Die pads for ram type presses

Claim 1

IN A RAM PRESS ADAPTED TO PERFORM MULTIPLE OPERATIONS ON A WORKPIECE DURING EACH CYCLE OF OPERATION, A STATIONARY LOWER DIE SHOE AND AN UPPER DIE SHOE ADAPTED TO BE RECIPROCATED BY THE RAM, A DIE SET COMPRISING A DIE MEMBER MOVABLY MOUNTED ON EACH OF SAID DIE SHOES AND A COOPERATING DIE MEMBER FOR EACH MOVABLE DIE MEMBER FIXEDLY MOUNTED ON THE OTHER DIE SHOE, A HYDRAULIC CUSHION FOR EACH OF SAID MOVABLE DIE MEMBERS COMPRISING A CYLINDER HAVING A PISTON THEREIN REACTING AGAINST SAID MOVABLE DIE MEMBER, A SOURCE OF HYDRAULIC FLUID UNDER PRESSURE, FLUID CONNECTIONS BETWEEN SAID SOURCE AND SAID CYLINDERS THROUGH WHICH FLUID IS SUPPLIED TO SAID CYLINDERS TO ACTUATE SAID PISTONS AND THEREBY MOVE SAID MOVABLE DIE MEMBERS TO THEIR EXTENDED POSITIONS RELATIVE TO SAID DIE SHOES, A CHECK VALVE IN SAID CONNECTIONS PREVENTING RETURN FLOW THERETHROUGH, A BY-PASS AROUND EACH CHECK VALVE AND A NORMALLY CLOSED PRESSURE RELIEF VALVE IN SAID BY-PASS TO PROVIDE A PREDETERMINED RESISTANCE TO MOVEMENT OF SAID MOVABLE DIE MEMBERS TO THEIR RETRACTED POSITIONS UPON CLOSING OF THE PRESS, A BOOSTER CYLINDER COMMUNICATING WITH THE HYDRAULIC CUSHION CYLINDER ASSOCIATED WITH THE LOWER MOVABLE DIE MEMBER, AND MEANS FOR ACTUATING SAID BOOSTER CYLINDER WHEN THE RAM REACHES THE BOTTOM OF ITS STROKE TO INCREASE THE PRESSURE IN SAID LASTMENTIONED HYDRAULIC CUSHION CYLINDER ABOVE THE PRESSURE SUPPLIED THERETO FROM SAID SOURCE OF FLUID UNDER PRESSURE TO FORCE SAID LOWER MOVABLE DIE MEMBER UPWARDLY WITH ITS COOPERATING UPPER DIE MEMBER AS THE RAM BEGINS ITS RETURN STROKE, THEREBY TO PERFORM AN ADDITIONAL OPERATION ON THE WORKPIECE BETWEEN SAID MOVABLE DIE MEMBERS DURING SAID RETURN STROKE OF THE RAM.