| 摘要 |
In an apparatus of the type wherein ink under pressure is applied to a nozzle which is vibrated so that the ink emitted from the nozzle thereafter breaks up into ink drops which are charged in a charging tunnel in response to a video signal, means are provided, in accordance with this invention, for compensating the amount of charge on each ink drop or the strength of the deflecting field action on the ink drop, on the basis of information from a detecting means which detects the amount of deflection of one or more calibrating drops periodically so that the amount of deflection of the drop of writing fluid for a given charge may be held to a predetermined value.
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