Patent ID: 7168778
Filing Date: 2007-01-30
Classification: B41J

Abstract:
1. A printhead cartridge for a multi-printhead ink jet printer, the cartridge comprising: an array of ink jet nozzles for ejection of an ink through the array of ink jet nozzles; and a heat sink for controlling a temperature of the array of ink jet nozzles, wherein the heat sink comprises a block of thermally conductive material in thermal contact with the array of ink jet nozzles and having formed therein a passageway for a thermally conductive fluid, the thermally conductive fluid being different from the ink, and a wing region of thermally conductive material in thermal contact with the array of ink jet nozzles, the wing region extending from the block substantially parallel to the array of ink jet nozzles and having a channel connected to the passageway of the block for circulating the thermally conductive fluid; wherein the wing region extends from opposite sides of the block substantially parallel to the array of ink jet nozzles, and has an extension in a direction perpendicular to the array of nozzles which is smaller than an extension of the block in a same direction; and