Apparatus for extruding foamed polypropylene sheet having...

Plastic article or earthenware shaping or treating: apparatus – Stock pressurizing means operably associated with downstream... – Including auxiliary shaping means associated with molding...

Reexamination Certificate

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Details

C425S133500, C425S190000, C425S465000, C425S466000

Reexamination Certificate

active

06926512

ABSTRACT:
A coat hanger extrusion die wherein the aperture of the die land widens along the extrusion axis of the die to the die exit opening, thereby forming an expansion zone.

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