Packaging assembly for contaminable materials

Details Packaging assembly for contaminable materials Packaging assembly for contaminable materials

1990-02-26

1991-05-28

Marcus, Stephen

Flexible bags

With closure

For access opening in bag bottom

383 61, 383 71, 383113, 383117, 383906, 141 93, 141114, 141314, 222105, B65D 3004, B65D 3336

Patent

active

050188771

ABSTRACT:
A package assembly for providing ultra-clean storage and gravity discharge of contaminable powder or granular materials which comprises an outer container, a sterile vapor impermeable bag within said container, said bag having a bag body an inlet and an outlet, said inlet and outlet being closed when said bag accommodates said material to prevent contamination of said material, said outlet defining an opening, a flexible vapor impermeable tubular inner sheet extending from said opening and having a discharge end, a vapor impermeable tubular outer sheet enveloping said inner sheet terminating in a closed end, said inner sheet being secured by releasable securing means proximate said opening to prevent discharge of materials from said opening whereby when said inner sheet is positioned in a receiving means and said terminal end of said outer sheet is open and positioned around said receiving means and secured thereto, release of said securing means permits discharge of said material into said receiving means without contamination of said material.

REFERENCES:
patent: 3789897 (1974-02-01), Saito
patent: 3961655 (1976-06-01), Nattrass et al.
patent: 4113146 (1978-09-01), Williamson
patent: 4221250 (1980-09-01), Manerba
patent: 4296860 (1981-10-01), Hsu et al.
patent: 4479243 (1984-10-01), Derby et al.

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