Buffer tank which is dozing product using the belt conveyor. Product ex.: potatoes are poured into the bunker using hopper connected to the unit’s frame. And then taken out by the belt conveyor situated on the unit’s bottom. Above the conveyor, inside the bunker we can find device lowering product pressure on the belt. During the work the belt is cleanned by the rotating brush attached to the bottom. Hopper is equipped with the crossbeam to block different sieve products to fall out. We can regulate an amount of picked product using the special gate.