Patent ID: 7241128

Claim:
Roller adjustment apparatus for an extrusion mill, in particular a pellet mill, comprising a cylindrical die with radially extending extrusion channels and a number of rollers within the die, rotatable about their axes and co-operating with the die to press material to be treated through the extrusion channels in the die wall, with driving means to rotate the die and the axes of the rollers relative to each other about the axis of the die, said adjustment apparatus comprising eccentrically journalled bearing shafts for mounting the rollers, said eccentrically journalling of the shafts providing a radial adjustment of the position of the rollers relative to the die by rotation of the eccentrically journalled shafts, characterized by the rotational adjustment of the eccentrically journalled shafts being provided by means of extension arms fixedly mounted on the ends of the eccentrically journalled shafts, said extension arms being connected to an axially movable connection element by means of articulated connected linkage rods, and said connection element being connected to a rod provided with its axis in the axis of the die and extending to a position outside the material flow of the extrusion mill to move the connection element in the direction of the axis of the die, said axial movement being provided manually or by means of a suitable actuator connected to the rod.