A method for causing ink to be ejected from an ink chamber of an ink jet printer includes causing a first bolus of ink to be extruded from the ink chamber; and following lapse of a selected interval, causing a second bolus of ink to be extruded from the ink chamber. The interval is selected to be greater...http://www.google.com/patents/US7988247?utm_source=gb-gplus-sharePatent US7988247 - Ejection of drops having variable drop size from an ink jet printer
