Patents by Inventor Keiko Osaka

Keiko Osaka 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: 11667055
    Abstract: A method for producing particles, the method including: depolymerizing a resin to obtain a depolymerized product; contacting the depolymerized product obtained in the depolymerizing with a first compressive fluid to obtain a melted product; and jetting the melted product obtained in the contacting to granulate the particles.
    Type: Grant
    Filed: February 13, 2019
    Date of Patent: June 6, 2023
    Assignee: RICOH COMPANY, LTD.
    Inventors: Keiko Osaka, Chiaki Tanaka
  • 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
  • Publication number: 20210138688
    Abstract: A method for producing particles, the method including: depolymerizing a resin to obtain a depolymerized product; contacting the depolymerized product obtained in the depolymerizing with a first compressive fluid to obtain a melted product; and jetting the melted product obtained in the contacting to granulate the particles.
    Type: Application
    Filed: February 13, 2019
    Publication date: May 13, 2021
    Inventors: Keiko OSAKA, Chiaki TANAKA
  • Publication number: 20210039311
    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: Application
    Filed: October 22, 2020
    Publication date: February 11, 2021
    Inventors: Teruki KUSAHARA, Masaki WATANABE, Keiko OSAKA, Mitsuru NARUSE, Mariko KOJIMA, Yasuyuki YAMASHITA, Yoshihiro NORIKANE
  • 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: 10767071
    Abstract: Provided is a liquid material for forming a three-dimensional object used for forming a three-dimensional object made of a powder material for forming a three-dimensional object containing an organic material and a base material, wherein the liquid material contains a cross-linking agent cross-linkable with the organic material and a water-soluble resin having a weight average molecular weight of greater than or equal to 50,000.
    Type: Grant
    Filed: February 11, 2016
    Date of Patent: September 8, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Keiko Osaka, Takeo Yamaguchi
  • 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: 9994702
    Abstract: Provided is a liquid material for forming a three-dimensional object, the liquid material adapted to be delivered to a powder material for forming a three-dimensional object to harden the powder material, the powder material containing an organic material and a base material, the liquid material including a cross-linking agent cross-linkable with the organic material and a resin having a glass transition temperature of 50° C. or higher or a melting point of 50° C. or higher.
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: June 12, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Keiko Osaka, Mariko Kojima, Yoshihiro Norikane, Hiroshi Iwata
  • Patent number: 9669565
    Abstract: A method for producing particles, which contains: bringing a compressive fluid and a pressure plastic material into contact with each other to melt the pressure plastic material; and jetting a melt obtained by melting the pressure plastic material to form particles, wherein the jetting the melt is performed by a two-fluid nozzle or three-fluid nozzle.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: June 6, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Keiko Osaka, Chiaki Tanaka
  • Patent number: 9611376
    Abstract: To provide a method for producing particles, which contains: bringing a compressive fluid and a pressure plastic material into contact with each other using a multistage split flow micromixer, to thereby produce a melt of the pressure plastic material, in which the compressive fluid is dissolved; and jetting the melt of the pressure plastic material, to form particles, wherein the pressure plastic material is a resin having a carbonyl structure —C(?O)—, and wherein a viscosity of the melt is 500 mPa·s or lower, as measured under temperature and pressure conditions at the time of the jetting the melt of the pressure plastic material.
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: April 4, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Keiko Osaka, Chiaki Tanaka, Akira Suzuki, Shinichiro Kawasaki
  • Patent number: 9469723
    Abstract: A particle manufacturing method of the present invention includes: ring-opening-polymerizing a ring-opening-polymerizable monomer after bringing the ring-opening-polymerizable monomer into contact with a first compressible fluid; and granulating a polymer obtained in the ring-opening-polymerizing by jetting the polymer and the first compressible fluid.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: October 18, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Keiko Osaka, Chiaki Tanaka, Taichi Nemoto
  • Publication number: 20160272844
    Abstract: Provided is a liquid material for forming a three-dimensional object used for forming a three-dimensional object made of a powder material for forming a three-dimensional object containing an organic material and a base material, wherein the liquid material contains a cross-linking agent cross-linkable with the organic material and a water-soluble resin having a weight average molecular weight of greater than or equal to 50,000.
