Sticky transported material accumulates on regular roller sleeves and causes strong belt banking. Molded rubber disc rolls placed on the rollers prevent this from happening. With complex systems, it is often necessary to give more support to belt edges. This can be done by adding a molded disc rolls at each end. The non-abrasive molded rubber disc rolls are flush fitted to the roller and kept in position by steel spacers fixed at the ends with stop rings. Rollers with molded disc rolls positioned at specific distances can be supplied on request.