Patents by Inventor Shinzo Higuchi

Shinzo Higuchi 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: 20200398458
    Abstract: Provided is a resin particle producing method including: a fiber aggregate producing step of directly joining fibers containing a thermoplastic resin with each other to obtain a fiber aggregate; and a particle forming step of forming the fiber aggregate into particles to obtain resin particles.
    Type: Application
    Filed: November 9, 2018
    Publication date: December 24, 2020
    Inventors: Nozomu TAMOTO, Hitoshi IWATSUKI, Yasuo SUZUKI, Yasuyuki YAMASHITA, Sohichiroh IIDA, Shinzo HIGUCHI, Akira SAITO, Kiichi KAMODA, Yoshihiko FURUGOHRI, Shinsuke NAGAI
  • Publication number: 20200362142
    Abstract: Provided is a thermoplastic resin powder, including a heat-resistant antistatic agent in an amount of 0.01% by mass or greater but 30.0% by mass or less. Also provided is a resin powder, including resin particles and resin fine particles having a number-based primary particle diameter of 1.50 micrometers or less.
    Type: Application
    Filed: May 14, 2020
    Publication date: November 19, 2020
    Inventors: Akira SAITO, Yasuyuki YAMASHITA, Satoshi OGAWA, Yunsheng SUN, Shinzo HIGUCHI
  • Patent number: 10800096
    Abstract: A resin powder for solid freeform fabrication includes resin particles having a significantly pillar-like form including resin particles having a concave portion on the circumferential side surface.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: October 13, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Sohichiroh Iida, Shigenori Yaguchi, Hitoshi Iwatsuki, Yasuo Suzuki, Nozomu Tamoto, Shinzo Higuchi, Akira Saito, Yasuyuki Yamashita, Kiichi Kamoda
  • Publication number: 20200016827
    Abstract: Provided is a resin powder for producing a three-dimensional object, wherein the resin powder has a number-average equivalent circle diameter of 10 micrometers or greater but 150 micrometers or less, and wherein a median in an equivalent circle diameter-based particle size distribution of the resin powder is higher than the average equivalent circle diameter.
    Type: Application
    Filed: March 7, 2018
    Publication date: January 16, 2020
    Inventors: Yasuyuki YAMASHITA, Akira SAITO, Sohichiroh IIDA, Hitoshi IWATSUKI, Yasuo SUZUKI, Nozomu TAMOTO, Kiichi KAMODA, Shigenori YAGUCHI, Shinzo HIGUCHI, Toshiyuki ISEKI, Yasutomo AMAN, Toshiyuki MUTOH, Mitsuru NARUSE
  • Publication number: 20190241734
    Abstract: A powder for solid freeform fabrication includes a first resin particle and a second resin particle, wherein MFR2 is greater than MFR1 and a ratio of MFR2 to MFR1 is from 2 to 5, where MFR1 represents a melt mass-flow rate (MFR) of the first resin particle and MFR2 represents a melt mass-flow rate of the second resin particle.
    Type: Application
    Filed: February 6, 2019
    Publication date: August 8, 2019
    Inventors: Mitsuru Naruse, Akira Saito, Hitoshi Iwatsuki, Yasuyuki Yamashita, Toshiyuki Mutoh, Yasutomo Aman, Kiichi Kamoda, Sohichiroh Iida, Shinzo Higuchi, Toshiyuki Iseki
  • Publication number: 20190134853
    Abstract: A particle for solid freeform fabrication having a columnar form has end surfaces and a side surface, wherein one of the end surfaces partially covers the side surface.
    Type: Application
    Filed: November 8, 2018
    Publication date: May 9, 2019
    Inventors: Hitoshi IWATSUKI, Yasuyuki YAMASHITA, Kiichi KAMODA, Toshiyuki MUTOH, Yasutomo AMAN, Toshiyuki ISEKI, Mitsuru NARUSE, Akira SAITO, Shinzo HIGUCHI, Sohichiroh IIDA
  • Publication number: 20180355144
    Abstract: A resin powder for solid freeform fabrication, having a melting point of 100 degrees C. or higher as measured according to ISO 3146 regulation and a ratio of melt mass-flow rate B to melt mass-flow rate A of greater than 0.80 to 1.20, wherein the melt mass-flow rate A and the melt mass-flow rate B are respectively measured at 15 degrees C. higher than the melting point under a load of 2.16 kg according to JIS K7210 format before and after the resin powder is maintained at a temperature 15 degrees C. lower than the melting point under a pressure of 0.1 kPa for four hours.
