Abstract: A separating and cleaning device for a root crop harvester has at least one separating and cleaning stretch. In this separating and cleaning stretch, at least one roller is arranged that is assembled of one or several roller segments that in direction of a longitudinal roller axis are coaxially adjoining each other. These roller segments are provided with a jacket part made of an elastically yielding material and provided with entrainment ribs projecting outwardly. This jacket part interacts radially inwardly with a receiving area that is provided with free spaces delimited by intermediate webs as well as a through opening, wherein the receiving area can receive a polygonal shaft or drive element for torque transmission. The roller segments, beginning at their inner through opening, are provided with a multi-layer structure in radial outward direction.

Abstract: An aqueous composition comprising at least 18% surfactant and colloidal inorganic clay. This composition is stable with regard to phase separation at 40° C. for at least three months and exhibits increased low-shear viscosity relative to a composition without clay. The composition comprises at least one lipophilically-modified copolymer containing acrylic acid residues and C2–C4 alkyl (meth)acrylate residues.

Abstract: An aqueous composition comprising at least 18% surfactant and colloidal inorganic clay. This composition is stable with regard to phase separation at 40° C. for at least three months and exhibits increased low-shear viscosity relative to a composition without clay. The composition comprises at least one lipophilically-modified copolymer containing acrylic acid residues and C2-C4 alkyl (meth)acrylate residues.

Abstract: An apparatus for separating potatoes from other materials such as soil, clods, stones, herbage, etc., particularly for potato harvesting machines, has a number of roller bodies, which are disposed side by side with parallel axes, form revolving groups driven in pairs in opposite directions and jointly take in a separating segment, which extends from a charging end to a potato-discharging end. The roller bodies are aligned at right angles to the separating segment.

Abstract: The screen conveyor for root crop harvesters comprises an endless screen belt conveyor, which consists of at least two conveyor belts and transverse conveying rods fastened to the conveyor belts and rotates about deflection rollers, which are rotatably mounted in a housing and of which at least one group can be driven by a driving mechanism by coaxially disposed deflection rollers. For this purpose, at least one adjuster is provided, which can be shifted into position against the working half of the screen conveyor belt and specifies a changing course for the working half of the conveyor belt by forming a step.