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Inkjet printer having a printhead with a bi-layer thermal actuator coil

  • US 7,549,731 B2
  • Filed: 06/15/2008
  • Issued: 06/23/2009
  • Est. Priority Date: 07/15/1997
  • Status: Expired due to Fees
First Claim
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1. A printhead for an inkjet printer, the printhead having a plurality of micro-electromechanical ejection mechanisms arranged in a wafer substrate, each mechanism comprising:

  • chamber walls and a roof formed on said substrate to define an ink chamber, one wall defining a slot therein, and an ink supply channel defined through the substrate to said chamber; and

    a bi-layer thermal actuator coil fast with the substrate and ending in a strut extending through the slot, said strut fast with a paddle device within the chamber.

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