Dispensing – Collapsible wall-type container – With wall-collapsing means
Patent
1981-10-26
1984-07-03
Marmor, Charles A.
Dispensing
Collapsible wall-type container
With wall-collapsing means
222209, 222212, 222321, 2223865, 222383, B65D 3700
Patent
active
044574541
ABSTRACT:
A two-compartment dispenser of fluent material includes a primary compartment having a collapsible wall and initially holding the main body of the material, a secondary compartment, and a compartment separator that forms a barrier between the two compartments and has a passage for the fluent material to flow from the primary to the secondary compartment. A dispensing nozzle as connected to the secondary compartment, which also has a movable wall portion resiliently biased to expand the volume of the secondary compartment to its fullest extent. A check valve controls the passage through the compartment separator and is closed when the movable part of the secondary compartment is pressed inwardly to force fluent material from the secondary compartment out through the dispensing nozzle. Release of pressure on the movable part reduces pressure in the secondary compartment and allows the check valve to open so that fluent material can flow from the primary compartment to the secondary compartment. Ambient air pressure on the collapsible wall reduces the volume of the primary compartment an amount equal to the volume of material transferred to the secondary compartment. A rigid outer casing vented to the atmosphere protects the collapsible primary compartment from being inadvertently squeezed.
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patent: 4008830 (1977-02-01), Meshberg
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