Abstract: A materials processing machine, in particular, a mill, a sifter or a rotary-vane feeder, having at least one articulated connection for movably holding at least one movable machine part on a stationary machine part. In order to achieve a simplified operation, in particular, when the machine is arranged in an isolator, the articulated connection contains a first pivoting arm that is movably coupled to the stationary machine part and at least one additional pivoting arm that is coupled in a pivoting fashion to the first pivoting arm and serves for holding the movable machine part.

Abstract: A particle classifier and in particular a particle classifier wheel where the blades are made entirely of a wear-resistant material such as sintered corundum. The blades extend between two discs and are mounted therebetween to have some axial play. The ends of the blades fit into annular grooves formed in the two discs and rubbery-elastic inserts are provided to hold the blades in place.