Abstract: A tandem seal, according to the present invention, is provided for a conveyor roller having a drum body with opposing ends rotatably mounted on an axle by way of a bearing assembly within a flanged housing attached at either end of the drum body. The tandem seal has an end cap rigidly mounted within the flanged housing, extending radially inwardly towards the axle and spaced apart therefrom. A guard is rigidly mounted on the axle and extends radially outwardly from the axle and is spaced apart from the end cap. A first contact seal seals the space between the guard and the end cap and a second contact seal seals the space between the axle and the flanged housing.

Abstract: A floating conveyor belt cleaner assembly for removing residual material on the surface of a conveyor belt has a scraper assembly with a plurality of scraper blades rotatably mounted between mounting frames attached to the support structure of a conveyor belt adjacent the opposing edges of the belt. A rotating mechanism selectively rotates the scraper assembly relative to the mounting frames to position a new set of scraper blades against the conveyor belt once the worn set of scraper blades requires replacement. A float mechanism permits movement of the scraper assembly vertically substantially perpendicular to the surface of the belt as the scraper blades wear down.

Abstract: A return roller battery has a plurality of idler rollers rotatably attached at either end to opposing mounting plates. The mounting plates are rotatably attached to a conveyor belt frame and selectively rotated by a crank mechanism to position one of the idler rollers beneath the conveyor belt to support the belt. A locking mechanism secures the mounting plates against rotation when an idler roller is in position.