Patents by Inventor Mami Hatanaka

Mami Hatanaka 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: 9724940
    Abstract: A recording method includes: ejecting aqueous ink to a surface of a recording medium by an ejection head, the aqueous ink containing a colorant, polymer particles having a glass-transition temperature Tg of 35° C. to 65° C., and a solvent containing water and an aqueous organic solvent, the aqueous ink having a viscosity ratio (V35/Vi) of a viscosity V35 that is obtained when the aqueous ink is heated at 35° C. for 30 minutes to an initial viscosity Vi of the aqueous ink being lower than 2.0 and a viscosity ratio (V65/Vi) of a viscosity V65 that is obtained when the aqueous ink is heated at 65° C. for 30 minutes to Vi being 8.0 to 20.0; and drying the aqueous ink ejected to the recording medium. The head temperature Th of the ejection head, the glass-transition temperature Tg, and the drying temperature Td satisfy an expression: Th<Tg<Td.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: August 8, 2017
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Hiroyuki Ueki, Mami Hatanaka, Toshitake Yui
  • Patent number: 9682574
    Abstract: A recording apparatus includes an ejecting head that ejects aqueous ink which includes a colorant, polymer particles, water, and an aqueous organic solvent, of which static surface tension is from 22 mN/m to 30 mN/m, and a difference between a value of dynamic surface tension after 10 msec and a value of dynamic surface tension after 1000 msec is greater than 2 mN/m and equal to or smaller than 10 mN/m, when dynamic surface tension is measured with a maximum bubble pressure technique, in an the ink droplet amount in a range of less than 10 pl.
    Type: Grant
    Filed: July 28, 2014
    Date of Patent: June 20, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Hiroyuki Ueki, Mami Hatanaka, Toshitake Yui
  • Patent number: 9663673
    Abstract: An ink includes pigment particles, polymer particles in such an amount that a total volume thereof is from 0.3 to 1.6 when a total volume of the pigment particles is taken as 1, water, and an aqueous organic solvent.
    Type: Grant
    Filed: February 10, 2016
    Date of Patent: May 30, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Hiroyuki Ueki, Mami Hatanaka
  • Patent number: 9522532
    Abstract: There is provided an ink jet recording apparatus equipped with an ink for ink jet recording, and a discharge unit that discharges a liquid droplet of the ink onto a recording medium, wherein the ink contains at least a colorant, a polymer particle, a water-soluble organic solvent, and water, and has a dynamic surface tension after 1 msec of 32 mN/m or less, a dynamic surface tension after 1 sec of less than 30 mN/m, when the dynamic surface tension is measured by a maximum bubble pressure method, and has a variation width in the dynamic surface tension for the period from 1 msec after to 1 sec after of from 0.2 mN/m to 3.0 mN/m, a recording speed is from 10 m/min to 50 m/min.
    Type: Grant
    Filed: February 12, 2015
    Date of Patent: December 20, 2016
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Hirohito Yoneyama, Hiroyuki Ueki, Mami Hatanaka, Reika Yomogida
  • Patent number: 9505235
    Abstract: A recording method includes ejecting an ink on an recording medium, wherein the ink includes a colorant, polymer particles, water, and an aqueous organic solvent, has a static surface tension of equal to or less than 30 mN/m, and has a fluctuation range of a dynamic surface tension from after 1 millisecond to after 1 second of from 0.2 mN/m to 2.0 mN/m when measuring the dynamic surface tension by a maximum bubble pressure method, and wherein the recording medium has a maximum liquid absorption amount of the ink within a contact time of 500 milliseconds measured by a dynamic scanning liquid absorption meter of equal to or greater than 5 ml/m2.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: November 29, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Mami Hatanaka, Hiroyuki Ueki, Reika Abe
  • Patent number: 9498976
    Abstract: There is provided an ultraviolet-curable aqueous ink containing: a continuous phase containing water; and a dispersed phase dispersed in the continuous phase, wherein the dispersed phase contains a water-insoluble ultraviolet polymerizable compound, and a water-insoluble ultraviolet polymerization initiator having an absorption at a wavelength range of 375 nm or more and 450 nm or less.
