Ink jet recording head

A laminated ink jet recording head integrally formed by sequentially laminating:

• a resilient plate for forming a vibration member having piezoelectric vibration elements on a surface thereof;
• a pressure producing chamber forming member for forming pressure producing chambers with a surface thereof sealed by the resilient plate;
• a seal plate sealing an other surface of the pressure producing chamber forming member and having therethrough a plurality of communication holes and ink supply paths, each communication hole and each ink supply path communicating with a selected corresponding pressure producing chamber at both a respective end portion of the pressure producing chamber,
• an ink supply constricted port forming plate having first ink supply constricted ports for imparting fluid resistance to ink supply paths to the pressure producing chambers and having communication holes communicating with the pressure producing chambers;
• a reservoir chamber forming plate having a reservoir chamber communicating with the pressure producing chambers through the ink supply constricted ports and communication holes communicating with the pressure producing chambers;
• and
• a nozzle plate sealing other surface of the reservoir chamber forming plate and having nozzles connected to the pressure producing chambers through the communication holes, such that
• each ink supply constricted port is formed one-sidedly toward a wall surface of the reservoir chamber, the wall surface being remote from the side of the nozzles;
• and
• dummy pressure producing chambers are formed at and most regions of the reservoir chamber and a plurality of ink supply constricted ports are formed across the width of the reservoir chamber so as to communicate with We dummy pressure producing chambers.