Patents by Inventor Mitsuru Naruse

Mitsuru Naruse 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: 11628617
    Abstract: Provided is a three-dimensional object formation method for forming a three-dimensional object by at least repeating: forming a powder material layer using a powder material for three-dimensional object formation containing a base material coated with an organic material; and hardening a predetermined region of the powder material layer by delivering a hardening liquid to the powder material layer formed in the formation of a powder material layer, where the hardening liquid contains a cross-linking agent cross-linkable with the organic material.
    Type: Grant
    Filed: October 22, 2020
    Date of Patent: April 18, 2023
    Assignee: RICOH COMPANY, LTD.
    Inventors: Teruki Kusahara, Masaki Watanabe, Keiko Osaka, Mitsuru Naruse, Mariko Kojima, Yasuyuki Yamashita, Yoshihiro Norikane
  • Patent number: 11590685
    Abstract: A fiber aggregation contains fiber containing a thermoplastic resin, each of the fiber being mutually joined and aligned.
    Type: Grant
    Filed: September 3, 2019
    Date of Patent: February 28, 2023
    Assignee: RICOH COMPANY, LTD.
    Inventors: Sohichiroh Iida, Hitoshi Iwatsuki, Mitsuru Naruse, Satoshi Ogawa, Yunsheng Sun
  • Patent number: 11472958
    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: Grant
    Filed: February 6, 2019
    Date of Patent: October 18, 2022
    Assignee: RICOH COMPANY, LTD.
    Inventors: Mitsuru Naruse, Akira Saito, Hitoshi Iwatsuki, Yasuyuki Yamashita, Toshiyuki Mutoh, Yasutomo Aman, Kiichi Kamoda, Sohichiroh Iida, Shinzo Higuchi, Toshiyuki Iseki
  • Patent number: 11241825
    Abstract: A resin powder contains a resin, wherein the proportion of fine powder having a number diameter of 40 percent or less of a mean number diameter Mn of the resin powder is 30 percent or less in the resin powder.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: February 8, 2022
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yunsheng Sun, Toshiyuki Mutoh, Hitoshi Iwatsuki, Shigenori Yaguchi, Mitsuru Naruse, Sohichiroh Iida
  • Publication number: 20210292541
    Abstract: Provided is a resin powder containing a polyolefin-based resin, wherein the average circularity of the resin powder is 0.950 or greater, a logarithmically converted value Log R of the volume resistivity R of the resin powder is 11.5 or less, and the degree of compression of the resin powder is 1.45 or less. An embodiment where the volume average particle diameter of the resin powder is 10 micrometers or greater but 150 micrometers or less, an embodiment where the resin powder further contains an antistatic agent, an embodiment where the antistatic agent is water-insoluble, and an embodiment where the content of the antistatic agent is 0.5% by mass or greater but less than 20% by mass relative to the total amount of the resin powder are preferable.
    Type: Application
    Filed: March 11, 2021
    Publication date: September 23, 2021
    Applicant: Ricoh Company, Ltd.
    Inventors: Satoshi OGAWA, Tomoharu Miki, Mitsuru Naruse
  • Publication number: 20210292539
    Abstract: Provided is a resin powder including first particles containing a polyolefin-based resin, wherein surfaces of the first particles are coated with second particles at an average coating ratio of 0.15 or greater, where the average coating ratio is measured with a Material Development Kit (MDK) at a temperature lower than a melting point of the resin powder for producing a three-dimensional object by 15 degrees C.
    Type: Application
    Filed: March 8, 2021
    Publication date: September 23, 2021
    Applicant: Ricoh Company, Ltd.
