Press structure for tear open can lid die

Claim 1

THE COMBINATION, IN A PRESS: OF A PRESS FRAME INCLUDING A HEAD, A BED, AND UPRIGHTS, A PRESS PLATEN, GIB MEANS GUIDING THE PRESS PLATEN IN SLIDING MOVEMENT ON SAID UPRIGHTS, A CRANKSHAFT ROTATABLE IN THE HEAD, CONNECTING ROD MEANS CONNECTING THE CRANKSHAFT WITH THE PLATEN, SHAFT MEANS IN THE BED FOR CONNECTION TO INDEXABLE ELEMENTS OF A DIE SET, DRIVE MEANS CARRIED BY THE BED CONNECTED TO SAID SHAFT MEANS FOR INDEXING THE SHAFT MEANS, AND A DRIVE SHAFT CONNECTED AT ONE END TO SAID CRANKSHAFT AND AT THE OTHER END TO SAID DRIVE MEANS FOR ACTUATING SAID SHAFT MEANS IN TIMED RELATION TO THE ROTATION OF THE CRANKSHAFT, A DISC ON THE CRANKSHAFT AND HAVING APERTURE MEANS THEREIN SPACED RADIALLY FROM THE CENTER OF ROTATION OF THE DISC, A LIGHT SOURCE ON ONE SIDE OF THE DISC THE SAME RADIAL DISTANCE FROM THE CENTER OF ROTATION OF SAID DISC AS SAID APERTURE MEANS, AND A PHOTOCELL ON THE OTHER SIDE OF THE DISC AXIALLY ALIGNED WITH THE LIGHT SOURCE WHEREBY THE PHOTOCELL IS ILLUMINATED BY THE LIGHT SOURCE IN CONFORMITY WITH THE ANGULAR POSITION OF THE CRANKSHAFT TO PROVIDE SIGNAL MEANS FOR COMPARISON WITH SIGNAL MEANS DEVELOPED BY SAID INDEXABLE MEANS IN CONFORMITY WITH THE POSITION THEREOF FOR CHECKING THE POSITION OF SAID INDEXABLE MEANS RELATIVE TO THE POSITION OF SAID CRANKSHAFT DURING CONTINUED ROTATION OF THE CRANKSHAFT.