Patents by Inventor Kiyotada Katoh

Kiyotada Katoh 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: 11371783
    Abstract: A disclosed loop heat pipe includes an evaporator configured to absorb heat from outside by a wall to evaporate a working fluid from a liquid phase to a gas phase; a condenser configured to condense a gas phase working fluid introduced from the evaporator into a liquid phase; an elastic wick configured to contact an inner wall of the evaporator by an elastic force from the elastic wick; and a wick deformation member configured to deform the elastic wick increase a contact pressure of the elastic wick against the inner wall of the evaporator.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: June 28, 2022
    Assignee: RICOH COMPANY, LTD.
    Inventors: Tomoyasu Hirasawa, Kiyotada Katoh, Takeshi Endoh, Takashi Tanaka, Toshihiko Baba, Keisuke Ikeda, Hiroki Yamasaki
  • Patent number: 11187468
    Abstract: A loop heat pipe wick includes porous rubber.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: November 30, 2021
    Assignee: RICOH COMPANY, LTD.
    Inventors: Kiyotada Katoh, Tomoyasu Hirasawa, Norihiko Aze, Takeshi Endoh
  • Publication number: 20190390918
    Abstract: A disclosed loop heat pipe includes an evaporator configured to absorb heat from outside by a wall to evaporate a working fluid from a liquid phase gas phase; a condenser configured to condense a gas phase working fluid introduced from the evaporator into a liquid phase; an elastic wick configured to contact an inner wall of the evaporator by an elastic force from the elastic wick; and a wick deformation member configured to deform the elastic wick increase a contact pressure of the elastic wick against the inner wall of the evaporator.
    Type: Application
    Filed: June 18, 2019
    Publication date: December 26, 2019
    Inventors: Tomoyasu Hirasawa, Kiyotada Katoh, Takeshi Endoh, Takashi Tanaka, Toshihiko Baba, Keisuke Ikeda, Hiroki Yamasaki
  • Patent number: 10268131
    Abstract: A cleaner, such as provided in a particulate material production apparatus, for cleaning a droplet ejector, which includes nozzles to eject a particulate material composition liquid as droplets, and a nozzle plate bearing the nozzles. A substantially closed cleaning space is formed outside the nozzles and the nozzle plate, and a first cleaning liquid supplying device supplies a first cleaning liquid to the cleaning space so that the nozzles and the nozzle plate are contacted with the first cleaning liquid. In addition, a vibrator vibrates the first cleaning liquid when the nozzles and the nozzle plate are contacted with the first cleaning liquid to clean the nozzles and the nozzle plate.
    Type: Grant
    Filed: November 7, 2016
    Date of Patent: April 23, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yasutada Shitara, Minoru Masuda, Shinji Aoki, Yoshihiro Norikane, Andrew Mwaniki Mulwa, Masaru Ohgaki, Kiyotada Katoh, Satoshi Takahashi
  • Publication number: 20180180360
    Abstract: A loop heat pipe wick includes porous rubber.
    Type: Application
    Filed: December 18, 2017
    Publication date: June 28, 2018
    Inventors: Kiyotada Katoh, Tomoyasu Hirasawa, Norihiko Aze, Takeshi Endoh
  • Publication number: 20170050204
    Abstract: A cleaning method for cleaning a droplet ejector, which includes nozzles to eject a particulate material composition liquid, and a nozzle plate bearing the nozzles is provided. The cleaning method includes forming a substantially closed cleaning space outside the nozzles and the nozzle plate; supplying a cleaning liquid to the cleaning space so that the nozzles and the nozzle plate are contacted with the cleaning liquid; and vibrating the cleaning liquid when the nozzles and the nozzle plate are contacted with the cleaning liquid to clean the nozzles and the nozzle plate.
