摘要 |
A vibrating screen device has a screen assembly and a basket. The screen assembly comprises a plurality of screens disposed within the vibrating screen device. The plurality of screens are constructed and arranged in a stepped down configuration such that each screen that is arranged below an adjacent screen in a stepped down configuration is at least partially overlapped by the adjacent screen arranged above. Each screen has a middle portion and a perimeter portion. The middle portion is porous, and the perimeter portion is substantially thicker than the middle portion.
|