Abstract: A conveyor belt cleaner system comprising a plurality of scrapers for contacting and cleaning a conveyor belt includes an adjustable, internal torsion assembly that avoids external springs. A scraper assembly comprises an elongated, generally tubular torque arm of square cross section having an integral, upwardly projecting flange that mounts the scrapers. The torque arm is mounted for rotation radially toward or away from the conveyor belt between suitable brackets. Internal Z-shaped torsion springs extend generally from the brackets to the torque arm interior. The springs yieldably bias the scraper assembly against the conveyor belt. One leg of the Z-shaped springs is torsionally locked within the torque arm between opposed corners, and the opposite end terminates in a drive key projecting from the brackets. Preferably a ratchet system is employed to lock the torque arm in a desired tension. A variety of different scraper blade shapes and configurations can be used.

Abstract: A vibrating screen separator comprising a tuned suspension system for controlling a sifting screen and a resiliently isolated vibrator drive system for efficiently vibrating the screen cloth. The separator may be configured with stacked decks and serially connected sections involving multiple cooperating sifting planes. A rigid frame inclined above a supportive surface suspends the cloth for sifting material. The cloth is tensioned between frame sides by mounting rails, and it overlies a reinforcing subframe. The rails are tensioned by eye nuts externally accessible at the sides of the frame. Material gravitationally flows over the vibrating screen towards the discharge end. The cloth is shaken by an elongated, center strip aligned with the direction of material travel. The center strip is oscillated by the vibrator drive system disposed above it, which is coupled thereto by linkage.

Abstract: Opposing rotationally adjustable vibration motors mounted externally to opposite side walls of a rectangular or circular separator greatly facilitates access to the motors for servicing and/or replacement and enables varying the intensity of vibration of the separator screen over a wide range while motor speed remains constant. Simplicity of construction, compactness and ruggedness of motor mountings is achieved.

Abstract: A self-centering idler assembly is disclosed for a troughing conveyor belt. The idler assembly comprises a support frame and a gravity influenced pendulum cradle rocking supported on the frame for pivotable movement about a generally horizontal axis. A pair of rollers is rotatably mounted to the pendulum cradle along inclined axes above the horizontal axis. So constructed, bidirectional movements of a troughing conveyor belt supported upon the pair of rollers cause the cradle and inclined rollers to swing and bidirectionally train the belt.