Method and apparatus for deep drawing of metals

Claim 1

IN A BLANK CUTTING AND DEEP DRAWING APPARATUS, AN ANNULAR MOVABLE DIE PART AND A CONCENTRIC PUNCH RIGIDLY SECURED THERETO, A PAIR OF CONCENTRIC ANNULAR STATIONARY DIE PARTS TO RECEIVE SAID MOVALBE DIE PART AND PUNCH, SAID MOVALBE DIE PARTS PRIOR TO ENTRY OF SAID PUNCH TO DRAW SATIONARY DIE PARTS PRIOR TO ENTRY OF SAID PUNCH TO DRAW A SHALLOW SHELL, AND SAID PUNCH BEING ARRANGED RELATIVE THE LEADING FACE OF SAID MOVALBE DIE PART TO THEREAFTER ENGAGE AND REVERSELY DRAW SAID SHELL OVER THE INNER OF SAID ANNULAR STATIONARY DIE PARTS WHILE SAID SHELL IS IN FRICTIONAL CONTACT WITH AND MOVES IN OPPOSITION TO THE MOVEMENT OF SAID MOVABLE DIE PART, THE STROKE OF SAID MOVABLE DIE PART AND PUNCH BEING OF A LENGTH SUFFICIENT TO CARRY SAID PUNCH INTO SAID STATIONARY DIE PARTS TO COMPLETE THE REVERSE DRAW OF SAID SHELL MEANS FOR OPERATING SAID MOVABLE DIE PART AND PUNCH IN UNISON THROUGHOUT THE DRAWING AND SUBSEQUENT REVERSE DRAWING OF SAID SHELL AND A BOTTOM-FORMING DIE ARRANGED WITHIN THE INNER OF SAID STATIONARY DIE PARTS AND URGED UNDER PRESSURE TO THE OUTER END THEREOF, SAID PUNCH ON ENTERING THE INNER OF SAID STATIONARY DIE PARTS BEING ADAPTED TO DISPLACE SAID BOTTOMFORMING DIE AGAINST ITS PRESSURE TO SIMULTANEOUSLY FORM THE BOTTOM OF THE SHELL AS IT IS BEING REVERSELY DRAWN.