Parallel flow water cooling system for printbars

A device for cooling a printbar including at least one print die using a coolant, the device comprising:

• a heat exchange gallery in thermal contact with at least one print die;
• a coolant inlet directing the coolant towards the heat exchange gallery;
• a plurality of channel inlets distributed along the heat exchange gallery and connected to channel the coolant in substantially equal amount through each of the channel inlets into the heat exchange gallery;
• means interconnected between the coolant inlet and the plurality of the channel inlets for distributing substantially equal amount of coolant to each of the channel inlets;
• and
• a coolant outlet directing the coolant out of the heat exchange gallery.

A device for cooling an array of print dies using a coolant comprising:

• means for delivering the coolant towards the array of print dies;
• a plurality of channel inlets for directing substantially equal amounts of the coolant at substantially the same temperature to each point along the width of the array of print dies;
• and
• means for channelling the coolant away from the array of print dies.

A method of cooling an array of print dies, comprising the steps of:

• introducing a coolant into a plurality of channel inlets, the coolant being at substantially the same temperature and in substantially equal amounts in each of the channel inlets;
• directing the coolant in each channel inlet toward a different point along a width of a surface in thermal contact with the array of print dies;
• and
• directing the coolant away from the surface in thermal contact with the array of print dies.