Patent ID: 9566720
Date: 2017-02-14
CPC Classifications: B01F,B02C,B29B,B29C,B29K,Y02W

Claim:
1. An apparatus for the pretreatment and subsequent conveying of thermoplastic waste, the apparatus comprising: a container configured to hold the thermoplastic waste to be pretreated; at least one mixing and/or comminution implement within the container, wherein the mixing and/or comminution implement is configured to pretreat the plastic material and comprises at least one blade configured to rotate around an axis of rotation, wherein the blade has a convex edge, and wherein pretreating the plastic material comprises at least one of mixing, heating, and comminuting the plastic material, wherein the container comprises an aperture through which the pretreated thermoplastic waste exits the container, wherein the aperture is formed in a side wall of the container adjacent to the mixing and/or comminution implement, at least one multiscrew conveyor configured to receive the pretreated thermoplastic waste through the aperture, the multiscrew conveyor comprising: wherein the imaginary continuation of the central longitudinal axis of the first screw is offset from the axis of rotation of the mixing and/or comminution implement at a point nearest the axis of rotation by an offset distance; and a motor configured to rotate the mixing and/or comminution implement, wherein the motor is structured to rotate the mixing and/or comminution implement such that the convex edge of the blade of the mixing and/or comminution implement leads during rotation, wherein the motor is structured to rotate in a direction which causes the motion of the convex edge to be described by a direction vector such that when the convex edge is nearest the aperture, the motion vector describing the motion of the convex edge nearest the aperture is either perpendicular to the conveying direction or has a vector component which has a direction opposite the conveying direction.