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Printhead nozzle having shaped heating element

  • US 7,794,050 B2
  • Filed: 04/13/2009
  • Issued: 09/14/2010
  • Est. Priority Date: 10/16/1998
  • Status: Expired due to Fees
First Claim
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1. A printhead nozzle comprising:

  • a substrate having drive circuitry and an inlet for ejection fluid;

    a fluid chamber having an outlet for ejection fluid, the fluid chamber arranged on the substrate to receive ejection fluid from the inlet; and

    a heating element defined outside the fluid chamber and connected to the drive circuitry, the heating element being relatively narrower proximate the drive circuitry and being arranged to be heated by the drive circuitry to cause the ejection fluid in the fluid chamber to be ejected through the outlet.

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