Patent ID: 8191714

Claim:
A conveying and separating device for root crop, the device comprising: a separating stretch comprising at least two rotatingly driven separating rollers, wherein the separating stretch receives a harvested material comprising root crop and admixed parts and wherein the at least two separating rollers transport on a topside of the separating stretch primarily the root crop while the admixed parts are removed in a screening phase by means of a screening gap between the at least two separating rollers; wherein, by a direct forced cleaning action, the at least two separating rollers are kept free at least of admixed parts that can adhere to the at least two separating rollers; wherein the at least two separating rollers are roller bodies provided with circumferential entrainment profiles; wherein the roller bodies interact with one another in a paired arrangement and are driven in rotation to effect transport and separation of the mixture; wherein the roller bodies are spaced at a spacing from each other and the spacing defines a screening gap between the roller bodies of the paired arrangement; wherein the roller bodies interact to provide the forced cleaning action in the screening gap; at least one actuator acting on the roller bodies; wherein the roller bodies, in addition to being driven in rotation, are acted on by the at least one actuator to generate a radial phase adjustment of the roller bodies relative to each other in that one of the roller bodies is rotated about a pivot angle relative to the other roller body of the paired arrangement and/or an axial movement of the roller bodies relative to each other so that the entrainment profiles of the paired arrangement carry out an axial and/or radial displacement relative to each other and create at least one cleaning gap with adjustable shearing zones in the screening gap to effect the forced cleaning action.