FLUID JET DEFLECTION BY MODULATION AND COANDA SELECTION

摘要

1446269 Ink jet printers INTERNATIONAL BUSINESS MACHINES CORP 29 Oct 1974 [21 Dec 1973] 46682/74 Heading B6F An ink jet printer comprises means generating a stream of ink drops of two alternative diameters and a droplet deflection surface 23 which deflects the larger droplets but does not substantially deflect the smaller droplets. The larger droplets are partially intercepted by the surface 23 and deflected by the Coanda effect. The size of the droplets may be determined by amplitude or frequency modulation of a signal to an electrode 19 surrounding the stream of ink.