Patent ID: 8002393

Claim:
A print engine for a printhead assembly, the print engine comprising: a refillable cartridge having a body defining a plurality of fluid chambers, the body having a lid assembly with a plurality of ink refill ports leading to respective fluid chambers, the lid assembly having an actuator to actuate a refill unit; a number of micro-electromechanical nozzle arrangements configured to operatively eject printing fluid onto a printing medium; and a fluid distribution member operatively arranging the nozzle arrangements in fluid communication with respective fluid chambers, wherein the lid assembly engages with the refill unit to actuate the refill unit, the refill unit includes an outlet adapted to engage with the plurality of ink refill ports, a fluid reservoir, and an ejector assembly configured to incrementally eject fluid from the reservoir when the ejector assembly is actuated by the actuator during operative engagement of the print cartridge by the lid assembly, and each fluid chamber includes a stack of polymer layers with a micro-capillary array of channels formed therein to form an absorbent assembly within the fluid chamber.