dies shape the co extruded melts to a desired shape application_number US 91133204 A description in the embodiment of fig1 a u2013 c a dual co extrusion setup 2 is used to extrude two simultaneous profiles not shown using one main extruder 3 and one co extruder 5 the dual co extrusion setup 2 comprises a u201c y u201d adapter 4 dual line co extrusion assembly 6 two spider pipe heads 8 and two adjustable profile dies 10 and is shown assembled in fig1 a u2013 c in the direction of flow path 12 the main extruder injects solid substrate into the u201c y u201d adapter 4 which divides the substrate into two separate flows in the direction of flow path 14 the co extruder injects capstock not shown into the co extrusion assembly 6 inside a co extrusion assembly 6 the capstock is divided into separate flows and the capstock and substrate of each flow are bonded together to form two separate flows of capstock coated substrate ccs each flow of ccs flows from the co extrusion assembly 6 into a separate spider pipe head 8 and into a respective adjustable profile die 10 the ccs enters the two 2 adjustable profile dies 10 in circular form and each adjustable profile die transforms the ccs into a desired cross sectional profile the extrusions exit the two adjustable profile dies 10 simultaneously in the direction of flow path 16 the adjustable profile dies are described in detail in application ser no 09 912 250 filed jul 24 2001 now u s pat no 6 769 899 which is incorporated by reference in its entirety fig2 a and b show the components of the co extrusion assembly 6 in one embodiment.