Patents by Inventor Katsumi Sudo

Katsumi Sudo 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).

  • Device for detecting abnormal temperature in fixer
    Patent number: 4104692
    Abstract: A device for detecting an abnormal temperature in a fixer, including a pulse generation controller capable of detecting the temperature in the fixer, comparing it with a predetermined reference temperature, and generating pulses continuously while the fixer temperature is lower than the reference temperature or generating no pulse at any other time; a pulse interrupter for interrupting the pulse output from the pulse generation controller until the temperature in the fixer reaches a desired fixing temperature for the first time after the start of power supply to the fixer, and an abnormality detector for detecting an abnormal fixing temperature when the integral of the pulses having passed through the pulse interrupter within a given time has reached a predetermined value.
    Type: Grant
    Filed: January 3, 1977
    Date of Patent: August 1, 1978
    Assignee: Rank Xerox, Ltd.
    Inventors: Katsumi Sudo, Yukio Kanazawa