Rotary printing machines

Claim 1

IN COMBINATION WITH APPARATUS FOR MOVING A WEB THROUGH PRINTING MEANS AND THEREAFTER THROUGH A DRYING CHAMBER AND INCLUDING A STATIONARY FRAME SUPPORTING THE PRINTING MEANS, MEANS FOR MOVING THE WEB AT A PREDETERMINED SPEED, AND A PLURALITY OF INKING ROLLERS FOR SUPPLYING INK TO THE PRINTING MEANS, THE IMPROVEMENT COMPRISING: A MOVABLE CARRIAGE SUPPORTING THE INKING ROLLERS; DRIVING MEANS MOVING THE CARRIAGE TOWARDS AND AWAY FROM THE PRINTING MEANS TO SELECTIVELY SUPPLY INK TO THE PRINTING MEANS, THE DRIVING MEANS INCLUDING A FLUID PRESSURE ACTUATED PISTON AND CYLINDER DEVICE, A LEVER PIVOTALLY MOUNTED ON THE CARRIAGE AND PIVOTED IN RESPONSE TO ACTUATION OF THE PISTON AND CYLINDER DEVICE, A TURNABLE ECCENTRIC MOUNTED ON THE CARRIAGE AND ECCENTRICALLY ROTATABLE RELATIVE TO THE CARRIAGE IN RESPONSE TO PIVOTING OF THE LEVER. AND AN ARM JOINING THE ECCENTRIC AND THE STATIONARY FRAME AND CONTROLLING THE MOVEMENT OF THE CARRIAGE; AND SYNCHRONOUS MEANS RESPONSIVE TO THE SPEED OF THE WEB MOVING MEANS AND OPERATIVELY CONTROLLING THE DRIVING MEANS FOR AUTOMATIC SHIFTING OF SAID CARRIAGE AWAY FROM THE PRINTING MEANS WHEN THE WEB IS ADVANCED AT A SPEED LESS THAN SAID PREDETERMINED SPEED AND FOR AUTOMATIC SHIFTING OF THE CARRIAGE TOWARD THE PRINTING MEANS WHEN THE WEB IS ADVANCED AT A SPEED AT LEAST EQUAL TO SAID PREDETERMINED SPEED, THE SAID SYNCHRONOUS MEANS INCLUDING A FLUID VALVE COMMUNICATING WITH THE PISTON AND CYLINDER DEVICE AND OPERABLE TO CONTROL TRANSMISSION OF FLUID TO THE PISTON AND CYLINDER DEVICE, AN ACTUABLE SOLENOID OPERATIVELY CONTROLLING THE FLUID VALVE, AN ELECTRIC SWITCH CONTROLLING THE ACTUATION OF THE SOLENOID, AND CAM MEANS ENGAGING THE SWITCH AND RESPONSIVE TO CHANGES IN THE SPEED TO THE WEB MOVING MEANS.