A disc for use in a disc screen is disclosed that creates an “intended space”—i.e., the designed space through which material is intended to pass—that undulates in both directions in the plane defined by the screen's rotatable shafts. The disc design includes a major axis that is rotated along the length of the shaft, creating a helical ridge. The ridge is continuous and non-stepwise, thereby avoiding the “pinch” of the prior art designs. And by having the helical ridge of adjacent discs on the same shaft with opposing rotations, the lateral movement of material may alternate along the length of the shaft—further spreading the material throughout the width of the disc screen and increasing the screen's efficiency.

Helical Disc For Use In A Disc Screen

A shaft for a rotary star screen apparatus has a shaft body having a series of axially spaced star connectors and a series of stars, mounted to the star connectors. Each one of these stars has a plurality of circumferentially distributed star members each elongate in a direction having a component radially away from the shaft body. The star connectors each have a plurality of circumferentially distributed star member connectors. Each of these star members is a separate part, individually and detachably mounted to one of the star member connectors. An apparatus equipped with such shafts is also described.

Shaft for a rotary star screen conveyor rotor and rotary star screen conveyor including such shafts

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.

Roller Segment for Separating and Cleaning Devices of Root Crop Harvesters and Method for its Manufacture

A disc for a separating conveyor screen has a disc body with an opening in an axial direction for receiving a shaft. At least one anchoring member of the disc has an anchoring portion projecting into the opening in a radially inward direction and has a positioning portion fitted in a disc body of the disc. The anchoring portion has at least one projection in circumferential sense of the opening for anchoring in at least one recess in an outside surface of the shaft. At least one tensioner is provided for tensioning the anchoring member and the disc body radially towards each other. A separating conveyor screen equipped with such discs is also described.

Disc for a separating conveyor screen and separating conveyor screen including such a disc

An improved multi-disc assembly and method for releasable attachment to a shaft of a disc screen apparatus. A multi-disc hub includes multiple discs configured for use in a material separation screen of a disc screen apparatus, and has a through bore configured for direct engagement over the shaft of a material separation screen. The multi-disc hub is comprised of at least two parts that detach from each other, and at least one part comprises a portion of the through bore cross-sectional area that is less than or equal to half of the total through-bore cross-sectional area. A fastener is adapted to attach at least one hub part to the shaft, and the fastener provides a force that is greater than the force of gravity to temporarily retain the hub part onto the shaft when the shaft is rotated.

Device and method to attach disc to shaft

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Device and method to attach disc to shaft