    Type: Application
    Filed: November 7, 2016
    Publication date: February 23, 2017
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yasutada SHITARA, Minoru MASUDA, Shinji AOKI, Yoshihiro NORIKANE, Andrew Mwaniki MULWA, Masaru OHGAKI, Kiyotada KATOH, Satoshi TAKAHASHI
  • Patent number: 9539600
    Abstract: A cleaning method for cleaning a droplet ejector, which includes nozzles to eject a particulate material composition liquid, and a nozzle plate bearing the nozzles is provided. The cleaning method includes forming a substantially closed cleaning space outside the nozzles and the nozzle plate; supplying a cleaning liquid to the cleaning space so that the nozzles and the nozzle plate are contacted with the cleaning liquid; and vibrating the cleaning liquid when the nozzles and the nozzle plate are contacted with the cleaning liquid to clean the nozzles and the nozzle plate.
    Type: Grant
    Filed: September 18, 2013
    Date of Patent: January 10, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yasutada Shitara, Minoru Masuda, Shinji Aoki, Yoshihiro Norikane, Andrew Mwaniki Mulwa, Masaru Ohgaki, Kiyotada Katoh, Satoshi Takahashi
  • Patent number: 9195156
    Abstract: A particulate material production method is provided. The particulate material production method includes ejecting a particulate material composition liquid, which includes an organic solvent and a particulate material composition including at least a resin and dissolved or dispersed in the organic solvent, from at least one nozzle to form droplets of the particulate material composition liquid in a gas phase; and solidifying the droplets of the particulate material composition liquid to prepare particles of the particulate material composition. The droplet solidifying step includes contacting the droplets with a poor solvent for the particulate material composition.
    Type: Grant
    Filed: December 30, 2013
    Date of Patent: November 24, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Ryota Inoue, Yoshihiro Moriya, Hiroshi Yamada, Tatsuru Moritani, Minoru Masuda, Akinori Saito, Yasutada Shitara, Kiyotada Katoh, Satoshi Takahashi
  • Patent number: 9170508
    Abstract: The particulate material production method includes vibrating a particulate material composition liquid in a liquid column resonance chamber having at least one nozzle to form a standing wave in the particulate material composition liquid caused by liquid column resonance, so that droplets of the particulate material composition liquid are ejected in a droplet ejection direction from the nozzle so as to fly in a space in a flight direction; feeding a gas in a direction substantially perpendicular to the droplet ejection direction to change the flight direction of the ejected droplets; and solidifying the droplets in the space to produce a particulate material. The particulate material composition liquid includes at least a solvent and a component of the particulate material dissolved or dispersed in the solvent, and the nozzle is located at a location corresponding to an anitnode of the standing wave.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: October 27, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Kiyotada Katoh, Yasutada Shitara, Minoru Masuda, Yoshihiro Norikane, Kenta Kenjoh, Satoshi Takahashi
  • Patent number: 9141010
    Abstract: A particulate material production apparatus is disclosed. The particulate material production apparatus includes a droplet ejector to eject droplets of a particulate material composition liquid or a melted particulate material composition in a droplet ejection direction from nozzles; a solidifying device to solidify the droplets; a first airflow forming device to form a first airflow to feed the ejected droplets to the solidifying device with the first airflow; and a second airflow forming device to form a second airflow to apply the second airflow the droplets before the droplets are fed by the first airflow. The second airflow forming device forms the second airflow by supplying a pressed gas from a slit, and the traveling direction of the first airflow is substantially perpendicular to the droplet ejection direction.
    Type: Grant
    Filed: June 13, 2013
    Date of Patent: September 22, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Kiyotada Katoh, Yoshihiro Norikane, Yasutada Shitara, Shinji Aoki, Minoru Masuda, Satoshi Takahashi
  • Patent number: 9056296
    Abstract: An apparatus for manufacturing fine particles is provided. The apparatus includes a liquid droplet discharge device and a liquid droplet solidification device. The liquid droplet discharge device has multiple nozzles. The liquid droplet discharge device is adapted to discharge a liquid from the multiple nozzles to form the liquid into liquid droplets. The liquid comprises a solvent in which constituents of the fine particles are dissolved or dispersed or a melt of constituents of the fine particles. The liquid droplet solidification device is adapted to solidify the liquid droplets by an airflow. The multiple nozzles are arranged in a manner such that each of the nozzles does not overlap each other relative to a direction of the airflow.
