Patent ID: 7090340
Filing Date: 2006-08-15
Classification: B41J

Abstract:
1. A recording head, comprising: a nozzle plate having nozzles for discharging ink droplets arranged in a row; a plurality of pressure generating chambers communicating to the nozzles, the plurality of pressure generating chambers including a first pressure generating chamber and a second pressure generating chamber; a diaphragm formed on one face of the pressure generating chamber; a piezoelectric element for displacing the diaphragm, wherein the first pressure generating chamber is disposed on one side of the nozzles arranged in the row, and the second pressure generating chamber is disposed on the other side, and the first and second pressure generating chambers are opposed to each other across the nozzles arranged in the row so that central lines of the first and second pressure generating chambers are almost coincident; and a communication flow passage leading from the plurality of pressure generating chambers to the nozzles, wherein a width of one of the first and second pressure generating chambers is defined by two side wall faces, and wherein a portion of the communication flow passage is located outside the width of one of the first and second pressure generating chambers.