Self-closing valve with tamper evident lip seal tab for liquids,

Details Self-closing valve with tamper evident lip seal tab for liquids, Self-closing valve with tamper evident lip seal tab for liquids,

1988-07-08

1990-04-17

Bartuska, F. J.

Dispensing

Collapsible wall-type container

Nonmetallic

222212, 222494, 222541, B65D 3508, B65D 3548

Patent

active

049172670

ABSTRACT:
The invention pertains to a thermoplastic squeezable self-closing valve, capable of discharging, at requlated flow rates, liquids, pastes and solids such as powder, pills capsules and the like. This novel valve can be formed as an integral part of the container; or separately for attachment to other than flexible plastic containers; or thermoformed and heat sealed with a separable lip seal shipping tab after the container filling operation, thereby eliminating easily removable screwed bottle caps and the like for tamper protection of container contents. Other novel valve features includes methods, for drip prevention; establishing a liquid spray; forming a built-in clip lip seal; forming the squeezable valve as part of the hollow cored lifting handle used in present plastic milk and juice containers.

REFERENCES:
patent: 2333587 (1943-11-01), Salfisberg
patent: 2663461 (1953-12-01), Brown
patent: 2893611 (1959-07-01), Akers
patent: 2904225 (1959-09-01), Earles
patent: 3255925 (1966-06-01), Park
patent: 3342318 (1967-09-01), Ruekberg et al.
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patent: 3610477 (1971-10-01), Herzig
patent: 3841537 (1974-10-01), Marg et al.
patent: 3878977 (1975-04-01), Carlisle
patent: 4284213 (1981-08-01), Lee
patent: 4319701 (1982-03-01), Cambio
patent: 4564130 (1986-01-01), Eulenburg
patent: 4640441 (1987-02-01), Bunschoten

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