SCREEN SIEVE Russian patent published in 1998 - IPC

FIELD: metallurgy and other industries; grading of materials. SUBSTANCE: screen sieve has supports with fastening members-plate projections in the form of trapezium plates pointed with larger base upwards, flexible screening surface with cavities following the shape of support projections and aligned with the latter. Height of projections is less than depth of cavities, and thickness of cavities exceeds thickness of screening surface by value not less than difference between depth of cavities and height of projections. EFFECT: enlarged operating capabilities. 2 cl, 2 dwg