Apparatus for molding hollow plastic articles

Claim 1

APPARATUS FOR MOLDING HOLLOW ARTICLES TO PLASTIC MATERIAL, COMPRISING AN OPEN BOX-LIKE FRAME HAVING VERTICAL SIDE AND REAR WALLS; TRANSVERSE GUIDE RODS MOUNTED ON SAID SIDE WALLS; GENERALLY PARALLEL PLATES EACH HAVING AN INNER PORTION CARRIED BY SAID RODS ON SPHERICAL BEARINGS, AND AN OUTER PORTION EXTENDING FORWARDLY IN FRONT OF THE FRONT EDGES OF SAID SIDE WALLS; PLATENS MOUNTED ON THE INNER SIDES OF SUCH OUTER PORTIONS OF THE PLATES FOR LIMITED MOVEMENT ABOUT VERTICAL BEARINGS; A MOLD INCLUDING HALF-PARTS MOUNTED ON THE INNER SIDES OF SAID PLATENS TO PROVIDE AT LEAST ONE MOLD CAVITY WHEN CLOSED; AND MEANS INSIDE SAID BOX-LIKE FRAME FOR OPENING AND CLOSING SAID MOLD BY MOVING SAID PLATES TOWARD AND AWAY FROM EACH OTHER ON SAID RODS, COMPRISING A TOGGLE INCLUDING A CRANK HAVING ARMS EXTENDING IN OPPOSITE DIRECTIONS FROM EACH OTHER, LINKS CONNECTING SAID ARMS TO SAID PLATES, A MOTOR HAVING A HORIZONTAL ARMATURE CONNECTED TO THE CENTER OF SAID CRANK, AND ADJUSTABLE STOPS MOUNTED ON SAID REAR WALL IN THE PATH OF SAID PLATES FOR LOCKING SAID TOGGLE TO SECURE THE MOLD PARTS TOGETHER IN CLOSED RELATIONSHIP.