A Overhead conveyor having a track of parallel tubular rollers set at a definite grade, usually on antifriction bearings, at fixed locations, over which package goods which are sufficiently rigid to prevent sagging between rollers are moved by gravity or propulsion.
A belt over roller conveyor is a multi-type conveyor utilizing both rollers and a belt. They are mostly used in industries which are in need of transporting light to medium weight loads and in either inclines or declines.
The belt is either supported by a slider bed or by return rollers located under the loader rollers. Belt over roller models can provide control of orientation and placement of loads, which is helpful for bulky, irregular shaped products.