Die assembly for making tau-head nails

Claim 1

IN A MACHINE FOR MAKING T-HEAD NAILS FROM A CONTINUOUS LENGTH OF WIRE HAVING A HEAD WIDTH EQUAL TO THE DIAMETER OF ITS SHANK, TWO GRIPPING DIES MOVABLE TRANSVERSELY TOWARD AND AWAY FROM EACH OTHER, A HAMMER DIE MOVABLE LONGITUDINALLY TOWARD THE GRIPPING DIES, AND TWO CUTTER DIES MOUNTED ADJACENT SAID GRIPPING DIES AT THE HAMMER DIE END THEREOF, SAID CUTTER DIES BEING MOVABLE TRANSVERSELY TOWARD AND AWAY FROM EACH OTHER, SAID HAMMER DIE BEING MOVABLE FROM A POSITION REMOTE FROM SAID CUTTER DIES TO A POSITION WITHIN SAID GRIPPING DIES, THE ADJACENT FACE OF EACH GRIPPING DIE HAVING A LONGITUDINAL GROOVE THEREON OVER A PORTION OF ITS LENGTH AND TERMINATING A DISTANCE FROM THE HAMMER DIE END THEREOF A DISTANCE GREATER THAN THE THICKNESS OF THE NAIL HEAD, THE PORTION OF EACH OF SAID ADJACENT DIE FACES ON THE END ADJACENT SAID HAMMER DIE BEING RECESSED FOR A DEPTH SUBSTANTIALLY EQUAL TO THE DEPTH OF SAID GROOVE AND ALONG SAID FACE FOR SUCH A DISTANCE AS TO PERMIT FREE METAL FLOW ALONG SAID FACE WHEN THE WIRE IS UPSET BY SAID HAMMER DIE, SAID GRIPPING DIES WHEN IN THEIR INWARD POSITION FORMING A T-SHAPED CAVITY WITH THE HEAD OF THE T-SHAPED CAVITY HAVING A LENGTH ON EACH SIDE OF THE LEG GREATER THAN THE CORRESPONDING LENGTH OF THE NAIL HEAD, SAID HAMMER DIE HAVING A GUIDE PORTION AND A HAMMER PORTION, SAID GUIDE PORTION EXTENDING BEYOND SAID HAMMER PORTION TOWARD SAID GRIPPING DIES AND HAVING A CROSS SECTION INCREASING FROM THE GRIPPING DIE END THEREOF TO A MAXIMUM WIDTH SUBSTANTIALLY EQUAL TO THE WIDTH OF SAID CAVITY, SAID HAMMER PORTION HAVING A TRANSVERSE FLAT SURFACE AT LEAST AS LONG AS THE HEAD OF SAID NAIL, SAID FLAT SURFACE BEING IN A PLANE PARALLEL TO THE PATH OF MOVEMENT OF SAID DIES, SAID CONTINUOUS LENGTH OF WIRE BEING FED LONGITUDINALLY TOWARD SAID GRIPPING DIES FROM THE END OPPOSITE SAID HAMMER DIE, SAID GRIPPING DIES BEING ADAPTED TO GRIP THE WIRE THEREBETWEEN IN SAID LONGITUDINAL GROOVES AND SAID CUTTER DIES BEING ADAPTED TO SEVER THE GRIPPED WIRE AT THE HAMMER DIE END OF THE GRIPPING DIES PRIOR TO LONGITUDINAL MOVEMENT OF SAID HAMMER DIE WHEREBY MOVEMENT OF SAID HAMMER DIE INTO SAID CAVITY WILL FORM THE HEAD OF SAID NAIL.