Patents by Inventor Sakiko Tanabe

Sakiko Tanabe 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 head having plural terminals electrically connected in common during storage
    Patent number: 5670998
    Abstract: A method for preserving an ink jet head and an ink jet head unit which can prevent worsening of the ink discharging features when the ink jet head is preserved or stored before it is assembled to an ink jet recording apparatus. The preserving method and the ink jet head unit are characterized in that terminals connected respectively to a plurality of energy generating means for generating energy for discharging ink are all also connected to each other by conductive means such as a clip or conductive tape.
    Type: Grant
    Filed: August 4, 1993
    Date of Patent: September 23, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Junji Shimoda, Sakiko Tanabe, Toshiaki Hirosawa
  • Ink jet recording method and apparatus utilizing temperature dependent, pre-discharge, meniscus retraction
    Patent number: 5264865
    Abstract: An ink jet recording method of applying, to a piezoelectric element serving as an energy generating member for ink droplet formation and emission, a first voltage pulse for retracting the meniscus in a direction opposite to the emitting direction prior to the ink droplet formation, and a second voltage pulse supplied in succession to the first voltage pulse for emitting an ink droplet. The first voltage pulse is controlled according to the circumferential temperature of the piezoelectric element in action.
    Type: Grant
    Filed: January 21, 1992
    Date of Patent: November 23, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Junji Shimoda, Sakiko Tanabe, Toshiaki Hirosawa
  • Liquid injection recording method for accurately producing an image regardless of ambient temperature
    Patent number: 4980699
    Abstract: In a liquid injection recording method, the falling time of a voltage pulse applied to electromechanical converting means for generating energy for discharging liquid droplets to a recording medium is made longer under a high temperature environment than under a room temperature environment.
    Type: Grant
    Filed: October 23, 1989
    Date of Patent: December 25, 1990
    Assignee: Canon Kabushiki Kaisha
    Inventors: Sakiko Tanabe, Junji Shimoda, Toshiaki Hirosawa