Dispensing – With discharge assistant – Container with follower
Patent
1985-09-05
1987-02-10
Marmor, Charles A.
Dispensing
With discharge assistant
Container with follower
222389, B67D 104
Patent
active
046417656
ABSTRACT:
A pressurized thin walled expandable can from which a fluent pressurized product is dispensed is made from an expandable can wall and a barrier, which may be a fully evertable bag having uniform thickness and flexibility and shaped to fit within the can wall. The open end of the bag is mounted to the can wall by apparatus which maintain a seal as the can wall expands and returns to its unexpanded condition. As product to be dispensed is introduced into the product chamber, the flexible bag is extended down into the lower end of the can. As the product is later expelled through a discharge opening, the flexible bag, which may be plastic, is fully everted into the upper end of the can to expel all the product. The can is thin walled, so that when pressurized, the can diameter expands by at least one one-thousandth (1/1000) of its unexpanded value. In one embodiment, the bag is mounted by a ring inside the can. The ring includes a portion which expands to maintain the seal with the expanding can side wall. In another embodiment the ring is rigid, but of slightly larger diameter than the can. This ring stretches the can, so as to maintain the sealing contact with the can as the can expands. In other embodiments, the bag may be mounted by a stretchable adhesive and, if the bag is slightly elastic, it may be mounted by an adhesive or by a melt seal process such as heat sealing.
REFERENCES:
patent: 3070265 (1962-12-01), Everett
patent: 3931834 (1976-01-01), Caillet
patent: 3940031 (1976-02-01), Fishman
patent: 4171757 (1979-10-01), Diamond
patent: 4308973 (1982-01-01), Irland
patent: 4562942 (1986-01-01), Diamond
Huppert Michael S.
Marmor Charles A.
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