(under subclass 425) Dispensers having plural discharge outlets from a single trap chamber.
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424, for arrangements for returning material from the trap chamber to the source of supply, usually through a separate outlet. The material returned may be over-fill material or merely unused.
443, for arrangements for discharging material from the supply without its passing through the trap chamber.
478+, and see the notes thereto for dispensers having plural openings not restricted to trap chambers, including plural dispensing openings (one of which may serve as a vent when material is not being discharged therethrough).