(under subclass 478) Dispenses in which the openings at the ends remote from the supply container (usually the ends of tubular spouts) terminate adjacent each other. One is usually the dispensing outlet and the other a vent to be closed by accumulation of material in an unclaimed trap or independent container.
SEE OR SEARCH THIS CLASS, SUBCLASS:
353, for movable, barometric trap chambers.
437, for nonmovable, barometric trap chambers with means to vary the volume trapped.
457, for miscellaneous barometric trap chambers, and see the Notes thereto, for related art.
SEE OR SEARCH CLASS
141, Fluent Material Handling, With Receiver or Receiver Coacting Means, 295+, especially subclass 308, for multiple passage filling means for diverse flows.
