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High frequency printing mechanism

  • US 5,164,740 A
  • Filed: 04/24/1991
  • Issued: 11/17/1992
  • Est. Priority Date: 04/24/1991
  • Status: Expired due to Term
First Claim
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1. A device for producing ink droplets on demand and ejecting such droplets toward a print medium, said device comprising:

  • a cantilevered beam having a base end and a free end, the free end having a lower moment of inertia than the base end, said free end having an aperture therein;

    a mechanical oscillator attached to the base end of said beam for imparting oscillating motion thereto at a selected frequency and selected amplitude; and

    an ink supply in fluid communication with the free end of said beam, said ink being ejected through said aperture in said free end toward said print medium upon said oscillating motion exceeding a predetermined threshold amplitude.

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