Patents by Inventor Osamubo Otubo

Osamubo Otubo 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).

  • Ink jet recording apparatus with an improved ink sensor
    Patent number: 4121223
    Abstract: Ink jet recording apparatus has an ink sensor which detects charges on charged ink droplets emitted from a nozzle of the ink jet recording apparatus and emits electric signals for controlling the above apparatus. The ink sensor comprises a pair of induction plates disposed with a separation distance, and a pair of grounded plates each of which is mounted on each of the induction plates through an electric insulator. The sensor is disposed such that flying paths of the ink particles to be detected are between the pair of induction plates. In the induction plates, current is induced at every time when each of the charged ink droplets pass between the pair of induction plates thereby providing electric signals for controlling.
    Type: Grant
    Filed: September 10, 1976
    Date of Patent: October 17, 1978
    Assignee: Hitachi, Ltd.
    Inventors: Hideyuki Omori, Osamubo Otubo, Yoshio Ohuchi