Enhanced Aerodynamic Compensation with Tilted Deflection Electrodes
Original Publication Date: 1980-Dec-01
Included in the Prior Art Database: 2005-Feb-14
Fig. 1 above shows typical flight paths of drops in an ink jet printer. Drops charged by the charge electrode 10 are deflected by the deflection electrodes 12. A drop that is not to be printed is given a high enough charge so that it is deflected along trajectory "c" to an ink drop gutter. Ideally, print drops would be given no charge and would fly along trajectory "a" to strike the print medium at point R0. However, because the print medium is moving and because of aerodynamic drag on the print drop and charge repulsion effects between print drops, an uncompensated print drop will strike the paper at an erroneous position. In the worst case, a drop that should strike the paper at position R0 is actually at position E0 at the time the position R0 passes through trajectory "a".