Collapsing bladder positive expulsion device

Details Collapsing bladder positive expulsion device Collapsing bladder positive expulsion device

1978-12-18

1981-04-28

Skaggs, H. Grant

Dispensing

Collapsible wall-type container

With wall-collapsing means

2223865, 220 85B, 222 92, B65D 3528

Patent

active

042640180

ABSTRACT:
Collapsing bladder positive expulsion devices are provided in which the bladder itself is configured to have areas of longitudinal stiffening such that upon the application of external pressure the bladder can be caused to collapse inwardly upon itself in a predetermined fashion without the requirement for a separate internal support structure.

REFERENCES:
patent: 2723779 (1955-11-01), Parker et al.
patent: 3277925 (1966-10-01), Sugimura
patent: 3404813 (1978-10-01), Waxman
patent: 3720389 (1973-03-01), Bisciglia
patent: 3722751 (1973-03-01), Bisciglia
patent: 3979025 (1976-09-01), Fredrich et al.
patent: 4013195 (1977-03-01), Ferris

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