Apparatus for the production of multilayer film

Claim 1

AN EXTRUSION ADAPTOR PARTICULARLY SUITED TO BE INTERPOSED BETWEEN AT LEAST TWO SOURCES OF HEAT PLASTIFIED SYNTHETIC RESINOUS THERMOPLASTIC MATERIAL AND A SHEETING DIE, THE ADAPTOR COMPRISING A HOUSING DEFINING A POLYMER PASSAGEWAY HAVING AN INLET AND AN OUTLET, THE INLET ADAPTED TO COMMUNICATE WITH A FIRST SOURCE OF HEAT PLASTIFIED THERMOPLASTIC RESINOUS MATERIAL, THE OUTLET ADAPTED TO COMMUNICATE WITH A SHEETING DIE, THE HOUSING DEFINING AN INTERNAL GENERALLY ANNULAR PLENUM DISPOSED ABOUT THE POLYMER PASSAGEWAY, THE HOUSING DEFINING AN INTERNAL ANNULAR EXTRUSION ORIFICE PROVIDING COMMUNICATION BETWEEN THE POLYMER PASSAGEWAY AND THE ANNULAR PLENUM, THE HOUSING DEFINING A POLYMER SUPPLY PASSAGEWAY IN OPERATIVE COMMUNICATION WITH THE PLENUM, A BUSHING DISPOLSED WITHIN THE POLYMER PASSAGEWAY, THE BUSHING HAVING AN INLET OF GENERALLY CIRCULAR CONFIGURATION AND AT LEAST TWO OUTLETS OF GENERALLY ELONGATE CONFIGURATION, THE OUTLETS BEING DISPOSED INTERMEDIATE THE ANNULAR EXTRUSION ORIFICE AND THE OUTLET OF THE POLYMER PASSAGEWAY, A PORTION OF THE BUSHING, WHICH COMPRISES A DISCHARGE END, DEFINING AT LEAST TWO GENERALLY SPACED APART DISCHARGE MEMBERS DEFINING THE OUTLETS AND PROVIDING COMMUNICATION BETWEEN THE INLET END OF THE PASSAGEWAY AND THE OUTLET END OF THE PASSAGEWAY, THE BUSHING DEFINING A TRANSVERSE SLOT BETWEEN THE OUTLETS AND SO CONSTRUCTED AND ARRANGED SO AS TO PERMIT FLOW OF MATERIAL FROM THE ANNULAR EXTRUSION ORIFICE BETWEEN ELONGATE OUTLETS OF THE BUSHING.