Drop charging method for liquid drop recording

Details Drop charging method for liquid drop recording Drop charging method for liquid drop recording

1974-06-27

1976-03-30

Hartary, Joseph W.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346 75, G01D 1518

Patent

active

039478513

ABSTRACT:
Method of recording with a stream of marking fluid drops in which a predetermined plurality of successively formed drops in a stream each have the same electrical charge induced therein so that, when subsequently subjected to an electrostatic field, all drops of one commonly charged plurality will impact a record member at approximately the same spot. Drop charges are induced therein by asynchronously applied charging signal levels, each having a duration which is a function of the drop formation frequency and equal to at least two drop periods.

REFERENCES:
patent: 3373437 (1968-03-01), Sweet et al.
patent: 3596275 (1971-07-01), Sweet
patent: 3787881 (1974-01-01), Duffield
patent: 3846800 (1974-11-01), Chen

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