; EO represents ethyleneoxy; and p and q represent integers that satisfy the relations: 0?p?10 and 1?q?50.
    Type: Application
    Filed: March 22, 2013
    Publication date: October 3, 2013
    Applicant: FUJIFILM CORPORATION
    Inventors: Ryuji SHINOHARA, Naotaka WACHI
  • Publication number: 20130250016
    Abstract: The invention provides an image forming method including at least applying an ink composition to a recording medium to form an image, the recording medium having an absorption amount of the ink composition, within 20 msec1/2 from a start of contact of the ink composition with the recording medium, of 20 ml/m2 or larger according to the Bristow method and being conveyed in a feed direction at a conveying speed of 80 m/min or higher, and the ink composition containing at least a pigment, a compound represented by the following Formula (1), wax and water. In Formula (1), each of l, m, and n independently represents an integer of 1 or more; the sum of l, m, and n is from 3 to 15; and each AO of (AO)l, (AO)m, and (AO)n independently represents an ethyleneoxy group or a propyleneoxy group.
    Type: Application
    Filed: February 1, 2013
    Publication date: September 26, 2013
    Applicant: FUJIFILM CORPORATION
    Inventors: Ryuji SHINOHARA, Naotaka WACHI
  • Patent number: 8357235
    Abstract: An inkjet ink composition includes a sulfoxide compound, a water-soluble dye having an aromatic heterocycle in a molecule, water and a water-soluble organic solvent, wherein the sulfoxide compound has a content of from 1% by weight to less than 10% by weight, based on the total weight of the composition. An inkjet recording method includes using an inkjet printer having a silicon oxide layer or a silane coupling layer in at least part of a component with which ink is brought into contact, and ejecting an inkjet ink composition from the inkjet printer to record an image on an inkjet recording medium, wherein the inkjet ink composition contains a sulfoxide compound, a water-soluble dye, and the sulfoxide compound has a content of from 1% by weight to less than 10% by weight, based on the total weight of the composition.
    Type: Grant
    Filed: March 25, 2010
    Date of Patent: January 22, 2013
    Assignee: FUJIFILM Corporation
    Inventor: Naotaka Wachi
  • Publication number: 20120321792
    Abstract: An image forming method in which images having better rub fastness than the related art, for which ink permeation toward the rear surface is suppressed, are formed in a case in which images are formed at a high speed using plain paper or special paper is provided. The invention has an ink supplying process in which an ink composition including a pigment, a pyrrolidone derivative, a compound represented by the following structural formula (I), and water is supplied to a recording medium that is transported at a transportation speed of 80 m/min or more so as to form images [in the structural formula (I), l, m, n represent an integer of 1 or more (l+m+n=3 to 15), AO: ethylene oxy, PO: propylene oxy].
    Type: Application
    Filed: June 7, 2012
    Publication date: December 20, 2012
    Applicant: FUJIFILM Corporation
    Inventors: Ryuji SHINOHARA, Naotaka WACHI
  • Publication number: 20120075381
    Abstract: An ink composition for ink jet recording with excellent ink storage stability, which makes it possible to solve the problems concerning blurring or strike through and perform printing with high density and high image quality, is provided. An ink jet recording method which makes it possible to carry out printing with high density and image quality while causing little strike through, using the ink composition, is also provided. The ink composition for ink jet recording, contains at least water, a coloring material, a block polymer that has an ethylene oxide moiety and a propylene oxide moiety, and is gelled at 50° C. or higher and 150° C. or lower, and a polymer latex.