    Type: Application
    Filed: June 13, 2018
    Publication date: December 13, 2018
    Inventors: Akira SAITO, Shigenori YAGUCHI, Yasuo SUZUKI, Nozomu TAMOTO, Shinzo HIGUCHI, Hitoshi IWATSUKI
  • Publication number: 20180273756
    Abstract: Provided is a water-disintegrable resin composition including at least a water-soluble resin (A) and an acidic substance (B).
    Type: Application
    Filed: May 29, 2018
    Publication date: September 27, 2018
    Inventors: Akira SAITO, Yasuo SUZUKI, Mitsuru NARUSE, Nozomu TAMOTO, Shinzo HIGUCHI
  • Publication number: 20180264720
    Abstract: A resin powder for solid freeform fabrication contains pillar-like form particles having an average circularity of 0.83 or greater in a particle diameter range of from 0.5 to 200 ?m.
    Type: Application
    Filed: March 12, 2018
    Publication date: September 20, 2018
    Inventors: Nozomu TAMOTO, Sohichiroh IIDA, Akira SAITO, Yasuyuki YAMASHITA, Hitoshi IWATSUKI, Shinzo HIGUCHI, Kiichi KAMODA
  • Publication number: 20180264721
    Abstract: A resin powder for solid freeform fabrication includes resin particles having a significantly pillar-like form including resin particles having a concave portion on the circumferential side surface.
    Type: Application
    Filed: March 13, 2018
    Publication date: September 20, 2018
    Inventors: Sohichiroh IIDA, Shigenori Yaguchi, Hitoshi Iwatsuki, Yasuo Suzuki, Nozomu Tamoto, Shinzo Higuchi, Akira Saito, Yasuyuki Yamashita, Kiichi Kamoda
  • Publication number: 20180147780
    Abstract: A method of manufacturing a solid freeform fabrication object includes forming a layer of resin powder for solid freeform fabrication including particles having a pillar-like form and solidifying a particular area of the layer with irradiation of laser beams, wherein the laser beams have an energy intensity distribution having a top hat-like form.
    Type: Application
    Filed: November 27, 2017
    Publication date: May 31, 2018
    Inventors: Kiichi KAMODA, Yasuyuki YAMASHITA, Akira SAITO, Sohichiroh IIDA, Shinzo HIGUCHI, Hitoshi IWATSUKI, Nozomu TAMOTO, Yasuo SUZUKI
  • Publication number: 20180023219
    Abstract: A resin powder for solid freeform fabrication includes a particle having a pillar-like form, wherein the ratio of the height of the particle to the diameter or the long side of the bottom of the particle is 0.5 to 2.0, the particle has a 50 percent cumulative volume particle diameter of from 5 to 200 ?m, and the ratio (Mv/Mn) of the volume average particle diameter (Mv) to the number average particle diameter (Mn) of the particle is 2.00 or less.
    Type: Application
    Filed: July 21, 2017
    Publication date: January 25, 2018
    Inventors: Akira SAITO, Shigenori YAGUCHI, Yasuyuki YAMASHITA, Kiichi KAMODA, Yasuo SUZUKI, Nozomu TAMOTO, Hitoshi IWATSUKI, Shinzo HIGUCHI, Sohichiroh IIDA
  • Publication number: 20180022024
    Abstract: A resin powder for solid freeform fabrication has a 50 percent cumulative volume particle diameter of from 5 to 100 ?m and a ratio (Mv/Mn) of a volume average particle diameter (Mv) to the number average particle diameter (Mn) of 2.50 or less and satisfies at least one of the following conditions (1) to (3): (1): Tmf1>Tmf2 and (Tmf1?Tmf2)?3 degrees C., both Tmf1 and Tmf2 are measured in differential scanning calorimetry measuring according to ISO 3146, (2): Cd1>Cd2 and (Cd1?Cd2)?3 percent, both Cd1 and Cd2 are measured in differential scanning calorimetry measuring according to ISO 3146, and (3): C×1>C×2 and (C1?C2)?3 percent.
