Apparatus for forming cup-shaped members

Claim 1

AN APPARATUS FOR FORMING A CUP-SHAPED WORKPIECE COMPRISING THE COMBINATION OF A MOVABLE HOLLOW PUNCH MEANS AND A MOVABLE MANDREL MEANS, A STATIONARY PLATEN MEANS PROVIDED WITH A FORMING DIE AND DISPOSED INTERMEDIATE SAID PUNCH AND MANDREL MEANS, SAID PUNCH MEANS INCLUDING A REVERSE DRAWING DIE SURROUNDED BY SHAPING DIE MEMBER, BIASING MEANS CONNECTED TO THE REVERSE DRAWING DIE FOR NORMALLY EFFECTING ALIGNMENT OF THE FORWARD FREE ENDS OF THE DRAWING DIE AND SHAPING DIE MEMBER, WORKPIECE HOLDING ELEMENTS MOVABLE TOWARD AND AWAY FROM EACH OTHER AND ASSOCIATED WITH SAID DRAWING DIE AND SHAPING DIE MEMBER AND THE FORMING DIE OF SAID STATIONARY PLATEN MEANS, SAID ELEMENTS HAVING OPPOSED SURFACES INCLUDING CUTTING SURFACES WHICH COOPERATE UPON THE INITIAL AND CONTINUED ADVANCEMENT OF THE MOVABLE PUNCH MEANS RELATIVE TO THE FORMING DIE OF SAID STATIONARY PLATEN MEANS TO EFFECT THE CUTTING OF A FLAT WORKPIECE FROM A WEB OF MATERIAL INSERTED BETWEEN SAID OPPOSED SURFACES AND THEN TO HOLD THE WORKPIECE IN NON-FRICTIONAL RELATIONSHIP WITH RESPECT TO THE SHAPING DIE MEMBER AND FORMING DIE OF SAID STATIONARY PLATEN MEANS AS THE SAID SHAPING DIE MEMBER ADVANCES THE WORKPIECE THROUGH SAID FORMING DIE AND FORCES THE WORKPIECE TO ASSUME A CUPSHAPED CONFIGURATION, AND MEANS FOR ACTUATING SAID MOVABLE MANDREL MEANS WHEREBY SAID MANDREL MEANS CAN REVERSELY DRAW SAID CUP-SHAPED WORKPIECE BY DRAWING SAID CUP-SHAPED WORKPIECE IN SAID REVERSE DRAWING DIE OF SAID PUNCH MEANS AND SAID MANDREL MEANS BEING PROVIDED WITH A CUTTING RING MEANS WHICH COOPERATES WITH CERTAIN PORTIONS OF SAID STATIONARY PLATEN MEANS AND PUNCH MEANS TO TRIM THE PERIPHERAL EDGE OF THE REDRAWN CUP-SHAPED WORKPIECE UPON THE BOTTOMING OF SAID MANDREL MEANS IN SAID REVERSE DRAWING DIE OF SAID PUNCH MEANS.