Negating the Effects of Sidewall Contamination in an Aspired Ink Jet Printer
Original Publication Date: 1982-Apr-01
Included in the Prior Art Database: 2005-Feb-09
In ink jet printers of the aspirated type, it is essential to continued operation that a means be used to inhibit sidewall contamination due to stray ink drops impinging upon the wall of the aspirator tunnel. This type of contamination is most prevalent during ink stream and air start up and shut down. Prior attempts to reduce such contamination have included extending the lower high voltage electrode up the non-conductive sidewalls of the tunnel to make the stray ink droplets contact the conductive extensions. In this manner the ink droplets which impinge upon the conductive extensions do not alter the electric field intermediate the high voltage electrodes, thereby inhibiting print drop distortion.