(under subclass 379) Devices movable in contact with sifting elements to wipe the surfaces thereof to remove material that clogs the sifting passages, which are not classifiable in subclasses indented hereunder.
(1) Note. This subclass does not include devices whose function is to agitate the material as a whole on the sifting element with merely incidental clearing of the sifting passages.
(2) Note. The preceding subclasses which include sifters and agitators should be searched.
SEE OR SEARCH CLASS
55, Gas Separation,
296+, for devices such as wipers or brushes having relative traversing motion with respect to the separator to clear it of residue and see other related subjects in subclasses 282+.
171, Unearthing Plants or Buried Objects, 12, 13, 25, 43, 87, 89, and 114 for cleaners which movable cooperate with a reticulated separating surface to clear such surface or recovered objects thereon of undesired adhering dirt, vegetation or like material.