    Type: Grant
    Filed: April 1, 2013
    Date of Patent: June 16, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Satoshi Takahashi, Yoshihiro Norikane, Yasutada Shitara, Kiyotada Katoh, Minoru Masuda
  • Patent number: 8828285
    Abstract: A particulate production apparatus, including a droplet discharger to discharge a liquid including a particulate element which is solidified to become a particulate; and a pressure controller to feed the liquid including a particulate element to the droplet discharger at a pressure within a desired range.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: September 9, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Kiyotada Katoh, Minoru Masuda, Yasutada Shitara, Yoshihiro Norikane, Satoshi Takahashi
  • Publication number: 20140242514
    Abstract: A particulate material production method is provided. The particulate material production method includes ejecting a particulate material composition liquid, which includes an organic solvent and a particulate material composition including at least a resin and dissolved or dispersed in the organic solvent, from at least one nozzle to form droplets of the particulate material composition liquid in a gas phase; and solidifying the droplets of the particulate material composition liquid to prepare particles of the particulate material composition. The droplet solidifying step includes contacting the droplets with a poor solvent for the particulate material composition.
    Type: Application
    Filed: December 30, 2013
    Publication date: August 28, 2014
    Inventors: Ryota Inoue, Yoshihiro Moriya, Hiroshi Yamada, Tatsuru Moritani, Minoru Masuda, Akinori Saito, Yasutada Shitara, Kiyotada Katoh, Satoshi Takahashi
  • Patent number: 8765349
    Abstract: A method of manufacturing toner is provided. In the method, toner constituents are dissolved or dispersed in an organic solvent to prepare a toner constituents liquid. The toner constituents liquid is degassed so that the toner constituents liquid includes dissolved oxygen in an amount of 3 mg/L or less. The toner constituents liquid is vibrated in a chamber having at least one nozzle to form a liquid column resonance standing wave in the toner constituents liquid. The toner constituents liquid is discharged from the nozzle disposed within an area including an antinode of the liquid column resonance standing wave to form the toner constituents liquid into liquid droplets. The liquid droplets are dried to solidify the liquid droplets into solid particles.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: July 1, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshihiro Norikane, Andrew Mwaniki Mulwa, Kiyotada Katoh, Yasutada Shitara
  • Publication number: 20140141110
    Abstract: The particulate material production method includes vibrating a particulate material composition liquid in a liquid column resonance chamber having at least one nozzle to form a standing wave in the particulate material composition liquid caused by liquid column resonance, so that droplets of the particulate material composition liquid are ejected in a droplet ejection direction from the nozzle so as to fly in a space in a flight direction; feeding a gas in a direction substantially perpendicular to the droplet ejection direction to change the flight direction of the ejected droplets; and solidifying the droplets in the space to produce a particulate material. The particulate material composition liquid includes at least a solvent and a component of the particulate material dissolved or dispersed in the solvent, and the nozzle is located at a location corresponding to an anitnode of the standing wave.
    Type: Application
    Filed: January 28, 2014
    Publication date: May 22, 2014
    Inventors: Kiyotada KATOH, Yasutada SHITARA, Minoru Masuda, Yoshihiro NORIKANE, Kenta KENJOH, Satoshi TAKAHASHI
  • Publication number: 20140097267
    Abstract: A cleaning method for cleaning a droplet ejector, which includes nozzles to eject a particulate material composition liquid, and a nozzle plate bearing the nozzles is provided. The cleaning method includes forming a substantially closed cleaning space outside the nozzles and the nozzle plate; supplying a cleaning liquid to the cleaning space so that the nozzles and the nozzle plate are contacted with the cleaning liquid; and vibrating the cleaning liquid when the nozzles and the nozzle plate are contacted with the cleaning liquid to clean the nozzles and the nozzle plate.
