Die-casting machine with bell crank drive

Claim 1

A DIE-CASTING MACHINE FOR THE WORKING OF THERMOPLASTIC ARTIFICIAL MATERIAL COMPRISING A FRAME, A CRANK-DRIVE INCLUDING A CONNECTING ROD MOUNTED IN SAID FRAME, TWO PAIRS OF BELL-CRANKS OF DIFFERENT LENGTHS PIVOTALLY CONNECTED AT A CENTER PIVOT WITH THE FREE END OF SAID CONNECTING ROD, SAID CRANK DRIVE CONSTITUTING THE SOLE DRIVE FOR THE CLOSING AND OPENING MOVEMENT OF A MOLD AS WELL AS FOR THE WORKING STROKE AND THE RETURN STROKE OF A FEEDINGPISTON, A CROSS-TRAVERSE PIVOTALLY CONNECTED WITH THE LONGER ONE OF SAID PAIRS OF BELL-CRANKS, TWO LONGEROUS CONNECTED BY SAID CROSS-TRAVERSE AND CARRYING A MOLD CARRYING PLATE, A PISTON CARRIER PLATE HAVING A PISTON RECIPROCATING THEREIN AND PIVOTED TO THE SHORTER OF SAID PAIRS OF BELL-CRANKS, A PRESSURE PILLOW BUILT INTO SAID PISTON CARRIER PLATE AND RETARDING THE AXIAL MOVEMENT OF SAID PISTON, SO THAT THE DIE-CASTING MOLD IS RIGIDLY LOCKED, PRIOR TO THE TERMINATION OF THE MOVEMENT OF SAID PISTON, ALL THREE BEARINGS OF SAID PAIRS OF BELL-CRANKS ARE MOVABLY DISPOSED RELATIVE TO SAID DRIVE, AND AT THE START OF THE MOLD-CLOSING MOVEMENT THE DRIVING CONNECTING ROD AND THE LONGER OF SAID PAIRS OF BELLCRANKS BEING DISPOSED SUBSTANTIALLY IN THE SAE DIRECTION AND EXERTING A PUSHING PRESSURE UPON THE LARGER OF SAID PAIRS OF BELL-CRANKS, WHILE AT THE START OF THHE MOLD OPENING MOVEMENT SAID DRIVING CONNECTING ROD AND THE SHORTER OF SAID PAIRS OF BELL-CRANKS BEING DISPOSED SUBSTANTIALLY IN THE SAME DIRECTION AND EXERTING A DRAWING EFFECT UPON THE SHORTER OF SAID PAIRS OF BELL-CRANKS.