    Type: Application
    Filed: February 11, 2016
    Publication date: September 22, 2016
    Inventors: Keiko OSAKA, Takeo Yamaguchi
  • Publication number: 20160271695
    Abstract: Provided is a liquid material for forming a three-dimensional object used for forming a three-dimensional object made of a powder material for forming a three-dimensional object containing an organic material and a base material, wherein the liquid material contains a solvent and a cross-linking agent cross-linkable with the organic material, and wherein a rate of viscosity change of the liquid material between before and after the liquid material is left to stand still at 50° C. for three days is lower than 20%.
    Type: Application
    Filed: February 9, 2016
    Publication date: September 22, 2016
    Inventors: Keiko OSAKA, Takeo YAMAGUCHI
  • Publication number: 20160236412
    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: Application
    Filed: September 29, 2014
    Publication date: August 18, 2016
    Inventors: Teruki KUSAHARA, Masaki WATANABE, Keiko OSAKA, Mitsuru NARUSE, Mariko KOJIMA, Yasuyuki YAMASHITA, Yoshihiro NORIKANE
  • Publication number: 20160200908
    Abstract: Provided is a liquid material for forming a three-dimensional object, the liquid material adapted to be delivered to a powder material for forming a three-dimensional object to harden the powder material, the powder material containing an organic material and a base material, the liquid material including a cross-linking agent cross-linkable with the organic material and a resin having a glass transition temperature of 50° C. or higher or a melting point of 50° C. or higher.
    Type: Application
    Filed: December 14, 2015
    Publication date: July 14, 2016
    Inventors: Keiko OSAKA, Mariko KOJIMA, Yoshihiro NORIKANE, Hiroshi IWATA
  • Publication number: 20160160021
    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: Application
    Filed: November 11, 2015
    Publication date: June 9, 2016
    Inventors: Mariko KOJIMA, Yoshihiro NORIKANE, Keiko OSAKA, Hiroshi IWATA, Mitsuru NARUSE, Nozomu TAMOTO
  • Publication number: 20150267039
    Abstract: To provide a method for producing particles, which contains: bringing a compressive fluid and a pressure plastic material into contact with each other using a multistage split flow micromixer, to thereby produce a melt of the pressure plastic material, in which the compressive fluid is dissolved; and jetting the melt of the pressure plastic material, to form particles, wherein the pressure plastic material is a resin having a carbonyl structure —C(?O)—, and wherein a viscosity of the melt is 500 mPa·s or lower, as measured under temperature and pressure conditions at the time of the jetting the melt of the pressure plastic material.
    Type: Application
    Filed: November 1, 2013
    Publication date: September 24, 2015
    Inventors: Keiko Osaka, Chiaki Tanaka, Akira Suzuki, Shinichiro Kawasaki
  • Publication number: 20150252141
    Abstract: A particle manufacturing method of the present invention includes: ring-opening-polymerizing a ring-opening-polymerizable monomer after bringing the ring-opening-polymerizable monomer into contact with a first compressible fluid; and granulating a polymer obtained in the ring-opening-polymerizing by jetting the polymer and the first compressible fluid.
    Type: Application
    Filed: September 27, 2013
    Publication date: September 10, 2015
    Inventors: Keiko OSAKA, Chiaki TANAKA, Taichi NEMOTO
  • Publication number: 20150132696
    Abstract: A toner, including: a binder resin; and a releasing agent, wherein the toner includes a pressure plastic material as the binder resin, wherein the releasing agent includes a plurality of particulate releasing agents, and wherein the particulate releasing agents forming domain phases are dispersed in the pressure plastic material forming a continuous phase.
    Type: Application
    Filed: April 30, 2013
    Publication date: May 14, 2015
    Inventors: Keiko Osaka, Chiaki Tanaka, Masaki Watanabe
  • Publication number: 20150119484
    Abstract: A method for producing particles, which contains: bringing a compressive fluid and a pressure plastic material into contact with each other to melt the pressure plastic material; and jetting a melt obtained by melting the pressure plastic material to form particles, wherein the jetting the melt is performed by a two-fluid nozzle or three-fluid nozzle.
    Type: Application
    Filed: April 30, 2013
    Publication date: April 30, 2015
    Inventors: Keiko Osaka, Chiaki Tanaka