Flexible liq. container made from leaves - which are heat welded together and fitted with valve

摘要

The container is made up of a number of leaves of different sizes. The largest outer leaves are folded over into a U-shape. One of the ends of the U is tucked into the ends of the other leaves which are shorter than the folded leaves. The folded leaves are on the outside of the container. The leaves are heat welded together on one side of the container in the form of a "C". One opening is left by cutting open the side of the container having all the leaves together.