taylor etal

Claim 1

IN A DIE ROLL FOR FORMING SOFT PLASTIC CAPSULES FROM PLASTIC SHEET MATERIAL WHICH COMPRISES: A SUBSTANTIALLY CYLINDRICAL DIE ROLL BLANK, HAVING IN THE CYLINDRICAL PERIPHERY THEREOF A SERIES OF CAPSULE-FORMING CAVITIES, EACH CONSISTING OF A HARDENED-STEEL, RAISED-RIM, CAPSULE CAVITY INSERT FITTED INTO AN INSERT SLOT IN THE PERIPHERY OF SAID CYLINDRICAL ROLL AND HAVING AT LEAST ONE PISTON CYLINDER UNDER SAID INSERT, AT LEAST ONE CAPSULE EJECTOR PLUG EXTENDING TOWARDS THE INSERT CAVITY IN THE INSERT, SAID CAPSULE EJECTOR PLUG HAVING THEREON A CAPSULE EJECTOR PISTON, FITTING IN SAID CYLINDER, WHEREBY SAID PLUG MAY BE, BY AIR PRESSURE, RAISED TO SUBSTANTIALLY THE TOP OF SAID CAVITY, OR RETRACTED TO FORM A PORTION OF THE BOTTOM OF SAID CAVITY, A MANIFOLD PASSAGE FROM ADJACENT THE AXIAL END OF SAID CYLINDER TO AVALVE SURFACE OF SAID DIE ROLL BLANK, WHEREBY AIR PRESSURE, ACTING THROUGH ADJACENT VALVE MEANS AT DESIRED TIMES DURING THE ROTATION OF THE ROLL, CAUSES AN INCREASE OR REDUCTION IN THE PRESSURE IN SAID CYLINDER, THEREBY ACTUATING SAID PISTON AND PLUG; THE COMBINATION THEREWITH OF A SEPARATE CONTINUOUS HARDENED STEEL GUARD RING ON EACH SIDE OF THE PERIPHERY OF SAID CYLINDRICAL DIE ROLL BLANK AND CONCENTRIC WITH SAID DIE ROLL, AND OF A DIAMETER SUCH THAT THE GREATEST DIAMETER OF THE GUARD RING IS SUBSTANTIALLY THE SAME AS AND COAXIAL WITH THE DIAMETER OF THE FACE OF THE CUTTING OUT RIMS OF SAID INSERTS.