Lower frame for conveyor bands - includes flexible support rollers with one section having left threaded and remainder right threaded ribs

摘要

The lower frame for conveyor bands has flexible support rollers following each other in the direction of the conveyor band length. They are spiral shaped ribs as a base for the conveyor band. One section of the support rollers have left threaded and the remainder right threaded ribs which without any change in their threading extends over the whole length of the support rollers. The rollers are arranged so that a left threaded roller is followed by a right threaded one and the measurements of the ribs over the length of the support rollers do not change. The rollers exhibit a considerable degree of sag when supporting the conveyor band.