Ink fountain and ductor roll drive

Claim 1

IN COMBINATION: A FOUNTAIN ROLLER, A VIBRATOR ROLLER, A DUCTOR ROLLER; AND AN INK FOUNTAIN DRIVE COMPRISING A CAM SHAFT, A CAM CARRIED AND DRIVEN BY SAID SHAFT, UNIDIRECTIONAL DRIVE MEANS DRIVING THE FOUNTAIN ROLLER, A FIRST FLUID-POWERED ACTUATOR FOR INTERMITTENTLY DRIVING SAID UNIDIRECTIONAL DRIVE MEANS, MOUNTING MEANS MOUNTING THE DUCTOR ROLLER FOR SWINGING MOVEMENT BETWEEN A FIRST POSITION WHEREIN IT CONTACTS AND ROTATES WITH THE FOUNTAIN ROLLER, AND A SECOND POSITION WHERE IT CONTACTS THE VIBRATOR ROLLER, A SECOND FLUID-POWERED ACTUATOR FOR MOVING THE MOUNTING MEANS TO MOVE THE DUCTOR ROLLER TO EACH OF THE SAID TWO POSITIONS, FLUID-VALVING MEANS RESPONSIVE TO THE CAM ADAPTED TO SIMULTANEOUSLY ACTUATE AND DEACTUATE THE ACTUATORS, THE ACTUATORS COMPRISING PISTON-CYLINDER ASSEMBLIES, AND THE FLUID-VALVING MEANS BEING CONNECTED TO ALL OF SAID ASSEMBLIES TO ACTUATE THEM SIMULTANEOUSLY, A FIRST AND A SECOND POWER SOURCE, BOTH POWER SOURCES BEING CONNECTED TO THE CAM SHAFT TO ACTUATE THE SAME IN THE SAME DIRECTION, AND EACH ADAPTED TO BE OVERRIDDEN BY THE OTHER POWER SOURCE, WHEREBY THE CAM SHAFT MAY BE DRIVEN BY EITHER OF SAID POWER SOURCES INDEPENDENTLY OF THE OTHER, AND THE FREQUENCY OF ACTUATION OF THE CAM AND THEREBY THE VALVING MEANS AND ACTUATORS BEING DETERMINABLE BY EITHER OF SAID POWER SOURCES, AND A SOURCE OF STATIC PRESSURE CONNECTED TO THE ACTUATORS OPPOSED TO THE FLUIDVALVING MEANS TO BIAS THE MOUNTING MEANS TOWARD ONE OF SAID POSITIONS, PRESSURE FROM THE FLUID-VALVING MEANS OVERCOMING SUCH STATIC PRESSURE TO MOVE THE MOUNTING MEANS TO THE OTHER OF SAID POSITIONS.