(under the class definition) Apparatus wherein a member moves along and in close proximity to surface of a heat exchanger to mechanically dislodge from the surface material undergoing heat exchange.
SEE OR SEARCH CLASS
62, Refrigeration,
342+, for a congealed product producing means with means for working the congealed material, and subclass 354 for a congealed product producing means with a moving scraper.
159, Concentrating Evaporators,
33, for an open pan type concentrating evaporator with a rake means.
