Charge Electrode Positioning in Ink Jet Printers
Original Publication Date: 1978-May-01
Included in the Prior Art Database: 2005-Feb-20
For accurate drop placement (distortion free characters) in deflected drop ink jet printers, the ink stream must be centered in the charge electrode within a small tolerance. In existing ink jet printers, such as the IBM 6640, the manufacturing assembler or customer engineer adjusts the charge electrode relative to the ink stream while sighting through an illuminated auxiliary hole in the charge electrode. In this technique, the charge electrode wall surfaces are not well defined for the observer. Consequently, it is difficult to attain centering of the ink jet within the required tolerance in the charge electrode.