A method and apparatus for separation and cleaning of fibers for papermaking machines for the removal of reject material such as tramp iron and knots, delivering a flow of fibers with mixed reject material and releasing the flow to descend gravitationally downwardly, splitting the flow into plural streams and deflecting the streams with an adjustable panel to control the angle, directing jets of air across the descending streams so that heavier reject materials falls downwardly and the fibers are carried laterally outwardly of each of the streams with a plate at the base of the streams adjustable to vary the zones for the rejects and for the acceptable fibers.
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