Longitudinal registry means for flexographic press

Claim 1

IN A FLEXOGRAPHIC PRINTING PRESS FOR PRINTING WITH ALCHOHOL BASE INK ON A STRETCHABLE WEB A PLURALITY OF COLOR IMAGES IN PREDETERMINED REGISTRY WITH EACH OTHER, A PLURALITY OF COLOR PRINTING UNITS, A MAIN DRIVE SHAFT PROVIDING THE SOURCE OF POWER FOR OPERATING THE PRESS, WITH EACH OF SAID UNITS INCLUDING A PLATE CYLINDER CARRYING A PRINTING PLATE, AN IMPRESSION CYLINDER ADAPTED TO MAINTAIN IN REPEATING SUCCESSION THE WEB IN PRINTING CONTACT WITH THE PLATE, GEAR MEANS DRIVINGLY CONNECTING SAID MAIN DRIVE SHAFT WITH EACH COLOR PRINTING UNIT, RESPECTIVELY, TO ROTATE THE PLATE CYLINDER THEREOF, MEANS TO PASS THE WEB THROUGH THE COLOR PRINTING UNITS AT A SPEED SUBSTANTIALLY EQUAL TO THE PERIPHERAL SPEED OF THE PRINTING PLATE OF THE RESPECTIVE UNITS FOR PRINTING CONTACT THEREWITH, A DEVICE FOR CONTROL OF REGISTRY AND CORRECTION OF MISREGISTRY IN THE DIRECTION LONGITUDINALLY OF THE WEB, SAID DEVICE OPERATIVE TO SET THE PLATE CYLINDER OF THE RESPECTIVE COLOR PRINTING UNIT FORWARDLY OR REARWARDLY WITH RESPECT TO PRIOR COLOR PRINTED ON THE WEB TREADED THERETHROUGH, SAID CONTROL INCLUDING A PLANETARY GEAR MECHANISM OPERATIVELY INTERPOSED WITHIN THE DRIVING GEAR MEANS FROM THE MAIN DRIVE SHAFT OF THE RESPECTIVE COLOR UNIT, MANUALLY CONTROLLED MEANS ACTING ON SAID PLANETARY GEAR MECHANISM TO ADVANCE OR TO SET BACK ONE OF THE GEARS OF THE GEAR TRAIN BETWEEEN THE MAIN DRIVE SHAFT AND SAID IMPRESSION CYLINDER TO EFFECT ADVANCING OR SETTING BACK SAID PLATE CYLINDER WITH RESPECT TO THE PRIOR COLOR PRINTED ON THE WEB WITHIN FULL 360 DEGREES OF ROTATION OF SAID CYLINDERS TO EFFECT A NECESSARY CORRECTION OF MISREGISTRY , PHOTO-ELECTRIC CELL MEANS ADAPTED TO DETECT OCCURRENCE OF MISREGISTRY TO THE SECOND AND SUBSEQUENT COLOR UNITS, AND DRIVING MEANS CONCOLOR PRINTED BY SAID FIRST UNIT, AND DRIVING MEANS CONTROLLED BY SAID PHOTO-ELECTRIC CELL PROVIDED IN THE SECOND AND SUBSEQUENT COLOR PRINTING UNITS AND MECHANICALLY CONNECTED TO THE MANUAL CONTROL MEANS THEREOF TO MAKE THE CORRECTION OF MISREGISTRY IN RESPONSE TO THE OPERATION OF SAID PHOTO-ELECTRIC CELL MEANS.