Original Publication Date: 1994-Feb-28
Included in the Prior Art Database: 2004-Apr-06
Xerox Disclosure Journal
Referring to the Figure IA, which is a front view of a printhead die, it has been observed that the drop directionality of the triangular nozzles 12 currently used in thermal ink jet print heads can be influenced by the location, on the nozzle surface, of the ink ligament of the ejecting drop. Often the ligament is attached to one of the corners of the triangular nozzle 12 and the drop is then steered in the direction of that corner. However, since two of the corners 14 and 16 of the nozzle are geometrically equivalent, it is not uncommon for the ligament to 'jump' corners, i.e., to switch to the other corner in which case the drop will be steered in the other direction. Drop ligament break-off can be a metastable situation, occurring from one of three corners in the triangular-shaped nozzle.