Abstract: Sprocket wheels for use in chain conveyors, for instance, are preferably of a divisible construction so as to enable each wheel to be removed from the shaft separately. Also, on the basis of considerations of hygiene, the outer side surface of such a wheel is preferably entirely flat when used in the food or beverage industry. Existing divisible wheels are either flat on the outside, but expensive, or not flat and cheap because they are made by injection molding. The synthetic sprocket wheel according to the invention is flat and cheap and comprises two wheel halves with axial planes abutting against each other, each wheel half consisting of two interconnected parts, made by injection molding, abutting against each other through a radial side face, with the cavities and ribs necessarily present for the injection molding process being located in the interior of the wheel half.

Abstract: A bend segment for a chain conveyor having a substantially U-shaped plastics element. The legs (2,3) of the U-shaped element form the rails over which the chain can move. The chain contains links (4) each having a substantially rectangular bearing surface and a connection system (5,6) located below the bearing surface. The successive links are pivotally coupled to each other through the connection systems. The links are composed of at least partly of a magnetizable material. Permanent magnets (8',8") are arranged at least in the connecting portion (12) between the legs of the U-shaped element. The permanent magnets (8) are arranged in chambers, closed at the top, formed in the bottom surface (1) of the U-shaped plastics element. The chambers and the magnets (8) extend in the bottom on opposite sides of the connecting portion over a substantial part of the width of the legs (2,3) of the U-shaped element.