Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Layered – stratified traversely of length – or multiphase...
Patent
1987-09-03
1989-06-13
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Layered, stratified traversely of length, or multiphase...
264 407, 4251311, 4251335, 425192R, 425462, B29C 4792
Patent
active
048391310
ABSTRACT:
The present invention provides a novel coextrusion apparatus that includes a first flow channel of a greater width than a second flow channel, and an adjustable vane blade between the channels. By the use of interchangeable plates, this unique apparatus is able to prevent any selected layer or layers of a laminate from extending to the full laminate width. This highly advantageous result is obtained by the formation of an isolating edge that is an integral part of a layer or layers that extend the full laminate width. Also provided is process for forming a laminate having an isolating edge.
REFERENCES:
patent: 3398431 (1968-08-01), Corbett
patent: 3583032 (1971-06-01), Stafford
patent: 4165210 (1979-08-01), Corbett
patent: 4197069 (1980-04-01), Cloeren
patent: 4289560 (1981-09-01), Simons
patent: 4731004 (1988-03-01), Wenz, Jr.
Kroboth Timothy R.
P.C.E. Corp.
Thurlow Jeffery
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