Patent ID: 6357577
Filing Date: 2002-03-19
Classification: B65G

Abstract:
A conveyor device (2), comprising a casing (20) with an outlet (23, 28) at an upper end and an inlet (22) at a lower end, wherein the conveyor device (2) has substantially vertical orientation; and two shaftless spirals (21, 23) are disposed in parallel with one another within the casing (20) of the conveyor device (2), said conveyors being laterally spaced from one another to provide a space therebetween, said casing extending around said conveyors and including wedge-shaped portions projecting into said space between said conveyors to provide friction with the material being conveyed in a region between the conveyors, wherein the spirals (21, 31) rotate in opposite directions and the casing (20) has a polygonal cross-sectional configuration with straight sides and a plurality of corners.