(under subclass 108) Subject matter wherein a sieve is provided at or adjacent the inlet* to separate or reduce coarse lumps of load material.
SEE OR SEARCH CLASS
209, Classifying, Separating, and Assorting Solids,
21+, for operations of separating and grading or sorting solids employing both sifting and gaseous suspension; and subclasses 233+ for sifters in general. See especially subclasses 243+ for sifters combined with means for feeding solids to the same.