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BINARY CONTINUOUS THERMAL INK JET BREAK OFF LENGTH MODULATION

IP.com Disclosure Number: IPCOM000025964D
Original Publication Date: 1989-Jun-30
Included in the Prior Art Database: 2004-Apr-04

Publishing Venue

Xerox Disclosure Journal

Abstract

In Figure 1, a basic continuous stream type ink jet system 10 is shown. Droplet generator 12 has apertures or nozzles 14 which emit continuous pressurized streams 16 of ink from a cavity (not shown) within the droplet generator. A pressure perturbation (typically formed from a single piezoelectric transducer, not shown) breaks up the continuous ink streams into ink droplets 18 a predetermined distance downstream from the nozzles. Prior to break off, the ink streams are individually charged to various levels by an array of discrete charge tunnels 20. When the droplets break off from the streams, they are charged. These charged droplets are then deflected by varying degrees depending on the droplet charge by a deflection plate 22 common to all of the droplet streams.