In a novel variable-volume body fillable with fluid, consisting of at least two overlying films (1,2) (preferably of plastics) welded together along at least one closed curve (specifically the peripheral edge), the films are parallel to each other at the s...

The body has two welded foils (2) from plastic material, and is spaced one above the other. The foils form a hinge region along a folding axis (F). The foils are folded on top of each other along the hinge region by forming two partial portions of the body...

The inflatable cushion for use in cars is made up of two sheets (2, 3) which are folded over each other and bound together to form a hinge. A separate film spacer (9) or embossed rib holds the sheets apart in one area, assisting complete emptying of the cu...