Abstract: A mill for grinding farinaceous seeds into flour comprises a pair of counterrotating cylinders to which seeds to be ground are fed from a hopper with the aid of a transport roller driven by a variable-speed motor. A sensor inside the hopper measures, e.g. capacitively, the level of a supply of seeds present therein and controls the speed of that motor to vary the feed rate substantially in proportion to the measured level. When the sensor detects a drop of that level below a minimum threshold, it stops the transport roller and causes the cylinders to be separated from each other.

Abstract: A mill for grinding farinaceous seeds into flour comprises a pair of counterrotating cylinders to which seeds to be ground are fed from a hopper with the aid of a transport roller. A float inside the hopper detects the level of a supply of seeds present therein and, via a pneumatic controller, varies the position of a curved cover plate confronting the transport roller in order to change the width of the intervening gap in conformity with the seed level. When the float descends to a minimum level, the gap is closed completely and the cylinders, arrested together with the transport roller, are separated from each other.