"MEHRWELLIGE, KONTINUIERLICH ARBEITENDE MISCH- UND KNETMASCHINE FUER PLASTIFIZIERBARE MASSEN MIT INEINANDERGREIFENDEN, GLEICHSINNIG DREHENDEN SCHNECKEN KONSTANTEN ACHSABSTANDES"

Multishafted, continuous mixing and kneading of plastifiable compounds using mutually engaging worm elements which rotate in the same sense, at a constant axial separation. Along the direction of advance, the worm elements have successive zones with different numbers of threads. Each zone with the smaller number of threads follows a zone with a larger number of threads. The worm elements mesh with one another in successive zones so that the worm element of one zone has a self-cleaning action upon one another, and the zone with the smaller number of threads has a housing with a larger interior bore and larger corresponding worms than the zone with the larger number of threads, so that, in the zone with the smaller number of threads, the free cross-section is larger than in the preceding zone. Both zones have fill openings that can be charged independently of one another.