Patents by Inventor Mituhide Matuda

Mituhide Matuda 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 apparatus with voltage control unit controlling a voltage source to apply AC preheating voltage and DC ink-boiling voltage
    Patent number: 5159355
    Abstract: An ink jet apparatus includes a pair of electrodes disposed on an inner wall of an ink reservoir that is provided with a nozzle. An AC voltage is applied to the electrodes to preheat the conductive ink and prevent electrolysis of the conductive ink. A DC voltage is applied to the electrodes after the ink has been preheated to evaporate the conductive ink so that the increase in ink volume jets the conductive ink from the nozzle. The AC voltage is applied within a frequency range especially effective to suppress electrolysis of the conductive ink.
    Type: Grant
    Filed: December 7, 1990
    Date of Patent: October 27, 1992
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hideaki Horio, Hiroaki Sakai, Masaharu Oyama, Mituhide Matuda