(57) In a jet type printing system a plurality of ink jets are provided in line in the
direction of carriage movement. The ink jets are deflected to print in a conventional
manner and also pass by charging electrodes which charge individual droplets as they
are broken off from the jets. The charging electrodes are provided with a charge to
produce scanning transverse to the direction of carriage movement such that if no
charge is provided, ink will be caught in a catcher and returned to the ink reservoir
for reuse. By interlining the lines a faster more effective printing occurs. Interlining
may be done in accordance with several stated methods. An alternative provides ink
jets one above the other with deflection means causing deflection to occur in opposite
directions so that one effectively scans up and the other scans down, this alternative
preferably employing a pair of ink catchers for the respective jets.
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