Patent ID: 6375452
Filing Date: 2002-04-23
Classification: B29C,B29L,B65H

Abstract:
A plastic sheet extrusion system comprising:(a) a sheet extrusion die, (b) extruder means connected to feed plastic material continuously in a downstream direction to and through said die to form a plastic sheet, (c) at least one cooling system comprising at least one cooling roll adjacent said sheet extrusion die and connected to conduct and cool said plastic sheet from said sheet extrusion die, (d) a roller conveyor having a sheet carrying surface extending downstream of said cooling system and connected to receive said sheet from said cooling system, said conveyor extending substantially horizontally or inclined to the horizontal, (e) an accumulator comprising a moveable roller forming said sheet into at least one extendible and contractable accumulator loop extending substantially vertically or inclined to the vertical and said accumulator being integral with said roller conveyor, (f) a set of mechanically driven pull rolls downstream of said accumulator, and (g) an edge trimmer on said conveyor downstream of said accumulator.