Patent ID: 7347615

Claim:
A feed mixer comprising: a mixing chamber having a bottom and a discharge opening for a mix; a mixing screw in the mixing chamber and driven about a vertical rotational axis, the mixing screw including at least one flight that has a leading edge arranged adjacent to the chamber bottom, and the flight being dimensioned to have its greatest distance to the rotational axis at the leading edge, and tapers upwardly, and a rotary driven device for smoothing the discharge of the mix in the lower section of the mixing screw assigned to the discharge opening, the device containing at least two guide plates equally spaced around the rotational axis to increase the action of the centrifugal force in the mix; each guide plate having a leading take-up edge, a trailing edge, and an upwardly facing deposition surface for the mix having a radially outer boundary with a circumferential length and a distance to the rotational axis; the trailing edge of one of the guide plates is fixedly attached to the leading edge of the flight; wherein the distance of the boundary of each deposition surface to the rotational axis is essentially equal along its circumferential length in rotating direction, and is greater than the greatest distance of the flight to the rotational axis; and wherein said guide plate deposition surface comprises a greater width in the direction of rotation in an outer region radially with regard to said rotational axis than in a radially inner region.