| 摘要 |
<p>An electrohydrodynamic (EHD) exciter (3) is disclosed for promoting the formation of droplets (26) from a column (1) of electrically conductive fluid emitted under pressure from a nozzle (2). The exciter is composed of one, two, three or more pump electroes (8) (9) (10) of a length equal to about one half the droplet spacing (5). Multiple pump electrode embodiments are spaced at intervals of multiples of about one half the droplet spacing or wavelength (5). The exciter may be used in an ink jet printing system of the type wherein selected droplets (26) from a continuous stream of droplets are charged and deflected toward a target. The droplet placement on the target is determined by the amount of charge. </p> |
