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Ink-jet recording system using electrostatic force to expel ink

  • US 6,158,844 A
  • Filed: 09/15/1997
  • Issued: 12/12/2000
  • Est. Priority Date: 09/13/1996
  • Status: Expired due to Fees
First Claim
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1. An ink jet recording device for applying a static electric force in an ink to cause an ink particle to fly onto a recording medium for recording, the ink jet recording device comprising:

  • a control electrode substrate including an insulating substrate arranged to face the recording medium, a through hole which is passed through said insulating substrate for ejecting and flying said ink particle toward said recording medium, and a control electrode provided near said through hole to apply the static electric force to the ink;

    ink supply means for supplying ink into said through hole of said control electrode substrate;

    voltage applying means for applying a voltage to said control electrode;

    an ink guide, which is arranged substantially at a center of said through hole of said insulating substrate and said control electrode and which has a tip portion serving as an ink-droplet flying position, said tip portion projecting from an upper surface of said control electrode or said insulating substrate toward said recording medium;

    whereinsaid ink guide comprises a flat base portion facing said control electrode substrate and a plurality of projecting portions, each of which projects in an ink flying direction from said base portion at a position facing a corresponding through hole for allowing the ink to fly out of the tip of the projecting portion;

    whereinsaid projecting portion of said ink guide projects in an ink flying direction from the through hole of said insulating substrate and said control electrode, and said projecting portion has a tip portion having inclined planes toward both sides;

    whereinsaid projecting portion of said ink guide has a flat plane which is arranged to join said included planes to one another.

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