Apparatus for detaching foldable inner bags from the inner walls of rigid outer containers

An apparatus for detaching foldable inner bags from inner walls of associated rigid outer containers of containers, which are manufactured in a coextrusion process, wherein the inner bags have a considerable stiffness and a rough surface with microscopically small protuberances and recesses and thereby adhere to the outer containers only with low adhesive forces without being welded to the outer containers, and wherein the outer containers have an at least partially open pinch seam at their base, in which a welded base seam of the inner bags is held, the apparatus comprising:

• a conveyor track for upright containers, which is constituted by a horizontal, rotating conveyor belt, a vertical conveyor belt rotating in the same direction, which is arranged on one side of the horizontal conveyor belt (2), and a vertical, fixed belt (6)-on the opposite side of the horizontal conveyor belt, wherein a distance between the vertical conveyor belt (4)-and the fixed belt is smaller than an outer diameter of the upright containers so that the upright containers rotate about a vertical axis when the upright containers pass between the rotating vertical conveyor belt and the fixed vertical belt and are laterally compressed so that the inner bags abruptly separate from the outer containers.