Recorders – Electric recording – Electrochemical
Patent
1978-04-26
1980-01-01
Lucas, Jay P.
Recorders
Electric recording
Electrochemical
346150, G01D 1506, G03G 15048
Patent
active
041819128
ABSTRACT:
Groups of recording electrodes are alternatingly connected to two sets of data bus lines. A high voltage for electrostatic recording on a sheet of paper is applied from a power source to inputs of data switches which are connected to the respective bus lines. Power switches are provided between the power source and the sets of bus lines respectively to alternatingly gate the high voltage to the sets of bus lines. Opposite high voltages are sequentially applied to rear electrodes provided behind the recording electrode groups in synchronization with application of the high voltage to the data switches so that only the recording electrode group conjugate to the energized rear electrode applies an electrostatic recording charge to the paper. Data signals are applied to the data switches to cause the same to pass or block the high voltage to the individual bus lines in accordance with whether the data signals are logically high or low. Means are provided to minimize power consumption, storage time of the power switches and to apply the high voltage to the data switches for an optimum time at various recording speeds. The two sets of data switches may be embodied by only one set of data switches and suitable gate means.
REFERENCES:
patent: 3196451 (1965-07-01), Jones
patent: 3564556 (1971-02-01), Tsukatani
patent: 3653065 (1972-03-01), Brown, Jr.
patent: 3792495 (1974-02-01), Bliss
patent: 3979760 (1976-09-01), Tadauchi
patent: 4054885 (1977-10-01), Rothgordt
Alexander David G.
Lucas Jay P.
Ricoh Co. Ltd.
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