Patent ID: 7401902

Claim:
A nozzle arrangement for an inkjet printhead, the nozzle arrangement comprising: a substrate assembly defining an ink inlet channel; a nozzle chamber structure extending from the substrate assembly and defining a nozzle chamber in fluid communication with the ink inlet channel and an ink ejection port through which ink from the nozzle chamber can be ejected; an ink ejection paddle extending across the nozzle chamber between the ink inlet channel and the ink ejection port; a thermal bend actuator anchored to the substrate assembly at a location external the nozzle chamber and coupled to the paddle so that, upon actuation, the paddle moves to eject ink in the nozzle chamber out through the ink ejection port; an anchor which is anchored to the substrate assembly; and an actuator arm that has a fixed end fixed to the anchor and a working end displaceable towards and away from the substrate upon receipt of a drive signal in the form of a current pulse emanating from the substrate assembly.