Release mechanism for automatic molding machine

Claim 1

IN AN AUTOMATIC COMPRESSION MOLDING MACHINE, A MOLD HAVING AN UPPER CAVITATED PART AND A LOWER CLOSURE PART DEFINING A SHAPED CAVITY, MEANS FOR ENGAGING AND DISENGAGING THE LOWER MOLD WITH RESPECT TO THE UPPER MOLD, A THREADED CORE PIECE HAVING RECIPROCAL MOVEMENT IN SAID UPPER MOLD AND DEFINING THEREWITH AN ANNULAR PORTION OF SAID CAVITY, AN EJECTOR ROD ON WHICH SAID CORE PIECE IS MOUNTED, AN EMBOSSMENT MOUNTED ON SAID EJECTOR ROD AT A POINT REMOVED FROM SAID CORE PIECE, AND MEANS FOR IMPARTING RECIPROCAL AND SLIGHT ROTATIONAL MOVEMENT TO SAID EJECTOR ROD, SAID MEANS INCLUDING A RECIPROCALLY MOVING SLEEVE WITH A SPIRAL CHANNEL IN WHICH SAID EMBOSSMENT IS POSITIONED, SAID SPIRAL CHANNEL BEING OF A LENGTH AND PITCH TO IMPART FIRST A ROTATIVE FORCE TO SAID CORE PIECE TO BREAK LOOSE THE THREADS OF SAID CORE PIECE FROM A WORKPIECE POSITIONED IN THE MOLD CAVITY AND THEN AN EJECTOR FORCE TO BREAK THE WORKPIECE FREE FROM OTHER SURFACES OF SAID UPPER MOLD.