Patents by Inventor Takao Yamanouchi

Takao Yamanouchi 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).

  • Electrostatic latent image developing toner and production method thereof
    Publication number: 20030113647
    Abstract: A toner for forming an electrophotographic image is disclosed. The toner particle contains at least two inorganic salts including an inorganic salt comprising a positive ion having a first valence and an inorganic salt comprising a positive ion having a second valence different from the first valence, a total amount of the inorganic salt having the first valence is greatest among the inorganic salts in the toner particle, and a total amount of the inorganic salt having the second valence is second greatest among the inorganic salts in the toner particle.
    Type: Application
    Filed: August 20, 2002
    Publication date: June 19, 2003
    Inventors: Asao Matsushima, Ken Ohmura, Takao Yamanouchi, Naohiro Hirose, Tomoe Kitani, Yoshiki Nishimori
  • Production method of toner
    Publication number: 20020039699
    Abstract: A method of preparing toner for developing an electrostatic image is disclosed. The method comprises process for adhering by fusing resin particles onto surface of colored particles (core particles) containing a resin particle and a colorant by salting-out/fusion-adhering to form the resin layer (shell).
    Type: Application
    Filed: July 24, 2001
    Publication date: April 4, 2002
    Inventors: Yoshiki Nishimori, Takao Yamanouchi, Shigenori Kohno, Meizo Shirose, Hiroyuki Yamada
  • Toner for developing electrostatic image and image forming method
    Patent number: 6296980
    Abstract: Disclosed is a toner for developing electrostatic image, comprising a resin and colorant. The toner has a variation coefficient of shape coefficient of not more than 16 percent and a number variation coefficient in the number particle size distribution of not more than 27 percent. An image forming method employing the toner is also disclosed.
    Type: Grant
    Filed: November 15, 1999
    Date of Patent: October 2, 2001
    Assignee: Konica Corporation
    Inventors: Tomomi Oshiba, Ken Ohmura, Takao Yamanouchi, Asao Matsushima, Shigenori Kouno