STRING SCREEN Russian patent published in 2015 - IPC B07B1/00 

FIELD: mining.

SUBSTANCE: invention relates to screening and classification of loose materials, mainly, rock heaps. Claimed device comprises feed hopper and sieving surfaces arranged one above the other in tiers. Every tier is coupled with intake hopper. Note here that said feed hopper and every sieving tier can displace in side guides of the screen front wall located at the preset angle to horizontal line. Every sieving tier of the screen bottom part can displace over lateral edges of horizontal guides articulated to interact with intake hoppers. Said side walls of intake hoppers are composed by two halves overlapped and provided with the insert of resilient material. Side edges of every sieving tier, apart from the lower one, are provided with angle-pieces to displace there over. Transverse strings are secured at said angle-pieces and located above the lengthwise strings. Transverse strings accommodate agitators to run them unobstructed. The uppermost sieving surface features the maximum width between the strings. Every other sieving surface features the width between the strings. Screen front wall location angle exceeds the classified material natural slope angle.

EFFECT: higher efficiency of classification.

3 cl, 5 dwg