Werner & Pfleiderer Gmbh

Coperion Gmbh

Zahnraderfabrik Renk Ag

Ralf Davids

Heinrich Arndt

Erich Pollak-Banda

Ralf Riehle

Raimund Schleicher

Hilmar Jussen

Louis Kummel

Rudolf Morhart

Erwin Bauer

Carsten Koberg

Gerhard Gotz

A material processing plant consists of a first screw-type machine and a second screw-type machine: The screw-type machines are connected to each other by means of a pipe elbow. An elongation compensation device is disposed between the first screw-type machine and the pipe elbow. An expansion compensation device for thermal expansion of the second screw-type machine is disposed inside the last column of the first screw-type machine which is arranged upstream of the pipe elbow.

Screw-type processing plant with elongation and expansion compensation devices

A driving gear assembly for a double helix extruder. The assembly includes a multiple power path from a transmission gear to produce synchronism in the extruder helix shafts. The structure of the gearing enables a simple adjustment of the proper mesh of the extruder helices when mounting the gearing by mere disengagement and re-engagement of a (normally not disengageable) tooth coupling.

Power distribution gearing for double helix extruders

Growing community of inventors

Illingen, Germany

Ralf Davids