Die

Claim 1

A TUBING DIE CONSISTING ESSENTIALLY OF A BODY PORTION, A PLURALITY OF DIE PLATES, EACH OF THE DIE PLATES DEFINING A GENERALLY CENTRALLY DISPOSED APERTURE, EACH OF THE DIE PLATES BEING ADAPTED TO INTERFIT WITH ONE ANOTHER AND BE MAINTAINED IN SEALING RELATIONSHIP, THE ADJACENT DIE PLATES HAVING GENERALLY ANNULAR RECESSES DISPOSED ADJACENT THE CENTRAL OPENING, THE ANNULAR RECESSES IN ADJACENT DIE PLATES DEFINING A GENERALLY ANNULAR PLENUM AND A GENERALLY ANNULAR PASSAGE EXTENDING BETWEEN THE ANNULAR PLENUM AND THE CENTRALLY DISPOSED APERTURES, A TERMINAL DIE PLATE DISPOSED REMOTE FROM THE BODY PORTION HAVING DEFINED THEREN AN APERTURE COAXIAL WITH THE APERTURES OF THE DIE PLATES, A FIXED MANDREL DISPOSED WITHIN THE PAERTURES OF THE TERMINAL DIE PLATE AND THE DIE PALTES SO POSITIONED SO AS TO DEFINE AN ANNULAR EXTRUSION ORIFICE IN COOPERATION WITH THE TERMINAL DIE PLATE, THE DIE PLATES AND DIE BODY FORMING A PLURALITY OF PASSAGEWAYS EXTENDING THROUGH THE DIE PLATES AND COMMUNICATING WITH SELECTED PLENUMS.