IRREGULAR SHAPE POROUS MATERIAL PLANSIFTER VIBRATING SCREEN Russian patent published in 2008 - IPC B07B1/12 B07B1/46 

FIELD: engines and pumps.

SUBSTANCE: irregular shape porous material plansifter vibrating screen incorporates a casing, a vibration exciter, a grid plate made up of several rectangular metal sheets rigidly interconnected and forming a band with through slots. The said screen is furnished with a loading device with the grid screen arranged on the said band at the material feed start and a frame arranged below the band and coupled with the casing by shock-absorbers. The 2 to 5 mm-thick grid metal sheets are arranged below the casing. The said sheets are butt-jointed so as to allow the slots to get aligned along the material feed, the slots getting wider along the material feed direction to obtain varying grain sizes. The aforesaid casing represents two channels tied together on the both sides and comprises two shock-absorbers mounted on outer side surfaces.

EFFECT: higher efficiency, improved separation in various grain size fractions and lower screen blocking by porous material.

9 cl, 3 dwg, 2 ex