Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Layered – stratified traversely of length – or multiphase...
Patent
1991-09-16
1992-08-25
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Layered, stratified traversely of length, or multiphase...
264 401, 264 407, 4251311, 4251335, 425462, 425141, B29C 4706, B29C 4792
Patent
active
051416913
ABSTRACT:
A feedblock is provided for producing a laminated plastic sheet with each layer of the laminated sheet being of substantially uniform thickness. The feedblock includes a plurality of lamella channels each of which is of non-rectangular cross-sectional shape. The particular non-rectangular cross-sectional shape of each lamella channel is selected to offset the tendency of the extruded plastic to thin and spread non-uniformly. Thus, the thinning and spreading of the extruded plastic will urge the plastic into a layer of substantially uniform thickness.
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Champion International Corporation
Sommer Evelyn M.
Thurlow Jeffery
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