Actuating mechanism for tension lockup printing plate cylinders

Claim 1

IN A TENSION LOCK-UP CYLINDER HAVING A LONGITUDINALLY DISPOSED FINGER SHAFT JOURNALED THEREIN FOR ROTATION BETWEEN PLATE UNLOCKING AND LOCKING POSITIONS AND CARRYING FINGERS RESILIENTLY BIASED FOR ENGAGING AND TENSIONING A PRINTING PLATE WHEN IN THE LOCKING POSITION, THE COMBINATION COMPRISING A HUB JOURNALED ON THE CYLINDER FOR ROTATION BETWEEN FIRST AND SECOND ANGULAR POSITIONS IN A PLANE RADIAL OF THE CYLINDER, A RADIAL ARM RIGID WITH THE FINGER SHAFT, A LINK PIVOTALLY CONNECTED AT ONE END THEREOF TO SAID ARM, A FLOATING PIVOT CONNECTION BETWEEN THE OTHER END OF SAID LINK AND SAID HUB, MEANS DEFINING A SOCKET IN SAID HUB, A HAND LEVER HAVING ONE ND REMOVABLY INSERTABLE INTO SAID SOCKET FOR EFFECTING ROTATION OF SAID HUB, SAID FLOATING PIVOT CONNECTION INCLUDING FIRST AND SECOND TRANSVERSE PINS CARRIED BY SAID LINK, MEANS ON SAID HUB FOR FORCING THE FIRST PIN AND LINK TO SHIFT SAID ARM AND SHAFT TOWARD THEIR LOCKING POSITIONS WITH AN INCREASING MECHANICAL ADVANTAGE AS SAID LEVER ROTATES SAID HUB FROM ITS FIRST TOWARD ITS SECOND POSITION, AND FURTHER INCLUDING MEANS ON SAID HUB FOR SUCCESSIVELY