FIELD: packing equipment, particularly closures for discharge foaming or fog-like liquids by pumping.
SUBSTANCE: bellows pump connected with liquid container is adapted to inject gas. The pump has suction means for liquid intake from container under reciprocal movement thereof, mixing chamber to mix gas with liquid communicated with suction means during suction means movement and resilient means to return the suction means from the second position in the first one. The resilient means form volume-changeable gas chamber, which may be communicated with the mixing chamber during suction means movement from the first position to the second one to supply gas into the mixing chamber in which gas-and-liquid mixture is created.
EFFECT: increased reliability of product discharge without liquid accumulation inside the bellows pump, possibility to obtain foam having constant composition.
58 cl, 24 dwg
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