Importance

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Abstract

A pagewidth inkjet printhead assembly includes an ink supply assembly that spans a print medium, in use. A number of printhead segments are mounted on the ink distribution assembly to span the print medium, in use. Each segment includes a substrate that defines a number of ink inlet channels. Each ink inlet channel is in fluid communication with a corresponding ink supply assembly. Micro-electromechanical nozzle arrangements each include nozzle chamber walls that define a nozzle chamber and an ink ejection port, in fluid communication with the nozzle chamber. An elongate actuator is anchored, at one end, to the substrate and is displaceable with respect to the substrate on receipt of an electrical current. An ink ejection member is fast with an opposite end of the actuator and is positioned in the nozzle chamber such that the ink ejection member acts to eject ink from the nozzle chamber when the actuator is displaced. Drive circuitry for each actuator is interposed between the actuator and the substrate to supply the actuator with said electrical current and to control operation of the actuator.

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First Claim