String doffer mechanism

摘要

A mechanism for removal of contaminants from a stream of material has a plurality of rotatable hollow cylindrical doffer elements (11) each having flights (12) supplied with cleaning means (13) thereon mounted substantially parallel to one another within a frame (10). The doffer elements are each mounted on blocks (22, 24; 26, 28) on the frame. The blocks are provided with a number of mounting holes (23) whereby the vertical elevation of the doffer elements (11) with respect to the frame may be varied. The blocks are mounted to the frame by T-shaped bolts (37) the heads of which are slidable in a T-shaped groove (27) on the frame whereby the position of each doffer element on the frame may be adjusted.