Perforating device

Claim 1

A PERFORATING PUNCH AND DIE ASSEMBLY, COMPRISING IN COMBINATION: A PAIR OF C-SHAPED SHEET METAL PLATES DISPOSED IN SPACED SIDE-BY-SIDE FIXED RELATION TO EACH OTHER, AND EACH HAVING AN INTEGRAL UPPER ARM AND AN INTEGRAL LOWER ARM; A SEPARATE FLAT TABLE MEMBER SUPPORTED AT ITS LOWER SURFACE BY THE UPPER EDGES OF THE LOWER ARMS, AND HAVING AN UPWARDLY DIRECTED WORKPIECE-SUPPORTING SURFACE; A SEPARATE DIE-SUPPORTING PLATE HAVING A LOWER SURFACE COPLANAR WITH THE LOWER SURFACE OF SAID TABLE MEMBER AND RIGIDLY SECURED TO AND SUPPORTED AT ITS LOWER SURFACE BY THE UPPER EDGES OF THE LOWER ARMS CENTRALLY OF SAID SUPPORTING SURFACE, AND HAVING AN UPPER SURFACE SUBSTANTIALLY COPLANAR WITH SAID SUPPORTING SURFACE; A DIE ELEMENT ADJUSTABLY THREADED INTO SAID SEPARATE DIE-SUPPORTING PLATE AND HAVING A LOWER END EXTENDING BETWEEN AND BELOW THE UPPER EDGES OF THE LOWER ARMS; MEANS COACTING BETWEEN THE THREADS OF SAID DIE AND SAID LOWER SURFACE OF SAID DIE-SUPPORTING PLATE AND LOCKING THE ANGULAR AND AXIAL POSITION OF SAID DIE ELEMENT THEREIN; THE UPPER ARMS OF SAID C-SHAPED PLATES EACH EXTENDING OVER SAID SUPPORTING SURFACE TO A POINT ABOVE SAID DIE-SUPPORTING PLATE; A PUNCH; MEANS FIXEDLY CARRIED BY SAID UPPER ARMS AND DEFINING A BORE FOR SLIDABLY GUIDING SAID PUNCH IN A POSITION TO COOPERATE WITH SAID DIE ELEMENT; AND A MANUALLY OPERATED LINKAGE CARRIED BY SAID UPPER ARMS AND HAVING DRIVING CONNECTION WITH SAID PUNCH FOR RECIPROCATING THE SAME.