Patents by Inventor Masataka Hirota

Masataka Hirota 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).

  • Keyless printing press
    Patent number: 5097762
    Abstract: The known keyless printing press including an ink feeder section consisting of an ink source roller, a transfer roller, a doctor roller, an anti-hysteresis doctor disposed on the circumferential surface of the doctor roller and the like, and also provided with a wetting device for a plate drum, is improved in order to realize a fresh condition of the ink source roller which is free from residual ink before printing ink having a uniform moisture content is applied thereto. The improvements reside in that a refresh doctor is disposed on the ink source roller at a position downstream of the nip between the ink source roller and the transfer roller for scraping residual ink from the circumferential surface of the ink source roller.
    Type: Grant
    Filed: August 23, 1989
    Date of Patent: March 24, 1992
    Assignees: Mitsubishi Jukogyo Kabushiki Kaisha, Ryomei Engineering Co., Ltd.
    Inventors: Takafumi Nakano, Akikazu Seo, Hiromitsu Soeda, Masataka Hirota