Flexible bags – With means to maintain the bag mouth in an open configuration
Patent
1983-11-25
1985-06-18
Lowrance, George E.
Flexible bags
With means to maintain the bag mouth in an open configuration
383 37, 383 46, 222105, 222183, 220 86R, B65D 1920
Patent
active
045244588
ABSTRACT:
Flexible plastic bags used for the bulk storage and dispensing of fluids are often blocked from dispensing all the contents and/or entrap part of the contents in folds of the plastic as they shrink during dispensing. The invention is for a tongue or dip tube that is attached to the inner wall of the plastic bag near the location of the dispensing aperture. The tongue is formed of a laminate of two dissimilar materials, one non-hygroscopic and the other being hygroscopic, so that upon introduction of moisture into the bag, the hygroscopic layer will expand and the normally flat tongue will curl to form a thick tube that both prevents collapse of the bag and prevents closure of the dispensing aperture by the opposite wall of the bag.
REFERENCES:
patent: 3112047 (1963-11-01), Weinreich et al.
patent: 3254828 (1966-06-01), Lerner
patent: 3366284 (1968-01-01), Marona et al.
patent: 3469769 (1969-09-01), Guenther
patent: 3471064 (1969-10-01), Micallef
patent: 4193518 (1980-03-01), Holmes
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patent: 4375864 (1983-03-01), Savage
patent: 4381846 (1983-05-01), Heck
Pongrass Robert G.
Rutter Christopher C.
Castle Linval B.
Fidei David T.
Lowrance George E.
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