Charging signal supply circuit for ink jet system printer

Details Charging signal supply circuit for ink jet system printer Charging signal supply circuit for ink jet system printer

1974-09-26

1976-09-14

Hartary, Joseph W.

Recorders

Record receiver deforming

307236, G01D 1800

Patent

active

039810194

ABSTRACT:
An ink jet system printer of the charge amplitude controlling type wherein a predetermined phase relationship is established between separation of ink drops from a nozzle to a record receiving member and application of charging signals to a charging electrode, through detection of the amplitude of charge carried on ink drops contributable to phase determination. Charging signals of one polarity containing intelligence signals are supplied to the charging electrode to charge ink drops contributable to printing, whereas phase detecting signals of the opposite polarity to that of the charging signals are supplied to the charging electrode for the purpose of charging ink drops contributable to phase determination. Both of the charging signals and the phase detecting signals are mixed in a mixer circuit arrangement of a simple construction which consists of a pair of switches, before both signals are supplied to the charging electrode.

REFERENCES:
patent: 3154697 (1964-10-01), Widmer et al.
patent: 3596276 (1971-07-01), Lovelady
patent: 3750191 (1973-07-01), Naylor
patent: 3866237 (1975-02-01), Meier

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