Trommel screen unit
AssigneeIrathane Systems Incorporated
InventorsWilliam J. Valeri, Daniel O. Burkes
Life of this patent
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Abstract
The trommel screen unit includes a screen panel of polyurethane having embedded therein a plurality of longitudinal and transverse fiberglass rods. Marginal portions of the polyurethane panel overlie and are bonded to a rectangular steel frame, the sides of the frame having longitudinally spaced notches which receive therein the end portions of the transverse rod.
Claims23
A screen unit comprising a screen panel of elastomeric material, rigid means extending along opposite sides of said screen panel, and a plurality of plastic reinforcing rods contained in spaced portions of said panel and having therein portions overlying portions of said rigid means toward one side of said panel and free to move relative to said rigid means when said rods are flexed by material engaging said one side of the panel.
In a rotating trommel including intersecting beams forming generally rectangular openings therebetween, a screen unit for each of said openings having an inwardly directed surface against which material to be sifted contacts as said trommel rotates, each screen unit comprising a screen panel of elastomeric material, a frame including a rigid longitudinal bracket extending along each side of said panel and a transverse member extending across each end, a plurality of resilient reinforcing rods extending between said brackets, the end portions of said rods overlying inwardly directed portions of said rigid brackets, and means for clamping said brackets to a pair of said beams to hold the screen unit in place in said trommel.
Dependencies are inferred from the claim text.