Controlled ink-jet copy-reproducing apparatus

Abstract

Abstract A CONTROLLED INK-JET APPARATUS FOR PRODUCING MULTI-COLOR REPRODUCTION OF A SUBJECT COPY COMPRISES A PHOTOELECTRIC SCANNER FOR DEVELOPING VIDEO SIGNALS REPRESENTATIVE OF THE RED, GREEN, AND BLUE COMPONENTS OF THE SIGNAL PICKED UP BY THE SCANNER. THE COPY IS REPRODUCED ON A RECORD SHEET DISPOSED ON A DRUM ROTATED IN SYNCHRONISM WITH THE SCANNER. FOR EACH COLOR COMPONENT THERE IS PROVIDED A SET OF INK JETS DISPOSED ON A HEAD WHICH SCANS THE RECORD SHEET. EACH SET COMPROSES A PLURALITY OF INK JETS OR NOZZLES. THE JETS FROM THESE NOZZLES PASS THROUGH INDIVIDUAL ELECTRIC CHARGING CYLINDERS WHICH INDIVIDUALLY CHARGE THE INK DROPLETS EMERGING FROM THE JETS AND THESE DROPLETS THEN TRAVERSE REFLECTING FIELDS WHICH DIRECT THE INK DROPS EITHER TO THE RECORD SHEET OR TO THE DRAIN. BY SUPPLYING INKS OF DIFFERENT OPTICAL DENSITIES TO THE SEVERAL JETS OF EACH SET AND BY SELECTIVELY DEFLECTING INK FROM PREDETERMINED JETS TO THE DRAIN, THE OPTICAL DENSITY OF EACH INK SPOT ON THE RECORD CAN BE CONTROLLED OVER A WIDE RANGE OF VALVES TO PRODUCE EFFECTIVELY A CONTINUOUS TONE COLOR REPRODUCTION OF THE ORIGINAL COPY

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