    Inventors: Tomoharu Miki, Satoshi Ogawa, Mitsuru Naruse
  • Patent number: 11045978
    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: Grant
    Filed: November 8, 2018
    Date of Patent: June 29, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Hitoshi Iwatsuki, Yasuyuki Yamashita, Kiichi Kamoda, Toshiyuki Mutoh, Yasutomo Aman, Toshiyuki Iseki, Mitsuru Naruse, Akira Saito, Shinzo Higuchi, Sohichiroh Iida
  • Patent number: 10828827
    Abstract: Provided is a three-dimensional object formation method for forming a three-dimensional object by at least repeating: forming a powder material layer using a powder material for three-dimensional object formation containing a base material coated with an organic material; and hardening a predetermined region of the powder material layer by delivering a hardening liquid to the powder material layer formed in the formation of a powder material layer, where the hardening liquid contains a cross-linking agent cross-linkable with the organic material.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: November 10, 2020
    Assignee: RICOH COMPANY, LTD.
    Inventors: Teruki Kusahara, Masaki Watanabe, Keiko Osaka, Mitsuru Naruse, Mariko Kojima, Yasuyuki Yamashita, Yoshihiro Norikane
  • Patent number: 10823372
    Abstract: A switch device includes a display device including a polarization plate including a first polarization layer that transmits a linear polarization component oscillating in a first direction, and a second polarization layer that transmits a linear polarization component oscillating in a second direction, the first and second polarization layers being stacked directly on top of one another so that the first direction is orthogonal to the second direction, a first light source unit that outputs the linear polarization component oscillating in the first direction, and a second light source unit that outputs the linear polarization component oscillating in the second direction, a switch section that performs switching between the light emitting state and the non-light emitting state of the first and second light source units, and an operating section that operates the switch section, wherein the polarization plate is provided in the operating section.
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: November 3, 2020
    Assignee: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO
    Inventor: Mitsuru Naruse
  • Patent number: 10711977
    Abstract: A display switching device includes a light source emitting light having a first polarization direction and light having a second polarization direction different from the first polarization direction, a first polarizing plate having a first display region configured to transmit light in the first polarization direction and display a first display mark, and a second polarizing plate having a second display region configured to transmit light in the second polarization direction and display a second display mark. The second polarizing plate is arranged such that the first display region at least partially overlaps with the second display region. At least a part of one of the first display region and the second display region includes a mixed part in which a polarization part with a polarizing function and a non-polarization part without any polarizing function are mixed.
    Type: Grant
    Filed: April 3, 2018
    Date of Patent: July 14, 2020
    Assignee: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO
    Inventors: Masato Kozuka, Mitsuru Naruse
  • Publication number: 20200070412
    Abstract: A resin powder contains a resin, wherein the proportion of fine powder having a number diameter of 40 percent or less of a mean number diameter Mn of the resin powder is 30 percent or less in the resin powder.
    Type: Application
    Filed: August 29, 2019
    Publication date: March 5, 2020
    Inventors: Yunsheng SUN, Toshiyuki Mutoh, Hitoshi Iwatsuki, Shigenori Yaguchi, Mitsuru Naruse, Sohichiroh IIDA
  • 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
  • Patent number: 10293555
    Abstract: Provided is a liquid material for forming a three-dimensional object. The liquid material is adapted to harden a powder material for forming a three-dimensional object containing an organic material. The liquid material contains a solvent and a cross-linking agent. A dynamic contact angle of the liquid material over a film made of the organic material is from 20° to 80°.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: May 21, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Mariko Kojima, Yoshihiro Norikane, Keiko Osaka, Hiroshi Iwata, Mitsuru Naruse, Nozomu Tamoto
  • Patent number: 10295727
    Abstract: A display device includes a polarizing layer having a polarizing function for reflecting or absorbing light polarized in a stretching direction of a pigment, a first display panel in which the polarizing function is disabled in a first region, a second display panel in which the polarizing function is disabled in a second region, and a light source that emits an illumination light having a polarization direction along the stretching direction or a direction perpendicular to the stretching direction. The first display panel and the second display panel are stacked together to form a display unit. Only the first region is displayed on the display unit by emitting illumination light having a polarization direction along the stretching direction of the first display panel. Only the second region is displayed on the display unit by emitting illumination light having a polarization direction along the stretching direction of the second display panel.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: May 21, 2019
    Assignee: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO
    Inventors: Mitsuru Naruse, Hiroshi Yoshida
  • Publication number: 20180215917
    Abstract: A resin composition for solid freeform fabrication includes one or more thermoplastic resins containing a liquid crystal resin having a content rate of from 0.5 to 40 percent by mass to the one or more thermoplastic resins.
