Multiple-layered sheeting apparatus

Details Multiple-layered sheeting apparatus Multiple-layered sheeting apparatus

1983-04-15

1984-11-20

Thurlow, Jeffery

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

Extrusion shaping means

264171, 4251335, 425146, 425376A, 425462, 425466, B29F 304

Patent

active

044836694

ABSTRACT:
Disclosed is a process and apparatus for extrusion of multiple-layer sheeting comprising an improved co-extrusion feedblock and valve plate for laying down co-extruded resin streams onto a main extruded polymeric resin. The new design provides advantageous external control of the layer number as well as a more refined control of layer thicknesses.

REFERENCES:
patent: 3756758 (1973-09-01), Prall
patent: 3833704 (1974-09-01), Nissel
patent: 3918865 (1975-11-01), Nissel
patent: 3924990 (1975-12-01), Schrenk
patent: 3968196 (1976-07-01), Wiley
patent: 4094947 (1978-06-01), Alfrey, Jr. et al.
patent: 4100237 (1978-07-01), Wiley
patent: 4144011 (1979-03-01), Sponaugle
patent: 4165210 (1979-08-01), Corbett
patent: 4208175 (1980-06-01), Rosenbaum
patent: 4249875 (1981-02-01), Hart et al.
patent: 4336012 (1982-06-01), Koch et al.

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