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1. Context
The co-mixer is a special extruder, invented in 1945 by Heinz List and initially marketed by the Swiss company Buss AG. The co-mixer is in fact composed of two extrusion units (figure 1 ): the co-mixer itself, the preferred mixing tool, and a recovery unit, usually a single-screw extruder, designed to smooth the pulsating flow due to the oscillating movement of the co-mixer screw (see § 2.1.1
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BUSS AG Hohenrainstrasse 10, 4133 Pratteln, Switzerland
B&P Littleford 1000 Hess Avenue, Saginaw, Michigan 48601, United States
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