Spinnerette closure for high pressure spinning of melt polymers

Claim 1

IN A SPINNERETTE ASSEMBLY ADAPTED FOR PRODUCING FILAMENTARY MATERIAL BY EXTRUSION IN THE FORM OF FILAMENTS OF A VISCOUS MOLTEN FIBER-FORMING COMPOSITION UNDER PRESSURE, THE COMBINATION OF A SPINNERETTE ADAPTER PROVIDED WITH A CENTRALLY DISPOSED INLET OR FEED CHANNEL FOR INTRODUCTION OF MOLTEN FIBER-FORMING COMPOSIITION AND HAVING AN INTERNAL CENTRALLY DISPOSED DISTRIBUTION CHAMBER THEREIN COMMUNICATING WITH SAID FEED CHANNEL, A CLAMP PLATE SECURED TO SAID ADAPTER AND HAVING AN OPENING THEREIN TO RECEIVE THE ADAPTER IN CLOSE FITTING BUT REMOVAL RELATIONSHIP THERETO, SAID CLAMP PLATE HAVING AN INTERNAL FLANGE ON THE INNER SURFACE OF WHICH IS DISPOSED A PERFORATED SPINNERETTE PLATE, A FILTER SCREEN SUPERIMPOSED ON SAID SPINNERETTE PLATE AND MEANS FOR CONNECTING A HIGH PRESSURE SUPPLY OF MOLTEN FIBER-FORMING COMPOSITION TO SAID ADAPTER, SAID CLAMP HAVING DISPOSED AROUND ITS INNER PERIPHERY AND IN CENTERED RELATION ALONG THE PARTING LINE BETWEEN THE SPINNERETTE ADAPTER AND THE CLAMP PLATE A PLURALITY OF THREADED SEMI-CIRCULAR OPENINGS ADAPTED TO RECEIVE THREADED SECURING PINS, A SERIES OF CORRESPONDING SEMI-CIRCULAR UNTHREADED OPENINGS IN THE SPINNERETTE HOLDER OF THE SAME DIAMETER AS SAID FIRST MENTIONED CIRCULAR OPENINGS AND ALSO ADAPTED TO RECEIVE SAID SECURING PINS, SAID SECURING PINS BEING THREADED INTO THE THREADED SEMI-CIRCULAR OPENINGS IN THE CLAMP PLATE TO SECURE SAID ADAPTER, CLAMP PLATE, FILTER AND SPINNERETTE TOGETHER BUT BEING FREELY MOVABLE ALONG THE SURFACES OF THE UNTHREADED OPENINGS IN THE SPINNERETTE ADAPTER, SAID SECURING PINS, UPON APPLICATION OF INTERNAL PRESSURE TO THE DISTRIBUTION CHAMBER OF THE SPINNERETTE ADAPTER THROUGH THE MEDIUM OF THE MOLTEN FIBER-FORMING COMPOSITION, BEING UNDER COMPRESSION, WHEREBY LEAKAGE OF FIBER-FORMING COMPOSITION FROM THE ASSEMBLY IS PREVENTED.