Patents by Inventor Sohichiroh IIDA

Sohichiroh IIDA 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).

  • Resin powder for solid freeform fabrication, device for solid freeform fabrication object, and method of manufacturing solid freeform fabrication object
    Patent number: 11926931
    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: Grant
    Filed: June 14, 2021
    Date of Patent: March 12, 2024
    Assignee: Ricoh Company, Ltd.
    Inventors: Akira Saito, Shigenori Yaguchi, Yasuyuki Yamashita, Kiichi Kamoda, Yasuo Suzuki, Nozomu Tamoto, Hitoshi Iwatsuki, Shinzo Higuchi, Sohichiroh Iida
  • Fiber aggregation, short fiber and method of manufacturing the same, and film and method of manufacturing the same
    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
  • Resin particle producing method
    Patent number: 11504883
    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: Grant
    Filed: November 9, 2018
    Date of Patent: November 22, 2022
    Assignee: Ricoh Company, Ltd.
    Inventors: Nozomu Tamoto, Hitoshi Iwatsuki, Yasuo Suzuki, Yasuyuki Yamashita, Sohichiroh Iida, Shinzo Higuchi, Akira Saito, Kiichi Kamoda, Yoshihiko Furugohri, Shinsuke Nagai
  • Resin powder for solid freeform fabrication, device for solid freeform fabrication object, and method of manufacturing solid freeform fabrication object
    Patent number: 11491713
    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 (C×1?C×2)?3 percent.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: November 8, 2022
    Assignee: Ricoh Company, Ltd.
    Inventors: Akira Saito, Yasuyuki Yamashita, Kiichi Kamoda, Shigenori Yaguchi, Nozomu Tamoto, Hitoshi Iwatsuki, Shinzo Higuchi, Sohichiroh Iida, Yasuo Suzuki
  • Powder for solid freeform fabrication and method of manufacturing solid freeform fabrication object
    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
  • METHOD OF MANUFACTURING SOLID FREEFORM FABRICATION OBJECT AND DEVICE FOR MANUFACTURING SOLID FREEFORM FABRICATION OBJECT
    Publication number: 20220176625
    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: February 23, 2022
    Publication date: June 9, 2022
    Applicant: Ricoh Company, Ltd.
    Inventors: Kiichi Kamoda, Yasuyuki Yamashita, Akira Saito, Sohichiroh Iida, Shinzo Higuchi, Hitoshi Iwatsuki, Nozomu Tamoto, Yasuo Suzuki
  • RESIN POWDER FOR SOLID FREEFORM FABRICATION, DEVICE FOR SOLID FREEFORM FABRICATION OBJECT, AND METHOD OF MANUFACTURING SOLID FREEFORM FABRICATION OBJECT
    Publication number: 20220048245
    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): Cx1>Cx2 and (Cx1?Cx2)?3 percent.
    Type: Application
    Filed: October 28, 2021
    Publication date: February 17, 2022
    Inventors: Akira Saito, Yasuyuki Yamashita, Kiichi Kamoda, Shigenori Yaguchi, Nozomu Tamoto, Hitoshi Iwatsuki, Shinzo Higuchi, Sohichiroh Iida, Yasuo Suzuki
  • Resin powder, device for solid freeform fabrication object, and method of manufacturing solid freeform fabrication object
    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
  • RESIN POWDER FOR SOLID FREEFORM FABRICATION AND DEVICE FOR SOLID FREEFORM FABRICATION OBJECT
    Publication number: 20210402680
    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: September 13, 2021
    Publication date: December 30, 2021
    Inventors: Nozomu Tamoto, Sohichiroh Iida, Akira Saito, Yasuyuki Yamashita, Hitoshi Iwatsuki, Shinzo Higuchi, Kiichi Kamoda
  • RESIN POWDER FOR SOLID FREEFORM FABRICATION, DEVICE FOR SOLID FREEFORM FABRICATION OBJECT, AND METHOD OF MANUFACTURING SOLID FREEFORM FABRICATION OBJECT
    Publication number: 20210317601
    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: June 14, 2021
    Publication date: October 14, 2021
