Abstract: An apparatus for opening and cleaning fiber tufts, includes an opening roll, a feeding mechanism for advancing the fiber tufts to the opening roll; a screen disposed along one part of the circumferential surface of the opening roll and located downstream of the feeding mechanism, as viewed in the direction of rotation of the opening roll. The screen permits impurities, propelled by centrifugal forces, to pass therethrough. The screen is eccentric with respect to the opening roll. There is further provided a shroud disposed along one part of the circumferential surface of the opening roll and located downstream of the screen. The shroud is movably supported for assuming an open position in which fiber tufts may pass from an annular clearance between the opening roll and the screen to an outlet and a closed position in which passage of the fiber tufts is blocked from the clearance to the outlet.

Abstract: A device for cleaning textile fiber flocks, comprising a conveyor band of a material that is penetrable by air, means for continuously feeding textile fiber flocks onto the upper run of the conveyor band and means for sucking air from below through the upper run when covered by a layer of the flocks, and a rotatable roller having elastically flexible leaves that protrude freely in radial directions and are substantially parallel to the axis of the roller, in proximity of the delivery end of the conveyor band and running in the same direction in which the upper band run moves, at such a high speed that the circumferential speed of the ends of the leaves is somewhat greater than that of the band, the roller being arranged in such a manner that the ends of the leaves strike, during their rotation, a point of the conveyor band that is not supported. A gap or interstice is provided between the roller and the conveyor band. The invention also provides optional, additional features for the cleaning device.