Abstract: A flip-flow screener machine includes a carrier frame with primary, drive-induced vibration, to which a vibrating frame is coupled in a freely oscillating manner by means of elastic transmission elements and is excited and set to vibrate secondarily by the carrier frame via said transmission elements, transverse carriers being arranged on the carrier frame and on the vibrating frame, a transverse carrier on the vibrating frame lying downstream of a transverse carrier on said carrier frame, with a flexible screen bottom being arranged between two transverse carriers and detachably secured to said transverse carriers, each of the screen bottoms including at least one undercut portion by means of which they can engage behind an undercut on the transverse carrier, and two adjacent screen bottoms abutting one another directly at their front ends.

Abstract: A flip-flow screener machine includes a carrier frame with primary, drive-induced vibration, to which a vibrating frame is coupled in a freely oscillating manner by means of elastic transmission elements and is excited and set to vibrate secondarily by the carrier frame via said transmission elements, transverse carriers being arranged on the carrier frame and on the vibrating frame, a transverse carrier on the vibrating frame lying downstream of a transverse carrier on said carrier frame, with a flexible screen bottom being arranged between two transverse carriers and detachably secured to said transverse carriers, each of the screen bottoms including at least one undercut portion by means of which they can engage behind an undercut on the transverse carrier, and two adjacent screen bottoms abutting one another directly at their front ends.

Abstract: The invention relates to a sieving device provided with a sieving mat (2), which has sieving openings, and with beating elements (7), which are located underneath the sieving mat and which strike against the underside of the sieving mat (2) in order to free the sieving mat (2) from material to be sieved that is clogging the sieving openings. Said beating elements (7) are fastened to at least one elongated tensioned traction mechanism (5) such as a cable or band that extends underneath the sieving mat (2).

Abstract: A support beam has a flat elongated metallic bar having a vertically oriented wide width dimension and a horizontally oriented narrow thickness dimension, and a mass of plastic substantially completely surrounding the bar and forming an upwardly directed face adapted to bear on and support a sieve-panel rim and an upwardly projecting formation interfitting with the rim. The bar in accordance with the invention is oriented centrally underneath the formation and the mass forms a pair of coplanar and adjacent support faces flanking the formation and each adapted to support a respective sieve-panel rim.

Abstract: The invention relates to a sieving device provided with a sieving mat (2), which has sieving openings, and with beating elements (7), which are located underneath the sieving mat and which strike against the underside of the sieving mat (2) in order to free the sieving mat (2) from material to be sieved that is clogging the sieving openings. Said beating elements (7) are fastened to at least one elongated tensioned traction mechanism (5) such as a cable or band that extends underneath the sieving mat (2).