    Type: Grant
    Filed: December 12, 2013
    Date of Patent: November 22, 2016
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yoshiro Yamashita, Hiroyuki Ueki, Mami Hatanaka, Daisuke Nakashima, Toshitake Yui, Naoki Morita
  • Patent number: 9469099
    Abstract: There is provided a recording apparatus equipped with an ejection head that ejects an ink to a surface of the undercoat layer of an impermeable recording medium that has, on at least one surface thereof, an undercoat layer containing a polymeric compound selected from the group consisting of polyurethane, polyester, polyvinyl chloride, and polyolefin, wherein the ink contains a coloring agent, a polymer particle, water, and a water-soluble organic solvent and has a static surface tension of less than 30 mN/m and, when examined for dynamic surface tension by a maximum bubble pressure method, has a width of variation in dynamic surface tension for the period from 1 msec after to 1 sec after of from 0.2 mN/m to 3.0 mN/m.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: October 18, 2016
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Hirohito Yoneyama, Hiroyuki Ueki, Mami Hatanaka, Reika Yomogida
  • Patent number: 9458340
    Abstract: There is provided an aqueous ink which contains a coloring agent, a polymer particle, water and an aqueous organic solvent, and a surface resistivity of a film obtained by film formation on a glass plate is 1×106 ?/? or less, and a recording method containing: a first discharge step that discharges the first aqueous ink on a front surface of a recording medium; a first drying step that dries the first aqueous ink discharged on the front surface of the recording medium after the first discharge step; and a second discharge step that discharges a second aqueous ink on a rear surface of the recording medium after the first drying step.
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: October 4, 2016
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Hirohito Yoneyama, Mami Hatanaka, Hiroyuki Ueki
  • Publication number: 20160272829
    Abstract: An ink includes pigment particles, polymer particles in such an amount that a total volume thereof is from 0.3 to 1.6 when a total volume of the pigment particles is taken as 1, water, and an aqueous organic solvent.
    Type: Application
    Filed: February 10, 2016
    Publication date: September 22, 2016
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Hiroyuki UEKI, Mami HATANAKA
  • Patent number: 9447300
    Abstract: There is provided an ink comprising a colorant, a polymer particle, water, and a water-soluble organic solvent, wherein the ink has a static surface tension of 30 mN/m or less and, when examined for dynamic surface tension by the maximum bubble pressure method, has a width of variations in dynamic surface tension, for a period from 1 msec after to 1 sec after, of 0.2 mN/m to 3.0 mN/m.
    Type: Grant
    Filed: August 14, 2014
    Date of Patent: September 20, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Hiroyuki Ueki, Mami Hatanaka, Hirohito Yoneyama, Reika Abe
  • Publication number: 20160222240
    Abstract: There is provided an aqueous ink which contains a coloring agent, a polymer particle, water and an aqueous organic solvent, and a surface resistivity of a film obtained by film formation on a glass plate is 1×106?/? or less, and a recording method containing: a first discharge step that discharges the first aqueous ink on a front surface of a recording medium; a first drying step that dries the first aqueous ink discharged on the front surface of the recording medium after the first discharge step; and a second discharge step that discharges a second aqueous ink on a rear surface of the recording medium after the first drying step.
    Type: Application
    Filed: July 28, 2015
    Publication date: August 4, 2016
    Inventors: Hirohito Yoneyama, Mami Hatanaka, Hiroyuki Ueki
  • Publication number: 20160082726
    Abstract: There is provided an ink jet recording apparatus equipped with an ink for ink jet recording, and a discharge unit that discharges a liquid droplet of the ink onto a recording medium, wherein the ink contains at least a colorant, a polymer particle, a water-soluble organic solvent, and water, and has a dynamic surface tension after 1 msec of 32 mN/m or less, a dynamic surface tension after 1 sec of less than 30 mN/m, when the dynamic surface tension is measured by a maximum bubble pressure method, and has a variation width in the dynamic surface tension for the period from 1 msec after to 1 sec after of from 0.2 mN/m to 3.0 mN/m, a recording speed is from 10 m/min to 50 m/min.
    Type: Application
    Filed: February 12, 2015
    Publication date: March 24, 2016
    Inventors: Hirohito Yoneyama, Hiroyuki Ueki, Mami Hatanaka, Reika Yomogida
  • Publication number: 20160023456
    Abstract: There is provided a recording apparatus equipped with an ejection head that ejects an ink to a surface of the undercoat layer of an impermeable recording medium that has, on at least one surface thereof, an undercoat layer containing a polymeric compound selected from the group consisting of polyurethane, polyester, polyvinyl chloride, and polyolefin, wherein the ink contains a coloring agent, a polymer particle, water, and a water-soluble organic solvent and has a static surface tension of less than 30 mN/m and, when examined for dynamic surface tension by a maximum bubble pressure method, has a width of variation in dynamic surface tension for the period from 1 msec after to 1 sec after of from 0.2 mN/m to 3.0 mN/m.
