METHOD OF AND DEVICE FOR SEPARATION OF DOWN AND FEATHER MATERIALS Russian patent published in 1995 - IPC

FIELD: poultry husbandry. SUBSTANCE: method comes to delivery of material into working chamber, creating air stream entraining particles of separated material, sucking out of separated fraction from chamber and evacuating impurities from working chamber. Trajectory of intrachamber air stream is changed constantly relative to chamber walls. In process of separation counterflow of air is created through calibrated fractions and impurities and working chambers arranged inside housing. Working chambers are formed by belt and shields of endless conveyor adjoining housing walls. Air stream inlet and outlet holes are made in housing walls. Holes in one wall are displaced relative to holes in other wall. Outlet holes for air stream are calibrated. Device has arrangement to provide counterflow of air through calibrated holes made in form of diaphragm furnished with drive and arranged from outside relative to working chambers from side of housing wall with calibrated holes. EFFECT: enhanced quality of separation. 6 cl, 4 dwg