Feed Screws, Multiple Patents

5267788	Multi-screw, continuous mixing and kneading machine with polygonal kneading elements for plasticizable compounds
5499870	Multiscrew, continuous mixing machine for plasticizable compounds
5779451	Power efficient multi-stage twin screw pump
4911558	Screw conveyor
5873654	Twin screw extruder type batch mixers
4900156	Twin screw extruder with thread-free mixing zones
4875847	Twin-screw extruder having respective conical nose screw sections