    Inventors: Akira Saito, Shigenori Yaguchi, Yasuyuki Yamashita, Kiichi Kamoda, Yasuo Suzuki, Nozomu Tamoto, Hitoshi Iwatsuki, Shinzo Higuchi, Sohichiroh Iida
  • Resin powder having pillar shape and specific circularity for solid freeform fabrication, device for solid freeform fabrication object, and method of manufacturing solid freeform fabrication object
    Patent number: 11066758
    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: Grant
    Filed: July 21, 2017
    Date of Patent: July 20, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Akira Saito, Shigenori Yaguchi, Yasuyuki Yamashita, Kiichi Kamoda, Yasuo Suzuki, Nozomu Tamoto, Hitoshi Iwatsuki, Shinzo Higuchi, Sohichiroh Iida
  • Particle for solid freeform fabrication, powder for solid freeform fabrication, device for manufacturing solid freeform fabrication object, method of manufacturing solid freeform fabrication object, and particle
    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
  • RESIN POWDER FOR SOLID FREEFORM FABRICATION, DEVICE FOR FABRICATING SOLID FREEFORM FABRICATION OBJECT, AND METHOD OF FABRICATING SOLID FREEFORM FABRICATION OBJECT
    Publication number: 20210023778
    Abstract: A resin powder for solid freeform fabrication is provided which maintains the degree of smoothness of a thin layer formed with the resin powder for solid freeform fabrication even when the speed of supplying the resin powder for solid freeform fabrication using a recoater is increased and reduce lowering of the degree of smoothness of the thin layer caused by the resin powder for solid freeform fabrication that has scattered and accumulated on the recoater and others.
    Type: Application
    Filed: July 23, 2020
    Publication date: January 28, 2021
    Inventors: Sohichiroh Iida, Hitoshi Iwatsuki, Satoshi Ogawa, Yunsheng Sun
  • RESIN PARTICLE PRODUCING METHOD
    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
  • Resin powder for solid freeform fabrication and device for solid freeform fabrication object
    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
  • RESIN POWDER, METHOD OF MANUFACTURING SOLID FREEFORM FABRICATION OBJECT, AND DEVICE FOR MANUFACTURING SOLID FREEFORM FABRICATION OBJECT
    Publication number: 20200079011
    Abstract: A resin powder contains a resin containing particles, wherein the proportion of the particles in an aspect ratio range X represented by the following inequality 1 is 50 percent by number or more in a number distribution of an aspect ratio of the resin powder: A50?1?X?A50+1 Inequality 1, where A50 represents a median of the aspect ratio.
    Type: Application
    Filed: September 6, 2019
    Publication date: March 12, 2020
    Inventors: Hitoshi IWATSUKI, Sohichiroh IIDA, Yunsheng SUN, Satoshi OGAWA
  • FIBER AGGREGATION, SHORT FIBER AND METHOD OF MANUFACTURING THE SAME, AND FILM AND METHOD OF MANUFACTURING THE SAME
    Publication number: 20200070468
    Abstract: A fiber aggregation contains fiber containing a thermoplastic resin, each of the fiber being mutually joined and aligned.
    Type: Application
    Filed: September 3, 2019
    Publication date: March 5, 2020
    Inventors: Sohichiroh IIDA, Hitoshi IWATSUKI, Mitsuru NARUSE, Satoshi OGAWA, Yunsheng SUN
  • RESIN POWDER, DEVICE FOR SOLID FREEFORM FABRICATION OBJECT, AND METHOD OF MANUFACTURING SOLID FREEFORM FABRICATION OBJECT
    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
  • RESIN POWDER FOR PRODUCING THREE-DIMENSIONAL OBJECT, THREE-DIMENSIONAL OBJECT PRODUCING METHOD, AND THREE-DIMENSIONAL OBJECT PRODUCING APPARATUS
    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
  • POWDER FOR SOLID FREEFORM FABRICATION, DEVICE FOR MANUFACTURING SOLID FREEFORM FABRICATION OBJECT, METHOD OF MANUFACTURING SOLID FREEFORM FABRICATION OBJECT, AND RESIN POWDER
    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