SCREENING MACHINE Russian patent published in 1995 - IPC

FIELD: agriculture and grain-processing industry. SUBSTANCE: when cellular cylinder 1 with cells 17 and through central holes is rotated in stationary cylinder 2 coaxial to cellular cylinder 4 with a gap, the separation of the initial thrashed heap into long grain, short grain, short impurities, small particles and aspiration referrals takes place. The long grain comes off the cellular cylinder. The narrower short and light grains and the short impurities get into the cells as cylinder 21 terminating in frustum 22. Sticking through the central hole by the air streams from the fan through main air duct 14, air duct 13, converging tube 12 and window 3 in cylinder 2 in the cells in the space between rollers 5 and 6, they are combed out by brush roller 7 onto worm 9 into chute 8 whose lower edge is placed opposite to the upper part of window 3. The small particles from the cellular cylinder through the window to the cells go out into the space gathering onto worm 11 in the form of sheathing 10. The aspiration referrals are removed out of the space through window 3 and branch pipe 16. EFFECT: enhanced efficiency. 1 cl, 5 dwg