Screen frame for flat sifters - has cascade sifting action with numerous fall channels

摘要

The insert sieve (1) which has a geometrically regular shape is mounted inside the frame holder so that fall channels are formed between the frame and sieve. The sieve does does not contact the support strips (2) of the frame. Connecting webs (4) are mounted between the outer strips of the insert frame (3) and the support strips (2) of the frame holder and/or between the outer strips of the insert frame (3) and another connecting web (4) and/or between the support strips (2) of the frame holder and another connecting web (4). The connecting webs are pref set between the corners of the insert sieve and the support strips (2) of the frame holder and/or between the corners of the sieve and other connecting webs (4). The cross-sectional surface of all the fall channels (5) are preferably the same size. USE/ADVANTAGE - Greater variations are possible whereby 8 or 16 available guide channels are formed.