A novel tube construction is provided for use in an auger feeder conveyor. The tube comprises a bi-edged tube sheet curved in a mediate portion to form a tube of substantially circular cross-sectional aspect. A portion adjacent a first sheet edge extends substantially radially outwardly to form a male flange. A portion adjacent a second sheet edge has a first element which extends substantially radially outwardly. That portion is reversely turned to provide a second flange element extending radially inwardly. The first and second elements thus form a female flange into which the male flange fits. In this way, a tube seam is formed which maintains the tube sheet in its cross-sectional aspect. A bell and spigot arrangement can be provided for interconnecting tube sections. Several ways are offered for arranging the tube sections in a progressively angularly offset array to encourage desired feed distribution action.
