(under subclass 52) Automatic control means applied to dispensers having either or both (1) means to jacket the material conveying conduits, or (2) means to provide a nonmaterial discharging inert atmosphere for the material to be dispensed, including means to evacuate gases from the container.
(1) Note. The inert atmosphere may be chemically inert, i.e., not reactive chemically with the material, or it may be one which is not combustible with vapors given off by the material.
SEE OR SEARCH THIS CLASS, SUBCLASS:
61, for automatic controls for a fluid pressure medium which causes material discharge, even though such fluid pressure medium provides an inert atmosphere.
152, for the means provided for in this subclass (53) without automatic control.
190, for means to humidify a dispenser receptacle or means to absorb moisture from its atmosphere.
195, 209, 258, 261-263, 334, 373, 389, 394+, and 630+, for fluid flow discharge, gas agitation, or fluid pressure mediums causing discharge by acting on pumps, followers, etc., or by acting directly on material, even though the fluids used for such purposes are inert to the material being dispensed. SEE OR SEARCH CLASS
169, Fire Extinguishers, for means to provide inert atmosphere to smother or prevent starting of fires, particularly
66+,.
422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing,
42+, for preserving processes involving providing a protective layer.