    Type: Application
    Filed: January 22, 2018
    Publication date: August 2, 2018
    Inventor: Mitsuru Naruse
  • Patent number: 10030154
    Abstract: A powder material for three-dimensional modeling includes a base particle and a resin including a first water soluble resin and a second water soluble resin, wherein a first aqueous solution of the first water soluble resin having a concentration of two percent by mass has a thermally reversible sol-gel phase transition and is gelated at temperatures higher than a first phase transition temperature of the first aqueous solution.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: July 24, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Mitsuru Naruse, Yasuo Suzuki, Nozomu Tamoto, Yasuyuki Yamashita, Hitoshi Iwatsuki, Kazumi Ohtaki
  • Patent number: 9873228
    Abstract: A powder material for three-dimensional modeling includes a base particle and a resin covering the base particle, wherein the resin has a first absorption peak in the range of from 1,141 cm?1 to 1,145 cm?1 and a second absorption peak in the range of from 1,089 cm?1 to 1,093 cm?1 in an infrared absorption spectrum and the intensity ratio of the first absorption peak to the second absorption peak is from 0.40 to 0.70.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: January 23, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuo Suzuki, Mitsuru Naruse, Hitoshi Iwatsuki, Nozomu Tamoto, Kazumi Ohtaki, Yasuyuki Yamashita
  • Patent number: 9782935
    Abstract: A powder material for three-dimensional modeling includes a base particle and a coverage film including an organic material. The coverage film covers the base particle. The powder material is used for three dimensional modeling and when the coverage film is dissolved in a solvent to prepare a solution and the solution is formed into a coated film on a smooth surface, the coated film has a wetting tension of from 22 mN/m to 28 mN/m.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: October 10, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuyuki Yamashita, Yasuo Suzuki, Mitsuru Naruse, Nozomu Tamoto, Shigenori Yaguchi, Hitoshi Iwatsuki, Kazumi Ohtaki
  • Patent number: 9752037
    Abstract: An inkjet recording ink, including: water; a water-soluble organic solvent; a pigment; and a phosphate group-containing copolymer, wherein the phosphate group-containing copolymer contains a structural unit represented by the following General Formula (1) and a structural unit represented by the following General Formula (2): where R1 denotes a hydrogen atom or a methyl group; M+ denotes an alkali metal ion, an organic amine ion, or a hydrogen ion; half or more of M+ in the copolymer is the alkali metal ion or the organic amine ion, the remainder of M+ is the hydrogen ion; n and m each denote an integer of 0 to 6, provided that both of n and m are not 0; and a block of (C2H4O) and a block of (C3H6O) may be exchanged with each other, where R2 denotes a hydrogen atom or a methyl group.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: September 5, 2017
    Assignees: Ricoh Company, Ltd., GOO CHEMICAL CO., LTD.
    Inventors: Minoru Hakiri, Mitsuru Naruse, Masayasu Nonogaki, Keita Katoh, Akihiko Matsuyama, Kazukiyo Nagai, Yuusuke Koizuka, Masato Matsumura, Takuya Furuta
  • Patent number: 9708502
    Abstract: A powder for 3D modeling includes a base particle and a resin having a functional group represented by the following Chemical formula 1, where A1 represents O or NH and R1, R2, and R3 each, independently represent CH3, C2H5, C3H7, or C4H9. The base particle is covered with the resin.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: July 18, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Mitsuru Naruse, Nozomu Tamoto, Yasuo Suzuki, Hitoshi Iwatsuki, Yasuyuki Yamashita, Kazumi Ohtaki