Patents by Inventor Yoshikuni Touyama

Yoshikuni Touyama 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).

  • Dry developing mechanism
    Patent number: 4004714
    Abstract: A dry developing apparatus equipped with a developer amount detector, includes a container in which the developer is contained, a rotational member for agitating or carrying the developer, a support for supporting the rotational member in such a way that the rotational member, when rotated, is displaceable axially under the force of the load resistance produced by the presence of the developer, a holder for holding the rotational member so as to cause the member to return in the direction opposite to the direction of the displacement when the lead resistance is lessened with decrease of the developer, and a detector for detecting the difference in the amount of the axial displacement of the rotational member.
    Type: Grant
    Filed: February 13, 1975
    Date of Patent: January 25, 1977
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshio Ito, Tadayuki Kitajima, Yoshikuni Touyama