Patent ID: 7140083

Claim:
A method of manufacturing an ink jet printer head including (a) a plurality of cavity units each of which has a plurality of nozzles, a plurality of ink chambers which communicate with the plurality of nozzles, respectively, and in each of which an ink is accommodated, and a plurality of ink channels communicating with the plurality of nozzles via the plurality of ink chambers, respectively, and (b) a plurality of actuators each of which applies an energy to each of the ink chambers of a corresponding one of the cavity units so as to eject a droplet of the ink from a corresponding one of the nozzles via a corresponding one of the ink channels, the method comprising the steps of: preparing a plurality of nozzle sheets each of which has the plurality of nozzles, two first positioning holes, and two second positioning holes, preparing a plurality of channel units each of which has the plurality of ink chambers to accommodate the ink and communicate with the plurality of nozzles, respectively, of a corresponding one of the nozzle sheets, and the plurality of ink channels to communicate with the plurality of nozzles of said corresponding nozzle sheet via the plurality of ink chambers, respectively, causing two first positioning pins of a first jig to fit in the two first positioning holes of said each of the nozzle sheets so as to position said each nozzle sheet relative to the first jig, fixing said each nozzle sheet positioned relative to the first jig, and a corresponding one of the channel units that is positioned relative to the first jig, to each other, so as to provide a corresponding one of the cavity units, causing a first pair of second positioning pins of a second jig to fit in the two second positioning holes of the nozzle sheet of a first one of the cavity units, and causing a second pair of second positioning pins of the second jig to fit in the two second positioning holes of the nozzle sheet of a second one of the cavity units, so that the first and second cavity units are positioned relative to the second jig and are thereby positioned relative to each other, and fixing the first and second cavity units positioned relative to each other, to a frame member.