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A refillable ink cartridge that has a pagewidth printhead supported on a moulding assembly that defines the ink reservoirs. The printhead has a series of holes etched on a back surface thereof for the supply of ink to a front surface of the printhead for ejection. The moulding assembly has an elongate top moulding piece and an elongate bottom moulding piece that together define a plurality of elongate ink reservoirs. The bottom moulding piece having apertures for supplying ink to the series of holes on the back surface of the pagewidth printhead. Each of the ink reservoirs are in fluid communication with at least one of the apertures but each of the apertures are in fluid communication with only one of the ink reservoirs. Each of the ink reservoirs are in fluid communication with a respective refill port and corresponding air vent.
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