Patents by Inventor Kenta Kenjoh

Kenta Kenjoh 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: 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
  • 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
  • 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
  • Patent number: 8568953
    Abstract: To provide an apparatus for producing a toner, including: a droplet forming unit configured to periodically discharge a toner composition liquid, which includes at least a resin and a colorant, from a plurality of nozzles so as to form droplets; a gas flow forming unit configured to form a gas flow which passes through a narrowed portion that corresponds to a nozzle formation area and that is placed on a downstream side of the nozzles with respect to a droplet discharge direction, and which advances in the droplet discharge direction; and a particle forming unit configured to form toner particles by solidifying the droplets of the toner composition liquid passed through the narrowed portion and then discharged, wherein the opening area of an opening which forms the narrowed portion decreases from an inlet side of the narrowed portion toward an outlet side of the narrowed portion.
    Type: Grant
    Filed: August 19, 2010
    Date of Patent: October 29, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Kenta Kenjoh, Tetsuya Tanaka
  • Patent number: 8444073
    Abstract: A continuous kneading apparatus including: a stationary portion having an internal space where matter is conveyed; a rotary disc member and a screw member which are configured to convey the matter in the internal space; a drive shaft member to which the rotary disc member and the screw member are fixed; and a cooling medium passage through which a cooling medium passes, wherein the cooling medium passage is provided for the screw member which is placed upstream of the rotary disc member with respect to the conveyance direction of the matter, wherein the cooling medium passing in the cooling medium passage is lower in temperature than the matter passing in the internal space, and wherein the matter passes in the internal space while provided with shear force by rotation of the drive shaft member and thus continuously kneaded, and while cooled by the cooling medium.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: May 21, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Masahiro Kawamoto, Tetsuya Tanaka, Kenta Kenjoh, Satoshi Izumi, Ippei Muneoka
  • Publication number: 20120270147
    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: April 3, 2012
    Publication date: October 25, 2012
    Inventors: Kiyotada Katoh, Yasutada Shitara, Minoru Masuda, Yoshihiro Norikane, Kenta Kenjoh, Satoshi Takahashi
  • Publication number: 20120129091
    Abstract: To provide an apparatus for producing a toner, including: a droplet forming unit configured to periodically discharge a toner composition liquid, which includes at least a resin and a colorant, from a plurality of nozzles so as to form droplets; a gas flow forming unit configured to form a gas flow which passes through a narrowed portion that corresponds to a nozzle formation area and that is placed on a downstream side of the nozzles with respect to a droplet discharge direction, and which advances in the droplet discharge direction; and a particle forming unit configured to form toner particles by solidifying the droplets of the toner composition liquid passed through the narrowed portion and then discharged, wherein the opening area of an opening which forms the narrowed portion decreases from an inlet side of the narrowed portion toward an outlet side of the narrowed portion.
    Type: Application
    Filed: August 19, 2010
    Publication date: May 24, 2012
    Inventors: Kenta Kenjoh, Tetsuya Tanaka
  • Publication number: 20110139909
    Abstract: A continuous kneading apparatus including: a stationary portion having an internal space where matter is conveyed; a rotary disc member and a screw member which are configured to convey the matter in the internal space; a drive shaft member to which the rotary disc member and the screw member are fixed; and a cooling medium passage through which a cooling medium passes, wherein the cooling medium passage is provided for the screw member which is placed upstream of the rotary disc member with respect to the conveyance direction of the matter, wherein the cooling medium passing in the cooling medium passage is lower in temperature than the matter passing in the internal space, and wherein the matter passes in the internal space while provided with shear force by rotation of the drive shaft member and thus continuously kneaded, and while cooled by the cooling medium.
    Type: Application
    Filed: December 14, 2010
    Publication date: June 16, 2011
    Inventors: Masahiro Kawamoto, Tetsuya Tanaka, Kenta Kenjoh, Satoshi Izumi, Ippei Muneoka