Rolling bolster

Claim 1

FOR USE WITH PRESSES AND THE LIKE HAVING A BED, THE COMBINATION COMPRISING A DIE-SUPPORTING CARRIAGE MOVABLE TOWARD AND AWAY FROM WORKING POSITION ON SAID PRESS BED AND IN PART FORMED OF A PAIR OF SPACED-APART WALLS, SAID CARRIAGE HAVING A LOWER PORTION FOR DISPOSITION UPON SAID PRESS BED AND AN UPPER SURFACE FOR SUPPORTING A DIE, A PAIR OF SHAFTS EXTENDING BETWEEN AND JOURNALED IN SAID WALLS IN SPACED, SIDE-BY-SIDE RELATION AND SAID SHAFTS HAVING ECCENTRIC PORTIONS ADJACENT RESPECTIVE WALLS, A WHEEL JOURNALED ON EACH ECCENTRIC SHAFT PORTION AFORESAID, DRIVE MEANS IN PART DISPOSED BETWEEN SAID WALLS AND CONNECTED WITH ONE OF SAID WHEELS FOR EFFECTING ROTATION THEREOF, AND AN ACTUATOR DISPOSED OUTSIDE EACH OF SAID WALLS AND EACH BEING CONNECTED TO A RESPECTIVE SHAFT AFORESAID TO EFFECT ROCKING MOVEMENT THEREOF BETWEEN A FIRST POSITION WHEREIN THE WHEELS CARRIED THEREBY PROJECT BENEATH THE LOWER PORTION OF SAID CARRIAGE WHEN THE LATTER IS TO BE MOVED AND A SECOND POSITION WHEREIN SAID WHEELS ARE RETRACTED ABOVE SUCH LOWER CARRIAGE PORTION WHEN SAID CARRIAGE IS IN WORKING POSITION ON SAID PRESS BED, SAID SHAFTS, WHEELS, ACTUATORS, AND DRIVE MEANS BEING DISPOSED DIRECTLY BENEATH SAID UPPER SURFACE.