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Ink jet with thin nozzle wall

  • US 7,021,745 B2
  • Filed: 03/02/2001
  • Issued: 04/04/2006
  • Est. Priority Date: 07/15/1997
  • Status: Expired due to Fees
First Claim
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1. An ink jet nozzle assembly including:

  • a nozzle chamber having an inlet in fluid communication with an ink reservoir and a nozzle through which ink from the chamber can be ejected;

    the chamber including a fixed portion and a movable portion configured for relative movement in an ejection phase and alternate relative movement in a refill phase;

    the movable portion including a plurality of thermal actuator petal devices arranged around a central stem, said petal devices undergoing bending upon heating to effect periodically said relative movement; and

    the inlet being positioned and dimensioned relative to the nozzle such that ink is ejected preferentially from the chamber through the nozzle in droplet form during the ejection phase, and ink is alternately drawn preferentially into the chamber from the reservoir through the inlet during the refill phase.

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