DROPLET GENERATOR WITH RETAINED APERTURE PLATE
Original Publication Date: 1987-Feb-28
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
In continuous stream type ink jet printheads, the droplet generator generally comprises a housing having a predetermined internal acoustic cavity maintained full of pressurized ink, a pressure wave generator such as a piezoelectric driver to perturbate the ink in the cavity at a certain frequency, and an aperture plate with one or more apertures or nozzles therein through which the ink streams flow. Perturbation of the ink in the cavity causes it to break up at a fixed distance from the nozzles, whereat the droplets are uniquely charged in accordance with digitized data signals, so that their trajectories through an electrostatic field cause the droplets to impact a recording medium at specific pixel locations.