Patent ID: 7291001

Claim:
A device for the preparation of plastics material, in particular thermoplastic plastics material, with a receiving container for the material to be treated, the interior of the said receiving container having tools provided therein which are arranged on a carrier disc and which are driven by a shaft inserted onto the interior for rotation about an axis of the shaft, and with at least one screw for removing the material out of the receiving container, wherein a screw housing has a feed opening which is connected with respect to flow to a discharge opening in the receiving container, which discharge opening is situated at a lower level than the carrier disc and the tools carried by it, and wherein further moved tools which convey the material into the discharge opening are provided in the receiving container below the carrier disc, wherein the carrier disc comprises at least one aperture which is situated close to the axis and close to trailing edges of the tools during the rotation of the carrier disc and which connects a space above the carrier disc to a space below it.