    Type: Application
    Filed: January 29, 2015
    Publication date: January 28, 2016
    Inventors: Hirohito Yoneyama, Hiroyuki Ueki, Mami Hatanaka, Reika Yomogida
  • Publication number: 20160001579
    Abstract: A recording method includes ejecting an ink on an recording medium, wherein the ink includes a colorant, polymer particles, water, and an aqueous organic solvent, has a static surface tension of equal to or less than 30 mN/m, and has a fluctuation range of a dynamic surface tension from after 1 millisecond to after 1 second of from 0.2 mN/m to 2.0 mN/m when measuring the dynamic surface tension by a maximum bubble pressure method, and wherein the recording medium has a maximum liquid absorption amount of the ink within a contact time of 500 milliseconds measured by a dynamic scanning liquid absorption meter of equal to or greater than 5 ml/m2.
    Type: Application
    Filed: January 22, 2015
    Publication date: January 7, 2016
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Mami HATANAKA, Hiroyuki UEKI, Reika ABE
  • Publication number: 20150267067
    Abstract: There is provided an ink comprising a colorant, a polymer particle, water, and a water-soluble organic solvent, wherein the ink has a static surface tension of 30 mN/m or less and, when examined for dynamic surface tension by the maximum bubble pressure method, has a width of variations in dynamic surface tension, for a period from 1 msec after to 1 sec after, of 0.2 mN/m to 3.0 mN/m.
    Type: Application
    Filed: August 14, 2014
    Publication date: September 24, 2015
    Inventors: Hiroyuki UEKI, Mami HATANAKA, Hirohito YONEYAMA, Reika ABE
  • Publication number: 20150251452
    Abstract: A recording device includes an ejection head that ejects aqueous ink including a colorant, polymer particles, a light-absorbing and heat-generating agent, water, and an aqueous organic solvent, and a light irradiation device that irradiates the aqueous ink with light within one second after the aqueous ink ejected from the ejection head lands.
    Type: Application
    Filed: February 19, 2015
    Publication date: September 10, 2015
    Inventors: Mami HATANAKA, Hiroyuki UEKI, Toshitake YUI
  • Publication number: 20150251456
    Abstract: A recording apparatus includes an ejecting head that ejects aqueous ink which includes a colorant, polymer particles, water, and an aqueous organic solvent, of which static surface tension is from 22 mN/m to 30 mN/m, and a difference between a value of dynamic surface tension after 10 msec and a value of dynamic surface tension after 1000 msec is greater than 2 mN/m and equal to or smaller than 10 mN/m, when dynamic surface tension is measured with a maximum bubble pressure technique, in an the ink droplet amount in a range of less than 10 pl.
    Type: Application
    Filed: July 28, 2014
    Publication date: September 10, 2015
    Inventors: Hiroyuki UEKI, Mami HATANAKA, Toshitake YUI
  • Patent number: 9114638
    Abstract: A droplets drying device includes: an illuminating unit that applies infrared laser light to droplets that have been ejected onto a recording medium by an ejecting unit that ejects droplets in accordance with an image to be formed; and a control unit that controls at least one of timing, a position or positions, and an amount or amounts of application of infrared laser light to the droplets by the illuminating unit in accordance with an attribute that influences image quality of an image formed.
    Type: Grant
    Filed: June 10, 2014
    Date of Patent: August 25, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yasuhiro Ogasawara, Naoki Morita, Manabu Numata, Akira Sakamoto, Mami Hatanaka, Yukari Motosugi, Takeshi Zengo, Jun Isozaki, Takehiro Niitsu, Atsushi Murakami, Masaki Kobayashi
  • Patent number: 9056999
    Abstract: There is provided an ultraviolet-curable aqueous ink containing: an ultraviolet polymerizable compound; a water-insoluble thioxanthone compound having an absorption at a wavelength range of 375 nm or more and 450 nm or less, a water-insoluble tertiary amine compound, water, and a water-soluble organic solvent at least including a solvent (A) that dissolves the thioxanthone compound and the tertiary amine compound.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: June 16, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yoshiro Yamashita, Hiroyuki Ueki, Mami Hatanaka, Toshitake Yui
  • Publication number: 20150158311
    Abstract: A droplets drying device includes: an illuminating unit that applies infrared laser light to droplets that have been ejected onto a recording medium by an ejecting unit that ejects droplets in accordance with an image to be formed; and a control unit that controls at least one of timing, a position or positions, and an amount or amounts of application of infrared laser light to the droplets by the illuminating unit in accordance with an attribute that influences image quality of an image formed.
    Type: Application
    Filed: June 10, 2014
    Publication date: June 11, 2015
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yasuhiro Ogasawara, Naoki Morita, Manabu Numata, Akira Sakamoto, Mami Hatanaka, Yukari Motosugi, Takeshi Zengo, Jun Isozaki, Takehiro Niitsu, Atsushi Murakami, Masaki Kobayashi