Rhein-Nadel Automation RNA BUW Belt Hoppers are particularly suitable for the storage of medium and large workpieces and are used, for example, within a feeding system for the filling of vibratory conveyors (circular conveyors). The use of hopper systems enables the user on the one hand to increase the autonomy time of a feeding system and on the other hand to be able to design the filling of subsequent systems ergonomically. Another advantage of using hopper systems is the metered filling of downstream equipment. Belt hoppers are characterized by a closed trough into which no thin-walled workpieces or chips (for example through joints) can penetrate.