FIELD: civil engineering. SUBSTANCE: installed in staggered order on transverse walls of hopper are deflecting plates. The last plate is disposed directly above outlet portion of housing. Side edges of a slot provided under housing in hopper bottom are connected by inclined plates with longitudinal walls. Vertical plates installed in the rear part of hopper bottom form a gap corresponding to projection of housing on hopper bottom. Deflecting plates may be spring-loaded and installed on transverse walls by means of axles. EFFECT: improved design. 2 cl, 3 dwg
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