A droplet jet device for use in an ink jet printer. The device has a bottom ceramics plate into which parallel grooves for storing ink are cut. A covering plate is either fixedly or slidably mounted over the grooved side of the ceramic plate to enclose the grooves. The sidewalls of the grooves have electrodes...http://www.google.de/patents/US5410341?utm_source=gb-gplus-sharePatent US5410341 - Droplet jet device
