The Hopper Feeder Machine feeds a weigh pan balanced at the end of a lever; such that when a pre-set quantity of fibre is dropped into the weigh pan, the hopper feeder stops, then the pan opens and drops the fibre on a moving lattice below. They are still used to blend fibers. The opportunity is often taken to stock- dye fibers. In such a case, the material then has to pass through squeeze rolls, a dryer, and an oiling section before further processing. The machine is made in a number of variants. The Hopper Feeder Machine is very durable.