Abstract: This invention relates to an idler. More specifically, the invention relates to any type of tracking idlers or pulleys (also known as trainer idlers or pulleys) typically used in the application of conveyors for the purposes of guiding a travelling conveyor belt to follow a central path. The idler, for guiding a travelling conveyor belt to that the belt follows a central path, includes a support axle (14), a steering roller (12), a pivot means and a castellated formation of alternating ridges (20) and grooves (22) having specific ranges of amongst other, groove width to enable portions of the conveyor belt to sag there into for the purposes of increasing the steering action of the idler on the conveyor belt.

Abstract: A tracking assembly for tracking belts and webs comprises a support frame which is adapted to be mounted below a traveling belt or web. A straight or angled support shaft is pivotally mounted at its center via a post which is rotatable within bush on the support frame. A selected arc of rotation of the post within the bush is determined by an adjustable limit stop arrangement which can take the form of a pair of grub screws. A roller is mounted onto each end of the shaft. The two rollers have tapered ends. When the belt or web travels off center it will come into contact with the tapered end of the roller on the side to which the belt has moved. This will cause the shaft to pivot about a vertical axis of the post and thereby steer the belt back to a central position.

Abstract: A training idler for guiding a travelling conveyor belt so that the belt follows a central path. The training idler includes an axle adapted to be mounted to a conveyor support frame, a steering roller rotatably mounted on the axle and adapted to be aligned generally transverse to a conveyor belt which will ride thereon, and a pivot connecting the roller to the axle, the pivot defining a generally perpendicular pivot axis about which the steering roller is able to pivot. The steering roller has an outer peripheral surface of generally right circular cylindrical form and has a central region and opposite edge regions, the edge regions having a peripheral circumference which is either greater than or less than the peripheral circumference of the central region.