Patents by Inventor Eisuke Sugisawa

Eisuke Sugisawa 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).

  • Classifier and method for preparing toner
    Patent number: 6568536
    Abstract: A classifier is proposed which includes a dispersion chamber for dispersing a powder material therein, a classification chamber connected to the dispersion chamber, and a conical member disposed between the dispersion chamber and the classification chamber, wherein the dispersion chamber includes a particle residence prevention member for preventing the powder material from residing within the dispersion chamber by changing the speed of the cyclonic flow of the powder material in the dispersion chamber so as to be decreased in the direction of the feed inlet within the dispersion chamber, and a method of preparing toner by use of the classifier is also proposed.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: May 27, 2003
    Assignee: Ricoh Company, Ltd.
    Inventors: Tetsuya Tanaka, Yoshihiro Saitoh, Eisuke Sugisawa, Kazuyoshi Morii
  • Classifier and method for preparing toner
    Publication number: 20020021987
    Abstract: A classifier is proposed which includes a dispersion chamber for dispersing a powder material therein, a classification chamber connected to the dispersion chamber, and a conical member disposed between the dispersion chamber and the classification chamber, wherein the dispersion chamber includes a particle residence prevention member for preventing the powder material from residing within the dispersion chamber by charging the speed of the cyclonic flow of the powder material in the dispersion chamber so as to be decreased in the direction of the feed inlet within the dispersion chamber, and a method of preparing toner by use of the classifier is also proposed.
    Type: Application
    Filed: February 26, 2001
    Publication date: February 21, 2002
    Inventors: Tetsuya Tanaka, Yoshihiro Saitoh, Eisuke Sugisawa, Kazuyoshi Morii
  • Classifying device
    Patent number: 5938045
    Abstract: A classifying device including an upper, dispersing chamber for dispersing solid particles supplied thereto together with a carrier gas, and a lower, classifying chamber directly connected to a lower end of the dispersing chamber for centrifugally classifying the solid particles, supplied from the dispersing chamber to the classifying chamber, into relatively fine particles and relatively coarse particles. The dispersing chamber is provided with a rotor for swirling the solid particles in the dispersing chamber.
    Type: Grant
    Filed: January 13, 1997
    Date of Patent: August 17, 1999
    Assignee: Ricoh Company, Ltd.
    Inventors: Nobuyasu Makino, Kenichi Uehara, Keiko Watanabe, Satoshi Okano, Kazuyuki Matsui, Eisuke Sugisawa