Patent ID: 6536873
Filing Date: 2003-03-25
Classification: B41J

Abstract:
A drop-on-demand ink jet printer capable of directional control of ink drop ejection for selective placement upon a receiver, comprising:(a) a print bead body having an ink ejection orifice adapted to poise an ink meniscus thereat about a center axis passing through the orifice; (b) a deflector coupled to said print head body and adapted to be in communication with the poised meniscus for lowering surface tension of a region of the poised meniscus, so that the poised meniscus deflects away from the region of lower surface tension and away from the center axis to define a deflected meniscus, whereby an ink drop separated from the deflected meniscus travels at an angle with respect to the center axis and deposits upon the receiver, and drop separator separates the ink drop at a predetermined velocity.