초록 ▼

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

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.

대표청구항 ▼

In combination with a flexible packaging bag having first and second surfaces interconnected at the peripheries thereof, anticlosure means within said bag for preventing entrapment of portions of the bag contents in folds in said bag and by stoppage of a dispensing aperture in said bag as said flexi

In combination with a flexible packaging bag having first and second surfaces interconnected at the peripheries thereof, anticlosure means within said bag for preventing entrapment of portions of the bag contents in folds in said bag and by stoppage of a dispensing aperture in said bag as said flexible bag collapses during dispensing of the contents therefrom, said anticlosure means comprising: a thin elongated stiffening member having one end attached to an inner surface of the flexible bag and near the position of a dispensing aperture in said bag, the long axis of said stiffening member being substantially parallel with the longer axis of said bag, said stiffening member being flexible when dry and becoming stiffened by exposure to moisture.