    Type: Application
    Filed: September 18, 2013
    Publication date: April 10, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yasutada Shitara, Minoru Masuda, Shinji Aoki, Yoshihiro Norikane, Andrew Mwaniki Mulwa, Masaru Ohgaki, Kiyotada Katoh, Satoshi Takahashi
  • Patent number: 8679723
    Abstract: A method of manufacturing toner is provided. The method includes preparing a toner constituents liquid by dissolving or dispersing toner constituents in an organic solvent. The toner constituents includes a binder resin and a charge controlling agent. The charge controlling agent includes a polycondensation product of a phenol with an aldehyde. The method further includes forming a liquid column resonance standing wave in the toner constituents liquid in a chamber having at least one nozzle by vibrating the toner constituents liquid. The method further includes forming the toner constituents liquid into liquid droplets by discharging the toner constituents liquid from the nozzle. The nozzle is disposed within an area including antinodes of the liquid column resonance standing wave. The method further includes removing the organic solvent from the liquid droplets to solidify the liquid droplets.
    Type: Grant
    Filed: March 29, 2012
    Date of Patent: March 25, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Minoru Masuda, Yasutada Shitara, Yoshihiro Norikane, Kiyotada Katoh, Satoshi Takahashi
  • Patent number: 8673534
    Abstract: The particulate material production method includes vibrating a particulate material composition liquid in a liquid column resonance chamber having at least one nozzle to form a standing wave in the particulate material composition liquid caused by liquid column resonance, so that droplets of the particulate material composition liquid are ejected in a droplet ejection direction from the nozzle so as to fly in a space in a flight direction; feeding a gas in a direction substantially perpendicular to the droplet ejection direction to change the flight direction of the ejected droplets; and solidifying the droplets in the space to produce a particulate material. The particulate material composition liquid includes at least a solvent and a component of the particulate material dissolved or dispersed in the solvent, and the nozzle is located at a location corresponding to an anitnode of the standing wave.
    Type: Grant
    Filed: April 3, 2012
    Date of Patent: March 18, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Kiyotada Katoh, Yasutada Shitara, Minoru Masuda, Yoshihiro Norikane, Kenta Kenjoh, Satoshi Takahashi
  • Publication number: 20140038100
    Abstract: A particulate material production apparatus is disclosed. The particulate material production apparatus includes a droplet ejector to eject droplets of a particulate material composition liquid or a melted particulate material composition in a droplet ejection direction from nozzles; a solidifying device to solidify the droplets; a first airflow forming device to form a first airflow to feed the ejected droplets to the solidifying device with the first airflow; and a second airflow forming device to form a second airflow to apply the second airflow the droplets before the droplets are fed by the first airflow. The second airflow forming device forms the second airflow by supplying a pressed gas from a slit, and the traveling direction of the first airflow is substantially perpendicular to the droplet ejection direction.
    Type: Application
    Filed: June 13, 2013
    Publication date: February 6, 2014
    Inventors: Kiyotada KATOH, Yoshihiro NORIKANE, Yasutada SHITARA, Shinji AOKI, Minoru MASUDA, Satoshi TAKAHASHI
  • Publication number: 20130273188
    Abstract: An apparatus for manufacturing fine particles is provided. The apparatus includes a liquid droplet discharge device and a liquid droplet solidification device. The liquid droplet discharge device has multiple nozzles. The liquid droplet discharge device is adapted to discharge a liquid from the multiple nozzles to form the liquid into liquid droplets. The liquid comprises a solvent in which constituents of the fine particles are dissolved or dispersed or a melt of constituents of the fine particles. The liquid droplet solidification device is adapted to solidify the liquid droplets by an airflow. The multiple nozzles are arranged in a manner such that each of the nozzles does not overlap each other relative to a direction of the airflow.
    Type: Application
    Filed: April 1, 2013
    Publication date: October 17, 2013
    Inventors: Satoshi TAKAHASHI, Yoshihiro NORIKANE, Yasutada SHITARA, Kiyotada KATOH, Minoru MASUDA