Patent ID: 7309224

Claim:
A device for the preparation of plastics material for recycling purposes, in particular thermoplastic plastics material, comprising a container into which the material to be processed is fed from above through an inlet opening, and at least one mixing and/or comminuting tool arranged in the container and rotating about the vertical axis of the container, wherein the material treated by this tool is fed through an outlet opening which is arranged at the bottom of the container and to which the feed opening of a screw housing is fluidly connected, the screw housing being tangentially connected to the container, and wherein a side wall of the feed opening at which the tool discharges, seen in section, defines a widening of the feed opening, the widening extending continuously towards the axis of the screw housing, wherein this widening seen in the direction of the axis of the housing of two or more screws, extends over part of the circumference of the turns of the adjacent screws so that the screw-side edge of this widening forms an uninterrupted shearing edge co-operating with these screw turns.