Abstract: A chain conveyor is described, which comprises a track including at least one bend zone and a conveyor chain. The track comprises two spaced parallel rails over which the chain can move. The chain has links presenting a substantially rectangular carrying surface made of synthetic plastics material and a connecting system situated below the carrying surface and including hinge eyes on opposite sides of each link and a hinge pin of ferromagnetic material passed through the hinge eyes of each pair of adjacent links, thereby hinging adjacent links together. The chain is capable of flexing not only about the hinge pins but also in the plane of transport defined by the carrying surfaces of the successive links. Guide surfaces depend from the underside of the carrying surfaces for guiding the chain laterally relative to the rails. The maximum perpendicular distance between these guide surfaces is shorter than the minimum perpendicular distance between the guide surfaces formed on the rails.

Abstract: A sprocket-wheel, gear-wheel or like wheel, substantially manufactured of a synthetic material, comprising a hub which is divided along a plane which lies perpendicular to the center line of the hub-boring, said hub parts being provided with adjacent recesses for jointly accommodating a toothed ring member and being affixed to one another by bolts or the like to clamp the toothed ring member therebetween.