Molding machine

Claim 1

A MOLDING MACHINE COMPRISING A HEAD, MEANS TO SUPPORT A FLASK BELOW SAID HEAD, SAID HEAD HAVING A FLAT, DOWNWARDLY FACING, OUTER PERIPHERAL SURFACE THEREON, SPACED, DOWNWARDLY FACING SURFACES ON SAID HEAD INWARDLY DISPOSED OF SAID OUTER PERIPHERAL SURFACE, SAID DOWNWARDLY FACING SURFACES BEING DISPOSED IN SUBSTANTIALLY THE SAME PLANE AS SAID OUTER PERIPHERAL SURFACE, A HEAVY FLEXIBLE PAD ATTACHED TO SAID PERIPHERAL SURFACE AND TO SAID INWARDLY DISPOSED SURFACES, A RETAINER FRAME GENERALLY COEXTENSIVE WITH ALL SAID SURFACES RESTING ON SAID PAD AND ATTACHED TO SAID HEAD HOLDING SAID PAD TO SAID HEAD, SAID PAD DEFINING A PLURALITY OF CHAMBERS IN SAID HEAD, MENAS TO INJECT AIR UNDER PRESSURE INTO SAID HEAD BEHIND SAID PAD, SAID HEAD BEING SLIGHTLY SMALLER IN OUTSIDE DIMENSION THAN SAID FLASK, AND MEANS ON SAID MACHINE TO FORCE SAID HEAD INTO SAID FLASK WHEREBY SAID FRAME RIGIDLY COMPACTS SAND THEREIN ADJACENT THE PERIPHERAL EDGES THEREOF, SAID FRAME OVERLYING SAID INWARDLY DISPOSED SURFACES COMPACTING SAND INWARDLY FROM THE EDGES OF SAID FLASK WITH A POSITIVE FORCE, SAID PAD PACKING SAID SAND BETWEEN SAID FRAME EDGES, THE PARTS OF SAID HEAD SUPPORTING SAID INWARDLY DISPOSED SURFACES HAVING DOWNWARDLY FACING SLOTS THEREIN, SAID FLASK HAVING TRANSVERSELY EXTENDING BARS ATTACHED TO ITS SIDE EDGES AND EXTENDING ACROSS IT, SAID BARS BEING RECEIVED IN SAID SLOTS WHEN SAID HEAD IS FORCED INTO SAID FLASK TO COMPACT SAND THEREIN.