Liquid sequestration bag with pinch closure

摘要

The bag has a closure mechanism that simplifies and reduces the cost of the bag as compared to bags with conventional one-way valves. In one embodiment the valve is formed by two bond lines extending across the width of a plastic bag at different heights and terminating with one bond line above the other to leave an opening through which the bag is filled. Hydrophilic material expands to tension the opening and pinch it closed. In a second embodiment the one-way valve is formed on the angled edges of a two layer insert. This embodiment is functional with or without hydrophilic material. In both embodiments a supplemental closure is secured at the top of the bag to simplify opening the bag top and holding the bag while in use.

主权项

1. A bag for collecting and sequestering a liquid comprising:
a flexible plastic material forming a bag with an open top and having two layers of the plastic material overlying one another; a closeable opening formed by two bond lines joining the layers of plastic material: wherein the bond lines include an upper bond line and a lower bond line that divide the bad into an upper entry chamber and a lower reservoir fluidly connected by the closeable opening; wherein the upper bond line extends downwardly at an angle of less than 45 degrees from the horizontal from a first side of the bag, wherein the upper bond line extends from the first side of the bag a distance of more than one-half of the width of the bag at the widest part of the bag and has a terminus before reaching a second side of the bag; wherein the lower bond line extends from the second side of the bag and terminates below the terminus of the upper bond line; a hydrophilic absorbent material located in the lower reservoir, wherein the absorbent material expands after absorbing the liquid to flex the bag at the upper bond line and the lower bond line and tensions the layers of plastic material at the closeable opening to form a pinch closing the opening.