Printing – Antismut device – Anti-offset material application
Patent
1974-03-04
1976-06-22
Eickholt, E. H.
Printing
Antismut device
Anti-offset material application
346 74ES, 101DIG13, 178 66A, 340169, 355 17, G01D 1510, H04N 100
Patent
active
039643883
ABSTRACT:
A high speed non-impact printing means including (1) a non-impact printer having at least one pair of print electrodes, and a recipient sheet and closely spaced donor sheet positioned between the print electrodes, with the donor sheet having a substantially uniform distribution of electrically conductive, mobile printing particles dispersed near the surface thereof adjacent to the recipient sheet, (2) a print signal generator, (3) a variable coupling means associated with each print electrode pair for connecting the associated electrode pair to the print signal generator, and (4) a coupling control means for selectively varying the coupling afforded by each of said coupling means. Each variable coupling means comprises an optically controlled variable capacitance device which may be selectively controlled by the control means to couple the associated print electrode pair with the print signal generator by a predetermined capacitance. The electric field between each electrode pair, as established by the print signal coupled from the associated generator, is effective to transfer a plurality of the printing particles from the donor sheet to the recipient sheet, wherein the number of particles so transferred is related to the intensity of the electric field between the associated print electrodes.
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patent: 3304430 (1967-02-01), Biard et al.
patent: 3550153 (1970-12-01), Haeberle et al.
patent: 3554123 (1971-01-01), Lewallen
patent: 3613103 (1971-10-01), Harris
patent: 3631509 (1971-12-01), Marshall
patent: 3667007 (1972-05-01), Kressel et al.
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patent: 3762811 (1973-10-01), Matsumoto
patent: 3773417 (1973-11-01), Pressman et al.
patent: 3823262 (1974-07-01), Adams et al.
College Physics, Mendenhall-Eves-Keys-Sutton, D. C. Heath Co. 1944, pp. 466-471.
Eickholt E. H.
The Carter's Ink Company
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