The flour to be screened is first poured into the bowl and then transmitted into the screening chamber via a vertical conveying screw.
The flour is "sucked" from the bottom of the tank and passes between two brushes of silk, then spring sifted by the "spout" outlet.
With the machine on castors, it is possible to position it so that the sifted flour is automatically poured into the kneader or the mixer bowl.