Patents by Inventor Yoshinobu Kohno

Yoshinobu Kohno 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).

  • Image forming apparatus with transfer voltage controlled according to temperature and humidity
    Patent number: 6192203
    Abstract: An image forming apparatus has a voltage information storing unit in which data of transfer voltages in correspondence to predetermined discontinuous temperatures and humidity are stored. In the case that measured temperature and humidity of an atmosphere out of the apparatus do not coincide with discontinuous temperature and humidity stored in the voltage information storing unit, a proper transfer voltage is applied to a medium transfer roller by interpolating data of the stored transfer voltage so as to calculate the transfer voltage and applying the transfer voltage to the medium transfer roller.
    Type: Grant
    Filed: November 10, 1999
    Date of Patent: February 20, 2001
    Assignee: Matsushita Electric Industrial, Co., Ltd.
    Inventors: Yukio Nishio, Yoshiyuki Okamura, Yoshinobu Kohno