Feeding of aggregate silos, e.g. by conveying belts, bucket elevator, S-conveyor.
Feed hopper: to ensure that no grain misses the hopper, the grid can be (partly or entirely) passed over. It can be underground (for rear dump or side tipper) or overground for rear dump tipper (e.g. at high ground water level).
Distribution of the aggregates into the boxes is effected by a swivelling distribution chute or belt, or by reversible belts.