    Type: Application
    Filed: September 27, 2011
    Publication date: March 29, 2012
    Applicant: FUJIFILM CORPORATION
    Inventor: Naotaka WACHI
  • Patent number: 8080099
    Abstract: This invention provides an ink composition comprising at least a dye represented by the following Formula (1), monohydric alcohol having 1 to 5 carbon atoms, and urea: wherein G represents a heterocyclic group; n represents an integer from 1 to 3; when n is 1, R, X, Y, Z, Q, and G each represent a monovalent group; when n is 2, R, X, Y, Z, Q, and G each represent a monovalent or divalent substituent, in which at least one of R, X, Y, Z, Q, or G represents a divalent substituent; and when n is 3, R, X, Y, Z, Q, and G each represent a monovalent, divalent, or trivalent substituent, in which at least two of R, X, Y, Z, Q, or G represent a divalent substituent or represent a trivalent substituent.
    Type: Grant
    Filed: March 17, 2009
    Date of Patent: December 20, 2011
    Assignee: FUJIFILM Corporation
    Inventors: Yuko Saito, Naotaka Wachi
  • Patent number: 8070869
    Abstract: Disclosed is an inkjet recording yellow ink comprising at least one water-soluble azo dye selected from the group consisting of a compound represented by formula (Y) described below and a salt thereof and at least one glycol ether represented by formula (A) described below, wherein the glycol ether is contained in an amount of 25% by mass to 100% by mass relative to a total amount of water-soluble organic solvent in the ink.
    Type: Grant
    Filed: June 26, 2009
    Date of Patent: December 6, 2011
    Assignee: FUJIFILM Corporation
    Inventors: Naotaka Wachi, Wataru Ono
  • Patent number: 8070870
    Abstract: Disclosed is an inkjet recording yellow ink containing a water-soluble azo dye (yn1) selected from the group consisting of a compound represented by the following Formula (Y) in which n is 1, and a salt thereof, and a water-soluble azo dye (yn2) selected from the group consisting of a compound represented by the following Formula (Y) in which n is 2, and a salt thereof: wherein, in Formula (Y), G represents a heterocyclic group; R, X, Y, Z, and Q each independently represent a monovalent or divalent group; n represents 1 or 2; when n is 1, R, X, Y, Z, Q and G each independently represent a monovalent group; and when n is 2, R, X, Y, Z, Q and G each independently represent a monovalent or divalent group, and at least one of R, X, Y, Z, Q and G represents a divalent substituent.
    Type: Grant
    Filed: August 28, 2009
    Date of Patent: December 6, 2011
    Assignee: FUJIFILM Corporation
    Inventor: Naotaka Wachi
  • Publication number: 20110234725
    Abstract: An ink-jet recording method, having the steps of: ejecting droplets of inks from an orifice of a recording head onto a recording sheet in response to recording signals; and heating the recording sheet to 70° C. or higher before the droplets of the ink land on the recording sheet or at the time of landing thereof, thereby to form a multi-order color image on the recording sheet, in which the inks are two or more kinds of inks that thicken by heating and have different color hues from each other, and the droplets of the inks are ejected in sequence from the ink having the lowest viscosity at 70° C. among the inks.
    Type: Application
    Filed: March 23, 2011
    Publication date: September 29, 2011
    Applicant: FUJIFILM CORPORATION
    Inventor: Naotaka WACHI
  • Publication number: 20110229643
    Abstract: An ink set containing at least one ink of which viscosity at 70° C. is 100 mPa·s or more, and at least one ink of which color hue is the same as the above ink and of which viscosity at 70° C. is 30 mPa·s or less.
    Type: Application
    Filed: March 17, 2011
    Publication date: September 22, 2011
    Applicant: FUJIFILM Corporation
    Inventor: Naotaka WACHI
  • Publication number: 20100242791
    Abstract: An inkjet ink composition includes a sulfoxide compound, a water-soluble dye having an aromatic heterocycle in a molecule, water and a water-soluble organic solvent, wherein the sulfoxide compound has a content of from 1% by weight to less than 10% by weight, based on the total weight of the composition. An inkjet recording method includes using an inkjet printer having a silicon oxide layer or a silane coupling layer in at least part of a component with which ink is brought into contact, and ejecting an inkjet ink composition from the inkjet printer to record an image on an inkjet recording medium, wherein the inkjet ink composition contains a sulfoxide compound, a water-soluble dye, and the sulfoxide compound has a content of from 1% by weight to less than 10% by weight, based on the total weight of the composition.
