PASS SCREEN Russian patent published in 2012 - IPC B07B1/22 

FIELD: process engineering.

SUBSTANCE: invention relates to screening rocks and construction materials, crushing and sorting jobs, and screen sizing of construction materials. Pass screen comprises sieving surface, drive, loading and unloading devices. Sieving surface is composed of sections made from eight, ten, twelve, etc number of equilateral triangles interconnected by their lateral sides. Note here said sections are interconnected by free third sides to make screw drum. Four, five, six and more zigzag right and left screw lines are arranged along perimeter of said drum. Four, five, six and more equal-pitch screw grooves facing each other are made on said drum.

EFFECT: expanded performances and higher efficiency.

8 dwg