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US 6,375,452 B1Granted
Sheet processing system
AssigneeWelex Incorporated
InventorFrank R. Nissel
Life of this patent
Estimating the term…
Abstract
A sheet processing system for continuously producing plastic sheet which is continuously supplied to an intermittent take-up device, utilizing a sheet forming apparatus, a conveyor, an accumulator and take-up apparatus, the sheet being fed along the conveyor to an accumulator positioned integrally with the conveyor, the accumulator being controlled in a cyclic operation which provides for the accumulation of the continuously fed sheet material to permit intermittent operation of the take-up apparatus, and the edge trimming of the sheet subsequently to the action of the accumulator.
Claims9
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.
4 more elements
Dependencies are inferred from the claim text.