Abstract: An apparatus and method are disclosed for successively forming foam filled cushions for packaging purposes of the type in which a bag containing foam precursors is added to a container so that as the foam precursors form foam, the bag forms a custom cushion adjacent objects in the container. The method comprises attaching an adhesive strip to the longitudinal edges of a pair of sheets of plastic film material being advanced along predetermined paths of travel in face to face contact from a stock supply, and between which sheets a foamable composition is injected, to thereby join the sheets together and form one edge of the bag, while periodically sealing the leading edge and the trailing edge of the sheets together transversely to the path of travel to form a bag while periodically severing a completed bag from the next succeeding bag being formed.