Determining Ink Drop Velocity In An Ink Jet Printer By Stroboscopic Method
Original Publication Date: 1979-Apr-01
Included in the Prior Art Database: 2005-Feb-20
In one type of ink jet printer, a continuous stream of ink is projected from a nozzle, such as the nozzle 10 illustrated in the drawing. Because the ink stream is perturbated as by a crystal in the nozzle 10, the stream breaks up into discrete drops 11 inside a charge electrode 12, which charges at least selected ones of the ink drops to a predetermined potential consonant with the amount of deflection the ink drop is to receive due to its passage between deflection electrodes (not shown) downstream of the charge electrode 12. When the velocity of the drops is too high, drop resident time between the deflection electrodes is insufficient to cause the drops to be deflected to their proper height.