Abstract: An ink jet printer including an ink-supply system having: a lower ink container, an upper ink container, a liquid droplet deposition apparatus with nozzles, wherein an ink circulator is provided for circulating ink from the lower container to the upper container and from the upper container through the liquid droplet deposition apparatus (a printhead) back into the lower container and wherein the upper container, having a bottom and side walls and containing ink forming an ink surface, has a first compartment with an inlet for ink wherein the inlet contains a flow guiding device for avoiding directional flow of the ink towards the ink surface and a second compartment, separated from the first one by a partition placed between the first and second compartments so that the two compartments communicate only in a lower part of the upper container.