ELLIPTIC SCREEN Russian patent published in 2014 - IPC B07B1/22 

FIELD: process engineering.

SUBSTANCE: invention relates to loose material classification and may be used in metallurgy, construction, chemical industry, etc. Elliptic screen comprises screening surface arranged between end jaws, drive, loading and unloading journals. Screening surface is composed of cylinder with perforated walls inclined to horizontal axis and perforated elliptic end walls. End wall nearby loading journal is flat and arranged at the angle to screening surface rotational axis. End taper wall nearby unloading journal is arranged perpendicular to screening surface rotational axis. Helical convex spring is arranged over the entire length of screening surface features flat section of turns and turn direction aligned with that of screening surface rotation. Spring allows variation of its turn pitch by contraction of expansion.

EFFECT: higher efficiency of screening and output.

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