Die arrangement

Claim 1

IN A BLANKING DIE FOR BLANKING A SHEET METAL MEMBER SO THAT AT LEAST ONE OF THE CUT FACES IS PERFECTLY SMOOTH AND NORMAL TO THE MAIN FACES OF THE SHEET METAL, IN COMBINATION, A DIE MEMBER HAVING AN END FACE AND BEING FORMED WITH A DIE CAVITY OF A PREDETERMINED CORSS SECTIONAL AREA EXTENDING FROM SAID END FACE INTO SAID DIE MEMBER AND DEFINING IN THE REGION OF SAID END FACE A PERIPHERAL CUTTING EDGE; A PUNCH MEMBER SPACED FROM SAID DIE MEMBER AND HAVING A CROSS SECTIONAL AREA SLIGHTLY SMALLER THAN SAID PREDETERMINED CROSS SECTIONAL AREA OF SAID DIE CAVITY AND HAVING AT AN END FACE THEREOF FACING SAID END FACE OF SAID DIE MEMBER, A PERIPHERAL CUTTING EDGE CONGRUENT TO SAID CUTTING EDGE OF SAID DIE MEMBER, SAID DIE MEMBER BEING MOVABLE TOWARD SAID PUNCH MEMBER SO THAT SAID PUNCH MEMBER MAY ENTER SAID DIE CAVITY SLIGHTLY INWARDLY SPACED FROM SAID CAVITY TO CUT A SHEET METAL MEMBER LOCATED BETWEEN SAID END FACES; AN ANNULAR PROJECTION HAVING IN A PLANE EXTENDING IN DIRECTION OF MOVEMENT OF SAID MOVABLE MEMBER A TRAINGULAR CROSS SECTION AND EXTENDING ALONG THE CUTTING EDGE OF SAID DIE MEMBER AWAY FROM SAID END FACE THEREOF AND HAVING A FREE EDGE SUBSTANTIALLY EQUIDISTANT FROM SAID CUTTING EDGE THEREOF AND SPACED FURTHER FROM THE PUNCH MEMBER THAN THE CLEARANCE BETWEEN SAID PUNCH MEMBER AND SAID DIE CAVITY, SAID FREE EDGE OF SAID PROJECTION BEING SPACED IN DIRECTION OF MOVEMENT OF SAID DIE MEMBER FURTHER FROM SAID END FACE OF SAID DIE MEMBER THAN IS SAID CUTTING EDGE THEREOF; AND A PRESSURE PAD ARRANGED ABOUT SAID PUNCH MEMBER AND HAVING AN END FACE LOCATED IN A REST POSITION, WHEN SAID DIE IS OPEN, SUBSTANTIALLY FLUSH WITH SAID END FACE OF SAID PUNCH MEMBER AND SAID PRESSURE PAD BEING MOVABLE AWAY FROM SAID REST POSITION THEREOF IN THE DIRECTION OF MOVEMENT OF SAID DIE MEMBER DURING CLOSING OF SAID DIE WHEN SAID FREE EDGE OF SAID PROJECTION ENGAGES A SHEET METAL MEMBER RESTING ON SAID END FACE OF SAID PRESSURE PAD.