In an ink jet recording head, after a plate-shaped piezoelectric element is positioned and fixed onto a fixing plate, the piezoelectric element is sliced into a large number of vibrators and the leading ends of the vibrators are embracingly held in positioning holes 33 respectively formed in a top surface...http://www.google.de/patents/US5517225?utm_source=gb-gplus-sharePatent US5517225 - Ink jet recording head
