MULTISIEVE SCREEN WITH VARIABLE-LENGTH TRAJECTORIES OF PORTIONS OF SIFTING SURFACE Russian patent published in 1994 - IPC

FIELD: screening of friable materials. SUBSTANCE: screen comprises casing with sieves suspended on flexible ties secured to casing in pairs at loading and unloading sides. Unbalanced drive is mounted on casing at loading side. Casing with sieves has two downward-directed posts on the unloading side. Screen base has the form of horizontal frame with two pairs of posts. Posts on unloading side are shorter than those disposed on loading side. Flexible ties on loading side connect the ends of two base posts disposed on this side with the side portions of casing. Flexible ties disposed on unloading side are disposed below the horizontal plane passing through center of gravity of casing with sieves and connect free ends of two base posts with free ends of two posts secured on casing. EFFECT: improved design. 1 dwg