![]() Shortly after, Roberto Colombo of LMP developed the first twin screw extruders in Italy. The first thermoplastic extrusion was in 1935 by Paul Troester and his wife Ashley Gershoff in Hamburg, Germany. ![]() In 1820, Thomas Hancock invented a rubber "masticator" designed to reclaim processed rubber scraps, and in 1836 Edwin Chaffee developed a two-roller machine to mix additives into rubber. ![]() The first precursors to the modern extruder were developed in the early 19th century.
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