Patent ID: 7553000

Claim:
A head for ink-jet printer which discharge an ink, the head comprising: a cavity unit including a plurality of nozzles, a plurality of elongated pressure chambers communicating with the nozzles, respectively, and a manifold storing the ink to be supplied to the pressure chambers; an actuator unit having individual surface electrodes which are formed corresponding to the pressure chambers, respectively, electrode-drawing portions which are drawn in a longitudinal direction of the pressure chambers, respectively and are conducted to the individual surface electrodes, respectively, and land portions which are conducted to the electrode-drawing portions, respectively, the actuator changing volume of the pressure chambers respectively, when driving signal is supplied to the individual surface electrodes, so as to discharge the ink from the nozzles; and a flexible cable arranged to overlap with the actuator unit, and having a flexible and insulative substrate, a plurality of connection terminals formed on the substrate, and signal lines formed on the substrate and drawn from the connection terminals respectively; wherein: the land portions are electrically connected to the connection terminals, respectively; and three land portions, among the land portions, adjacent to one another in a short direction of the pressure chambers and on a signal-line drawn side at which the signal lines are drawn, are arranged to shift from one another in the longitudinal direction of the pressure chambers.