Recorders – Record receiver deforming
Patent
1982-09-15
1984-12-25
Goldberg, E. A.
Recorders
Record receiver deforming
346140R, G01D 1518
Patent
active
044907290
ABSTRACT:
An ink jet printer for depositing drops of ink at a plurality of print positions on a moving print receiving medium includes a print head producing at least one jet drop stream directed toward the medium and a charge electrode positioned adjacent the point of drop formation of the jet drop stream. A charging means repetitively applies a high guard drop potential to the charge electrode during formation of at least every second drop for charging of the drops to a guard charge level. During formation of the remainder of the drops, either one of a number of relatively low print potentials or a substantially larger catch potential is applied to the charge electrode. Drops formed during application of a print potential to the electrode may carry a charge of either electrical polarity due the drop-to-drop cross talk from previously formed guard drops. Drops carrying a guard charge level and drops carrying a catch charge level are deflected by an electric field to a catcher, and drops carrying any of the print charge levels are deflected by the field to associated print positions on the medium.
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Clark Frederic L.
Wallace David B.
Goldberg E. A.
Reinhart Mark
The Mead Corporation
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