Apparatus for manufacturing a lined container

Apparatus for the manufacture of a container comprising an outer container of cardboard or similar stiff material and a lining of synthetic resin or any other easily formable material which is applied in the outer container and which at one end of the container exposes an openable lining side and which is adapted to be filled and closed at the opposite end, and in which the lining bag at the opening side thereof is somewhat pressed into itself thereby providing a projecting lining rib extending around the openable lining side and in which the lining rib is kept enclosed between top flaps and sides of the outer container, comprising an expandable mandrel including a number of rotatably mounted mandrel arms which at the lower ends thereof are formed with a thin corner rib, which mandrel arms are rotatable in directions out towards the corners of the container, whereby an expansion of the mandrel arms provides a pressing outwards of the corners of the lining bag, said mandrel arms being mounted axially movably on a supporting shaft such that said mandrel arms cooperate with a cam means which is fixedly mounted on the supporting shaft, so that the mandrel arms are expanded when being moved down in relation to the supporting shaft.