Patent ID: 9242419
Filing Date: 2016-01-26
CPC Classification: B29C,B29D,B29L

Claim Text:
1. A method of using an extrusion die to extrude conduit that is divided into channels by at least one strip-shaped substrate embedded into the conduit, the method comprising the steps in order: feeding a strip-shaped substrate having longitudinal edges through a slot within the extrusion die; introducing a first polymeric material into the extrusion die at a first point and causing the polymeric material to move along a flow direction of the extrusion die towards an exit of the extrusion die forming opposing portions of polymeric material, wherein each opposing portion has a pair of distal edges, wherein the strip-shaped substrate and the polymeric material are separated from each other at the first point, wherein the distal edges of the opposing portions of polymeric material are separated by a pair of wings of the extrusion die, and wherein the slot and the strip-shaped substrate do not extend into the wings of the extrusion die; extending the slot and the strip-shaped substrate into the wings of the extrusion die such that the strip-shaped substrate extends past and between the distal edges of the opposing portions of polymeric material, wherein the strip-shaped substrate and the opposing portions of polymeric material are separated at this point; bringing the opposing portions of polymeric material in contact forming a first polymer layer such that the distal edges of polymeric material contact, adhere, and sandwich the strip-shaped substrate, wherein the strip-shaped substrate is embedded into the first polymer layer.