    Type: Application
    Filed: July 21, 2017
    Publication date: January 25, 2018
    Inventors: Akira SAITO, Yasuyuki YAMASHITA, Kiichi KAMODA, Shigenori YAGUCHI, Nozomu TAMOTO, Hitoshi IWATSUKI, Shinzo HIGUCHI, Sohichiroh llDA, Yasuo SUZUKI
  • Publication number: 20170225404
    Abstract: A solid freeform fabrication material having a dissolution starting point in a pH range of 7.5-10.
    Type: Application
    Filed: January 27, 2017
    Publication date: August 10, 2017
    Inventors: Mitsuru NARUSE, Shinzo HIGUCHI, Akira SAITO, Yasuo SUZUKI, Nozomu TAMOTO
  • Publication number: 20170217087
    Abstract: A solid freeform fabrication material includes a water-soluble core material and a water-insoluble coating material formed on the surface of the water-soluble core material.
    Type: Application
    Filed: January 23, 2017
    Publication date: August 3, 2017
    Inventors: Nozomu TAMOTO, Yasuo SUZUKI, Akira SAITO, Mitsuru NARUSE, Shinzo HIGUCHI
  • Patent number: 8647802
    Abstract: To provide a toner manufacturing method including: continuously mixing an oil phase with an aqueous phase to form an emulsified liquid using an emulsifying mechanism having an emulsified liquid circulation pathway and an emulsifying device equipped with a stirring blade; forming liquid droplets from the emulsified liquid by controlling the equilibrium between atomization and integration of the liquid droplets; and feeding the liquid droplets with stirring to a series of treatments including at least desolvation, filtration, washing and drying; wherein a product T of the solid content concentration (% by mass) of the oil phase and viscosity (mPa·s) measured with a rotating viscometer at 25° C., and 6 rpm satisfies 30,000?T?50,000.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: February 11, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinzo Higuchi, Hiroshi Takahashi
  • Publication number: 20080311504
    Abstract: A method of manufacturing toner including adding an oil phase comprising an organic solvent in which a binder resin, a coloring agent and a releasing agent are dissolved or dispersed and an aqueous phase to an emulsification device equipped with a stirrer, continuously dispersing or emulsifying the oil phase and the aqueous phase in the emulsification device equipped with a stirrer to form a liquid dispersion or emulsion comprising oil phase particles, transporting the liquid dispersion or emulsion to a tank, removing the organic solvent from the liquid dispersion or emulsion followed by drying to form mother toner particles, wherein the releasing agent has been preliminarily prepared to have a dispersion diameter of from 0.15 to 0.
    Type: Application
    Filed: May 21, 2008
    Publication date: December 18, 2008
    Inventors: Mizuki HATTORI, Shinzo Higuchi, Takahiro Kadota, Daisuke Misawa, Hiroshi Takahashi, Toshihiko Usami, Masashi Miyakawa
  • Publication number: 20080220348
    Abstract: To provide a toner manufacturing method including: continuously mixing an oil phase with an aqueous phase to form an emulsified liquid using an emulsifying mechanism having an emulsified liquid circulation pathway and an emulsifying device equipped with a stirring blade; forming liquid droplets from the emulsified liquid by controlling the equilibrium between atomization and integration of the liquid droplets; and feeding the liquid droplets with stirring to a series of treatments including at least desolvation, filtration, washing and drying; wherein a product T of the solid content concentration (% by mass) of the oil phase and viscosity (mPa·s) measured with a rotating viscometer at 25° C., and 6 rpm satisfies 30,000?T?50,000.
    Type: Application
    Filed: March 6, 2008
    Publication date: September 11, 2008
    Inventors: Shinzo Higuchi, Hiroshi Takahashi