B - Operations – Transporting – 41 – J
Patent
B - Operations, Transporting
41
J
101/96.0202
B41J 2/17 (2006.01)
Patent
CA 1224669
INK JET PRINTER AND METHOD OF START-UP AND SHUTDOWN THEREOF Abstract of the Disclosure An ink jet printer includes a print head means for producing at least one jet drop stream from a fluid filament emerging therefrom, and charge electrode means for inducing electrical charges on drops formed from the fluid filament. The charge electrode means is movable into and out of an operating position in which it is adjacent and at least partially surrounds the fluid filament. A deflection field is established prior to start-up in which the field has a non-zero electrical potential in the region of the fluid filament. At start-up and shutdown of the printer, the charge electrode means is retracted from its normal operating position and drops are charged by the deflection field. As a consequence, the charge electrodes are not contaminated by ink from the unstable jets. The drops in the jet drop streams are, however, charged and deflected to a catcher by the deflection field. After stable operation is obtained, the charge electrode means is moved into its normal operating position. At shutdown of the printer, this sequence of steps is reversed.
460301
Gowling Lafleur Henderson Llp
The Mead Corporation
LandOfFree
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