Patents by Inventor Kifuku Takagi

Kifuku Takagi 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).

  • Toner, method for manufacturing the toner, method and device for packing the toner, and image forming apparatus using the toner
    Patent number: 7223510
    Abstract: A method for producing a toner including dissolving or dispersing a toner constituent mixture including a binder resin and a colorant in an organic solvent to prepare a toner constituent mixture liquid; dispersing the toner constituent mixture liquid in an aqueous medium including a particulate dispersant to prepare an emulsion; and removing the organic solvent from the emulsion while applying a shearing force to the emulsion. A toner manufactured by the method and having a spindle form while satisfying specific particle diameter relationships. An image forming apparatus using the toner. A toner packing method and device in which the toner is fluidized and pressurized to be fed from a fluidizing container to a toner container on which a gas-powder separation sieve is set to discharge air therefrom.
    Type: Grant
    Filed: May 21, 2004
    Date of Patent: May 29, 2007
    Assignee: Ricoh Company Limited
    Inventors: Kazuyuki Matsui, Noboru Kuroda, Kifuku Takagi, Masato Kobayashi
  • Toner, method for manufacturing the toner, method and device for packing the toner, and image forming apparatus using the toner
    Publication number: 20040234882
    Abstract: A method for producing a toner including dissolving or dispersing a toner constituent mixture including a binder resin and a colorant in an organic solvent to prepare a toner constituent mixture liquid; dispersing the toner constituent mixture liquid in an aqueous medium including a particulate dispersant to prepare an emulsion; and removing the organic solvent from the emulsion while applying a shearing force to the emulsion. A toner manufactured by the method and having a spindle form while satisfying specific particle diameter relationships. An image forming apparatus using the toner. A toner packing method and device in which the toner is fluidized and pressurized to be fed from a fluidizing container to a toner container on which a gas-powder separation sieve is set to discharge air therefrom.
    Type: Application
    Filed: May 21, 2004
    Publication date: November 25, 2004
    Inventors: Kazuyuki Matsui, Noboru Kuroda, Kifuku Takagi, Masato Kobayashi