Patent ID: 7229159

Claim:
An ink-jet head comprising: a passage unit that includes a common ink chamber and a plurality of individual ink passages each extending from the common ink chamber through a pressure chamber to a nozzle, and a reservoir unit that is fixed to the passage unit and includes an ink reservoir which stores ink; wherein the reservoir unit includes: an introduction passage that connects an ink introduction port into which ink is introduced and an inflow port, one or more discharge passages that communicate the ink reservoir with the common ink chamber, and a filter that extends along a plane within the introduction passage so as to divide the introduction passage into an upper passage and a lower passage; wherein the introduction passage has such a configuration in the introduction passage that constricts the ink flow so that, on both sides of the filter, ink can flow along the filter toward the inflow port; and wherein the flow is constricted in the introduction passage by an ink non-passing area formed within the introduction passage, the ink non-passing area extending continuously, from at least a part of an area on the plane opposed to the inflow port, in a direction away from the inflow port in the introduction passage.