Screening apparatus
AssigneePowerscreen Limited
InventorLee Mallaghan
Life of this patent
Estimating the term…
Abstract
A screening apparatus comprising a rectangular screening frame and a multiplicity of parallel wires which are tensioned across the screening frame has a plurality of support bars with guide slots in order to support additionally each wire. The support bars are axially rotatably and interchangeably secured to the screening frame thus allowing to use the same screening frame for different string assemblies with different distances between the wires. If guide slots for different wire spacings are provided at different sides of a support bar, the same frame and the same support bars can be used for different string assemblies. The arrangement according to the invention allows an easy and rapid change of string assemblies on the same screening frame.
Claims11
A screening apparatus comprising a rectangular screening frame, a multiplicity of parallel laterally spaced wires releasably fixed to and tensioned between two oppositely disposed frame ends so as to extend across the screening frame, a plurality of support bars extending between side members of the frame and transversely with respect to the wires, said support bars having spaced guide slots releasably receiving and guiding the individual tensioned wires but otherwise not connected with or contacting said wires, said wires contacting only part of the peripheral surfaces of said support bars, and releasable fixing means releasably securing said support bars to said screening frame so as to permit removal and replacement of one or more of said support bars without disassembling said screening frame.
A screening apparatus comprising a rectangular screening frame, a multiplicity of parallel laterally spaced wires fixed to and tensioned between two oppositely disposed tensioning means so as to extend across the screening frame, a plurality of support bars extending between side members of the frame and transversely with respect to the wires, said support bars having spaced guide slots releasably receiving and guiding the individual tensioned wires but otherwise not connected with said wires, said wires contacting only part of the peripheral surfaces of said support bars, and means mounting said support bars for rotational adjustment about their longitudinal axes so as to bring different surface portions thereof into engagement with said wires and into exposure to material fed onto the screen surface.
Dependencies are inferred from the claim text.