Abstract: An apparatus and method for supplying ink to a multiple printhead ink pen within a printer. Each of a plurality of stationary ink cartridges has a nozzle for refilling an associated reservoir in the ink pen. The pen moves into registration with a nozzle associated with the particular reservoir requiring refilling. A pressurizer pressurizes all of the ink cartridges in unison. A yoke extends along the cartridges to hold all of the nozzles, and advances all of the nozzles so that the associated nozzle couples with the pen reservoir. A valve in the associated nozzle is opened by the coupling with the pen to initiate ink flow into the reservoir. Valves in the uncoupled nozzles remain closed. The valve in the associated nozzle automatically closes when all of the nozzles are retracted by the yoke at the end of the refilling operation.