Patent ID: 9550355
Date: 2017-01-24
CPC Classifications: B41J

Claim:
1. An apparatus for printing on a substrate, comprising: (a) a nozzle capable of emitting a stream of individual droplets of liquid toward the substrate; (b) a droplet charging section, downstream from the nozzle, capable of providing an electrical charge to the droplets; (c) a pair of spaced-apart, electrically conductive deflection plates, downstream from the nozzle; (d) a power source connected by an electrical circuit to the deflection plates to provide a voltage differential across the deflection plates and create an electrical field capable of deflecting the droplets to a desired location of the substrate; (e) a resistor positioned in the electrical circuit between the power source and the electrical field created between the deflection plates, wherein the resistor limits current from the power source to 0.1 to 0.3 mA, during electrical arcing between the deflection plates.