SCREEN FOR SIZING CONSTRUCTION MATERIALS Russian patent published in 2012 - IPC B07B1/28 

FIELD: process engineering.

SUBSTANCE: invention relates to screening rocks and construction materials, crushing and sorting jobs, and screen sizing of construction materials. Proposed screen comprises sieving surface, drive, loading and unloading appliances. Said sieving surface is arranged elastically on bed, furnished with vibrator and made up of torus with multistart screw perforated surface furnished with screw grooves inside and outside of sieving surface at angle to its axis provided with of polygonal pockets with four and more sides. Distance between straight crease edges equals the length of each element of said polygon. Note here that pockets along inner and outer sieving surface may differ in both shape and size. Said pockets are arranged along the edges of said surface made up of section. Every said section is composed of circular sector of perforated band coiled into ring with polygonal perforated surface to make different-size quadrangles with parallel sides. Note here that said sections are interconnected by their free sides representing hollow sieving surfaces.

EFFECT: smaller length, expanded operating performances.

9 dwg