Recorders – Electric recording – Electrochemical
Patent
1978-11-24
1981-06-02
Wolff, John H.
Recorders
Electric recording
Electrochemical
G01D 1506, G11B 908
Patent
active
042714176
ABSTRACT:
Disclosed is a method and apparatus for charging a charge retentive surface of a record medium with a latent electrostatic image. The apparatus comprises a plurality of arrays of recording electrodes. The arrays are alternately divided into first and second groups of arrays. A plurality of complementary electrodes are mounted adjacent the record medium in electrical cooperative relationship with a single array in each of the first and second groups of arrays. The apparatus further includes a control circuit for the recording and complementary electrodes. The control circuit comprises a first group actuating circuit for actuating like-numbered recording electrodes in each array in the first group of arrays, a second group actuating circuit for actuating like-numbered recording electrodes in each array of the second group of arrays, and complementary electrode actuating circuitry for actuating complementary electrodes in electrically cooperative relationship with a selected array of recording electrodes. The method and apparatus is characterized in that the first and second group actuating circuits and the complementary electrode actuating circuits are enabled in such a sequence that no complementary electrode is twice actuated without the intervening actuation of at least one other complementary electrode.
REFERENCES:
patent: 3611419 (1971-10-01), Blumenthal
patent: 3653065 (1972-03-01), Brown, Jr.
patent: 3662396 (1972-05-01), Brown, Jr.
patent: 3792495 (1974-02-01), Bliss
patent: 4030107 (1977-06-01), Tagawa
patent: 4054885 (1977-10-01), Rothgordt
Blumenthal John
Moore Chad Z.
Gould Inc.
Sachs Edward E.
Wolff John H.
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