Patents by Inventor Gaku Ko

Gaku Ko 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).

  • Liquid ejecting head
    Patent number: 7490923
    Abstract: A conductive nozzle plate is formed with a nozzle orifice. An insulative layer is formed on a first face of the nozzle plate. A head body includes a pressure chamber adapted to contain liquid therein and a pressure generating element operable to cause pressure fluctuation in the liquid. The head body is attached to a second face of the nozzle plate so as to communicate the pressure chamber with the nozzle orifice. The second face of the nozzle plate and the head body are fixed to a head case. A conductive head cover covers a part of the first face of the nozzle plate while exposing the nozzle orifice. A part of the nozzle plate and the head cover directly come into contact with each other.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: February 17, 2009
    Assignee: Seiko Epson Corporation
    Inventors: Hirokazu Shibuya, Yasunori Koike, Noriaki Okazawa, Katsuhiro Okubo, Gaku Ko, Tatsuo Akatsu, Takateru Yamashita
  • LIQUID EJECTING HEAD
    Publication number: 20080235947
    Abstract: A conductive nozzle plate is formed with a nozzle orifice. An insulative layer is formed on a first face of the nozzle plate. A head body includes a pressure chamber adapted to contain liquid therein and a pressure generating element operable to cause pressure fluctuation in the liquid. The head body is attached to a second face of the nozzle plate so as to communicate the pressure chamber with the nozzle orifice. The second face of the nozzle plate and the head body are fixed to a head case. A conductive head cover covers a part of the first face of the nozzle plate while exposing the nozzle orifice. A part of the nozzle plate and the head cover directly come into contact with each other.
    Type: Application
    Filed: May 8, 2008
    Publication date: October 2, 2008
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Hirokazu SHIBUYA, Yasunori KOIKE, Noriaki OKAZAWA, Katsuhiro OKUBO, Gaku KO, Tatsuo AKATSU, Takateru YAMASHITA
  • Liquid ejecting head
    Publication number: 20060164467
    Abstract: A conductive nozzle plate is formed with a nozzle orifice. An insulative layer is formed on a first face of the nozzle plate. A head body includes a pressure chamber adapted to contain liquid therein and a pressure generating element operable to cause pressure fluctuation in the liquid. The head body is attached to a second face of the nozzle plate so as to communicate the pressure chamber with the nozzle orifice. The second face of the nozzle plate and the head body are fixed to a head case. A conductive head cover covers a part of the first face of the nozzle plate while exposing the nozzle orifice. A part of the nozzle plate and the head cover directly come into contact with each other.
    Type: Application
    Filed: December 21, 2005
    Publication date: July 27, 2006
    Inventors: Hirokazu Shibuya, Yasunori Koike, Noriaki Okazawa, Katsuhiro Okubo, Gaku Ko, Tatsuo Akatsu, Takateru Yamashita
  • Liquid ejection apparatus and method of driving the same
    Publication number: 20050195227
    Abstract: A liquid ejection head ejects liquid droplets toward a target medium while being moved in a first direction. A temperature detector detects temperature in a peripheral region of the liquid ejection head. A signal generator generates a first signal including first pulses operable to drive the liquid ejection head so as to eject the liquid droplets toward a unit region in the target medium at a first frequency, and a second signal including second pulses operable to drive the liquid ejection head so as to eject the liquid droplets toward the unit region at a second frequency which is lower than the first frequency.
    Type: Application
    Filed: November 17, 2004
    Publication date: September 8, 2005
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Ryoichi Tanaka, Syuji Yonekubo, Gaku Ko, Hidetoshi Masuda, Tsuyoshi Tomii