Patent ID: 7470005

Claim:
A nozzle arrangement for an inkjet printer, said arrangement comprising: a substrate defining a chamber with an ink inlet and ejection port, said substrate having a CMOS drive layer; a paddle dividing said chamber into an ink chamber and a nozzle chamber; an actuating arm coupled to the paddle by means of a paddle extension portion and a bridging portion, said arm having an outer arm portion mechanically linked to an inner arm portion via posts electrically isolating the inner arm portion from said outer arm portion, the arm being pivotal with respect to the substrate during operative electrical thermal expansion of the inner arm portion displacing the paddle towards the ejection port; and a movement sensor having a moving contact element formed integrally with the inner arm portion and a fixed contact element formed integrally with the CMOS layer, the moving contact completing an electrical circuit when contacted with the fixed contact element when the arm pivots to a predetermined extent.