Patents
United States Patent 4776784
Douris , ê et al. October 11, 1988
Extruder
Batiuk October 11, 1988
Abstract
A mixing apparatus for mixing thermoplastic compounds wherein the mixing body has a pair of parallel chambers with a pair of rotors rotatably journaled therein. Such mixer has at least one bore communicating the parallel chambers with atmosphere to vent gases from the central bore. A rotatable screw is mounted in the bore which upon rotation continuously feeds the mixed thermoplastic material back into the chambers but allows the gases generated to be vented out of such bore.
Feed Screws
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