A roller assembly for a screening device includes a shaft extending along a width direction, a pair of discs disposed on the shaft, and a spacing assembly disposed on the shaft between the pair of discs. The spacing assembly includes an inner spacer disposed around the shaft and an outer spacer disposed around the inner spacer. The outer spacer has a body defining an inner receiving space and a support element disposed in the inner receiving space. The body abuts against the discs and is formed of an elastically compressible material. The support element limits compression of the body along the width direction.

An object sorting system is presented which includes a hopper, a feeder, a roller pair, a pair of orientation flaps, an adjustable assembly, a first and second camera boxes and an ejection assembly. Feeder receives the shells from the hopper and feeds them uniformly over the gap between the rollers which guides and provides fixed orientation to the shells passing through them and conveys the shells which are relatively bigger than the gap between the rollers to one side of the pair of rollers towards the first collection chute by inclining the roller assembly in the range of 0 to 15 degrees towards the first collection chute. A pair of orientation flaps is placed parallel and exactly below the pair of rollers to avoid the deflection of shells caused immediately after passing through the roller gaps.

A method for cleaning of a roller screen transporting and screening particles by means of at least three rotating rollers. The rollers are installed in succession at given clearances and arranged transversally in relation to the transport direction of the particles to screen a desired range of particle sizes. At least one roller changes its circumferential velocity and/or its rotational direction over time at defined time intervals for defined time periods such that for this defined time period for at least one pair of neighbored rollers one roller has a higher circumferential velocity than the other and/or both rollers roll in opposite rotational directions.

A roller assembly for a screening device includes a shaft extending along a width direction, a pair of discs disposed on the shaft, and a spacing assembly disposed on the shaft between the pair of discs. The spacing assembly includes an inner spacer disposed around the shaft and an outer spacer disposed around the inner spacer. The outer spacer has a body defining an inner receiving space and a support element disposed in the inner receiving space. The body abuts against the discs and is formed of an elastically compressible material. The support element limits compression of the body along the width direction.

A sorting device for sorting out coins from bulk material, includes at least one sorting gap (5) for coins that is limited by at least one roller (2) which can be rotated by a drive (33) about an axis of rotation (A) such that objects that cannot be conveyed through the sorting gap (5) are applied with force by the roller (2) in a direction away from the sorting gap (5) wherein a discharge hood (6) is provided for an eddy current separator device (29), which has an adjustable trajectory separator unit (4) in a hood interior (7), wherein the at least one roller (2) is arranged in or on the discharge hood (6) in relation to the trajectory separator unit (4) such that a non-ferrous metal fraction separated from the bulk material by the trajectory separator unit (4) is guided in the direction of the sorting gap (5) by the weight force of the non-ferrous metal objects (12).

A disc for use in a disc screen is disclosed. The auger disc includes a central longitudinal disc axis and a hub extending a length along the longitudinal disc axis. The longitudinal disc axis is coaxial with the center of the hub. The hub further includes a hub surface and a helical ridge structure extending away from the hub surface and twisting about the longitudinal axis at least 360 degrees. The auger disc has a disc rotation axis that is parallel to the central longitudinal axis and is offset from the center of the hub. The auger disc is constructed to rotate about the disc rotation axis.

A workpiece handling system for inspection of workpieces having an elongated cylindrical segment with an enlarged feature such as a threaded fastener. A pair of rollers is inclined with respect to horizontal, and having cylindrical surfaces separated by a gap and rotated about parallel axes, with upwardly presented end surfaces. A drive arrangement rotates the rollers. A slide mechanism enables the rollers to be set at a first and second separation gaps. A workpiece transfer mechanism loads the workpiece onto the rollers, rotation of the rollers set at the first separation gap causes the workpieces to rotate. A sensor probe is positioned in close proximity to the workpiece head as the workpiece is rotated. A workpiece receiving system is provided for handling the workpieces when the rollers are set to the separation second gap, allowing the workpiece to fall under gravity between the rollers.

An object sorting system is presented which includes a hopper, a feeder, a roller pair, a pair of orientation flaps, an adjustable assembly, a first and second camera boxes and an ejection assembly. Feeder receives the shells from the hopper and feeds them uniformly over the gap between the rollers which guides and provides fixed orientation to the shells passing through them and conveys the shells which are relatively bigger than the gap between the rollers to one side of the pair of rollers towards the first collection chute by inclining the roller assembly in the range of 0 to 15 degrees towards the first collection chute. A pair of orientation flaps is placed parallel and exactly below the pair of rollers to avoid the deflection of shells caused immediately after passing through the roller gaps.

A disc for use in a disc screen is disclosed. The disc includes a longitudinal disc axis and a hub extending a length along the longitudinal disc axis. The hub further includes a hub surface and a helical ridge structure extending away from the hub surface and twisting about the longitudinal axis at least 360 degrees. A cross-section of the hub taken perpendicular to the longitudinal disc axis is non-circular.

A grizzly apparatus includes a plurality of grizzly bars arranged at predetermined intervals in a second direction perpendicular to a first direction which is an extension direction of center axes of the grizzly bars. Each of the plurality of grizzly bars is rotatable in a direction opposite to a direction of rotation of its adjacent grizzly bar so that a slit through which a screening target object passes and a gap through which the screening target object does not pass alternately emerge, between adjacent grizzly bars. The guide includes an outer member forming its outer shape, and has at least one guide surface inclined with respect to the second direction in such a way that the guide surface descends as the guide surface advances in the second direction toward the slit to guide the screening target object having fallen onto the guide to the slit.