Extrusion of plastic sheeting or netting

Claim 1

IN APPARATUS FOR EXTRUDING PLASTIC NETTING OR SHEETING IN TUBULAR FORM COMPRISING, IN COMBINATION, COAXIAL, CIRCULAR, RELATIVELY ROTATING DIE MEMBERS HAVING CIRCUMFERENTIALLY DISPOSED DIE DISCHARGE ORIFICES AT ONE END THEREOF, AND COAXIAL SURFACES IN SLIDING CONTACT WITH ONE ANOTHER TO FORM A BEARING SLIDEWAY EXTENDING FROM SAID DIE ORIFICES TO THE OPPOSITE END OF SAID DIE MEMBERS, AND AXIALLY EXTENDING FEED DUCTS FORMED IN SAID DIE MEMBERS ADAPTED FOR THE PASSAGE OF PLASTIC UNDER PRESSURE FROM A SUPPLY CHAMBER TO SAID DIE ORIFICES; THE IMPROVEMENT WHICH COMPRISES THE PROVISION OF AN ANNULAR PASSAGE FORMED IN SAID SLIDEWAY ADJACENT SAID DIE ORIFICES AT RIGHT ANGLES TO THE AXIS OF SAID DIE MEMBERS AND IN COMMUNICATION WITH SAID FEED DUCTS, SAID PASSAGE SERVING AS AN INTERMEDIATE ANNULAR RESERVOIR FOR THE PLASTIC FED THROUGH THE FEED DUCTS FROM THE SUPPLY CHAMBER, AND BY REASON OF THE FRICTION OF THE WALLS OF THE ANNULAR PASSAGE THROUGH ROTATION OF THE DIE MEMBERS THE PLASTIC IN SAID RESERVOIR IS KEPT IN CIRCULATING, TURBULENT SMEARING MOTION, SAID FEED DUCTS TO ONE SIDE OF SAID ANNULAR PASSAGE BEING OUT OF ALIGNMENT WITH SAID DIE ORIFICES ON THE OTHER SIDE OF SAID ANNULAR PASSAGE WHEREBY TO PREVENT A STRAIGHT THROUGHWAY OF PLASTIC FROM THE SUPPLY CHAMBER TO SAID DIE ORIFICES.