    Type: Application
    Filed: March 25, 2010
    Publication date: September 30, 2010
    Applicant: FUJIFILM CORPORATION
    Inventor: Naotaka WACHI
  • Patent number: 7776144
    Abstract: To provide inks and ink sets for inkjet recording, which have good fastness and good jet-out stability and which give good images with no bleeding trouble, yellow ink, black ink and magenta ink for inkjet printing contain at least two dyes each having an oxidation potential over 1.0 V (vs SCE).
    Type: Grant
    Filed: October 22, 2004
    Date of Patent: August 17, 2010
    Assignee: FUJIFILM Corporation
    Inventors: Toshiki Taguchi, Takashi Ozawa, Manabu Ogawa, Naotaka Wachi
  • Publication number: 20100080908
    Abstract: An ink set including a yellow ink, a magenta ink and a cyan ink, the magenta ink and at least one of the yellow ink or the cyan ink each containing an antioxidant having a sulfur atom in the molecule thereof, and the magenta ink containing a dye represented by the following formula (M-1), is provided.
    Type: Application
    Filed: September 16, 2009
    Publication date: April 1, 2010
    Applicant: FUJIFILM CORPORATION
    Inventors: Naotaka WACHI, Hideki KAIMOTO
  • Publication number: 20100071588
    Abstract: Disclosed is an inkjet recording yellow ink containing a water-soluble azo dye (yn1) selected from the group consisting of a compound represented by the following Formula (Y) in which n is 1, and a salt thereof, and a water-soluble azo dye (yn2) selected from the group consisting of a compound represented by the following Formula (Y) in which n is 2, and a salt thereof: wherein, in Formula (Y), G represents a heterocyclic group; R, X, Y, Z, and Q each independently represent a monovalent or divalent group; n represents 1 or 2; when n is 1, R, X, Y, Z, Q and G each independently represent a monovalent group; and when n is 2, R, X, Y, Z, Q and G each independently represent a monovalent or divalent group, and at least one of R, X, Y, Z, Q and G represents a divalent substituent.
    Type: Application
    Filed: August 28, 2009
    Publication date: March 25, 2010
    Applicant: FUJIFILM CORPORATION
    Inventor: Naotaka WACHI
  • Publication number: 20100075041
    Abstract: Disclosed is an inkjet recording yellow ink comprising at least one water-soluble azo dye selected from the group consisting of a compound represented by formula (Y) described below and a salt thereof and at least one glycol ether represented by formula (A) described below, wherein the glycol ether is contained in an amount of 25% by mass to 100% by mass relative to a total amount of water-soluble organic solvent in the ink.
    Type: Application
    Filed: June 26, 2009
    Publication date: March 25, 2010
    Applicant: FUJIFILM CORPORATION
    Inventors: Naotaka WACHI, Wataru ONO
  • Publication number: 20090246379
    Abstract: The present invention provides a method for forming an ink jet image, the method comprising forming an image by using an apparatus to form an image on an image-receiving material by an ink jet system with an ink for ink jet recording containing at least a water-soluble dye, water and a water-soluble organic solvent and, after image formation, discharge and stack a plurality of the image-receiving materials respectively having images formed thereon, wherein the water-soluble organic solvent is selected from a water-soluble diol and/or a pyrrolidone derivative each having an I/O value of 3.0 or more, and is contained in an amount of 40% by mass or more of the entire amount of water-soluble organic solvents in the ink for ink jet recording.
    Type: Application
    Filed: March 18, 2009
    Publication date: October 1, 2009
    Applicant: FUJIFILM Corporation
    Inventors: Naotaka Wachi, Hideki Kaimoto