Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Layered – stratified traversely of length – or multiphase...
Reexamination Certificate
2011-03-01
2011-03-01
Daniels, Matthew J. (Department: 1791)
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Layered, stratified traversely of length, or multiphase...
C264S515000, C264S514000, C425S313000
Reexamination Certificate
active
07897081
ABSTRACT:
Methods for coextruding a predetermined initial melt stream through at least one profiled die having a nonlinear inlet opening and an outlet opening. The die insert is positioned so as to cause redistribution of at least a portion of the melt stream. The nonlinear melt stream formed at the nonlinear inlet opening converges within the die insert into a substantially more linear or rectangular melt stream at the die insert outlet opening. At the die insert outlet opening at least one or more regions of the melt stream vary in properties or material clue to the redistribution of the melt stream in the die insert. Articles extruded using the coextrusion methods are also described.
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Ausen Ronald W.
Seth Jayshree
Venne Janet A.
3M Innovative Properties Company
Bond William J.
Cohen Jodi
Daniels Matthew J.
Gross Kathleen B.
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