Dispensing – With lock or fastening seal – Plural
Patent
1984-10-11
1986-07-08
Rolla, Joseph J.
Dispensing
With lock or fastening seal
Plural
222260, 222387, B67D 532, G01F 1100
Patent
active
045988439
ABSTRACT:
The atmospheric pressure-operated take-up piston of the dispenser is provided with releasable locking structure which retains the piston prior to first intentional actuation of the dispenser against jarring movements tending to pressurize the contents and promote leakage during shipment and storage. Once the piston has been intentionally unlocked from its starting position at one end of the dispenser, it is free to travel under the influence of atmospheric pressure to take up space left vacant by discharged product. Several different forms of structure means for the take-up piston are disclosed.
REFERENCES:
patent: 1902822 (1933-03-01), Becker
patent: 2124077 (1938-07-01), Ostendorf
patent: 3059819 (1962-10-01), Sundholm
patent: 3752367 (1973-08-01), Sundholm
patent: 3847304 (1974-11-01), Cohen
patent: 4511068 (1985-04-01), Bossina
Foster Donald D.
Hills Robert N.
Moore David G.
Nelson Phil L.
Realex Corporation
Rolla Joseph J.
Shaver Kevin P.
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