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Electrostatic ink-jet printer

  • US 6,302,529 B1
  • Filed: 04/15/1999
  • Issued: 10/16/2001
  • Est. Priority Date: 04/16/1998
  • Status: Expired due to Fees
First Claim
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1. An electrostatic ink-jet printer comprising:

  • a plurality of jutting eject points made of dielectric material orderly disposed in a plane;

    a liquid toner containing electrified colored particles for drenching surfaces of the plurality of jutting eject points;

    a bias electrode for generating a coulomb force by being applied with a voltage having an identical electric polarity with that of the electrified colored particles so as to agglomerate the electrified colored particles to tops of the plurality of jutting eject points; and

    a plurality of ultrasonic wave generating sections provided at positions corresponding to bases of the plurality of jutting eject points, the plurality of ultrasonic wave generating sections generating ultrasonic waves toward the tops of the plurality of jutting eject points so as to separate liquid droplets containing the agglomerated electrified colored particles from the tops thereof, wherein a sectional shape of a top of each of the plurality of jutting eject points is made to be a right angle and a distance between a base of the jutting eject point and the respective plurality of ultrasonic wave generating sections is made to be an integral multiple of a half wavelength of the ultrasonic wave.

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