Abstract: Apparatus and method for degasifying a gas and solids containing flowable material includes an inlet for the flowable material and an outlet for gas separated from the flowable material. A fluidizing rotor has radially extending open blades and is disposed for driven rotation about its center for generating a degasifying centrifugal force and has a substantially disk-shaped radially extending back plate, the back plate has a front side and a rear side, a plurality of air passages defined in and through the back plate and through which gas separated from the flowable material travels from the front side to the rear side of the back plate for discharge through the outlet.

Abstract: A cutter segment for a disc grinder or the like, said grinder consisting of two oppositely placed cutters made up of several segments attached to each other, at least one of the cutters being rotatable, said cutter segments being provided with a rough surface or with teeth and grooves for the grinding of material such as wood chips. With prior-art grinders of this kind, exhaustion of the steam produced in the grinding process has proved to be a difficult problem. The cutter segment of the invention solves this problem in that the segments of at least one of the cutters are provided with one or more exhaust channels having a sectional area essentially larger than that of the grooves.