Abstract: A conveyor belt system includes a conveyor belt, a first roller, a second roller, wherein the conveyor belt extends between the first roller and the second roller so that the conveyor belt has a transport side and a return side; and a frame for positioning the conveyor belt, wherein the frame has at least two upright walls at the position of opposite transverse ends, which two upright walls are formed such that, at the position of the return side, the return side falls within the two upright walls and that, at the position of the transport side, the transport side protrudes to a position outside the upright walls on either sides.

Abstract: Conveyor belt system with a conveyor belt which extends between a first roller and a second roller so that the conveyor belt has a transport side and a return side, wherein the conveyor belt system further comprises a frame for positioning the conveyor belt, characterized in that the conveyor belt has an upright rib at the position of each of its two transverse ends, which upright ribs extend in the longitudinal direction over substantially the whole conveyor belt, wherein the frame has at the position of the two transverse ends and at least at the position of the transport side a groove in which the upright ribs are received.

Abstract: A conveyor belt system includes a frame with a conveyor belt driven by at least two rollers so that an upper belt functions as transport surface and a lower belt functions as return, wherein the frame has an upper segment extending substantially above the upper belt and a lower segment extending substantially under the upper belt, wherein the upper segment has at least two upper standing walls with a mutual spacing which, at least at the position of the upper belt, is smaller than the width of the conveyor belt, and wherein the lower segment has at least two lower standing walls with a mutual spacing which is greater than the width of the conveyor belt, wherein the upper belt is supported on either side by a plate extending respectively from below the upper belt to an outer side of the lower standing wall.