Patent ID: 7147304
Filing Date: 2006-12-12
Classification: B41J

Abstract:
1. A pagewidth inkjet printhead assembly which comprises: an elongate substrate that defines a plurality of ink inlet channels; a drive and control circuitry layer positioned on the substrate; a plurality of nozzle chamber structures arranged on the substrate to define a number of longitudinally extending sets of nozzle chamber structures, each set having a series of adjacent pairs of nozzle chamber structures, each nozzle chamber structure defining a nozzle chamber in fluid communication with a respective ink inlet channel and an ink ejection port in fluid communication with the nozzle chamber; a plurality of elongate micro-electromechanical actuators fast at one end to the substrate to receive electrical drive signals from the drive and control circuitry layer; and a plurality of ink ejecting members positioned in respective nozzle chambers and fast with respective opposite ends of the micro-electromechanical actuators to be displaced relative to the substrate on receipt of a drive signal by the associated actuator, thereby ejecting ink from the ink ejection port; wherein the nozzle chamber structures and the associated micro-electromechanical actuators are configured so that a region between sets contains consecutively overlapping actuators.