| 摘要 |
To control the velocity of ink drops ejected from nozzles of a drop-on-demand printer, an electrical field is established along the nozzle axis. An electrical charge is induced in the drops, possibly using the same field, and the drops are accelerated by action of the electric field on the charge retained by the drops. In this way, satellite drops can be caused to accelerate toward the principal drop in flight. Also, in a greyscale printer, it is possible to compensate for differential air drag between differently sized drops.
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