Abstract: A sealing disc and a film composite for a container closure is provided, for use on a container with an opening bounded by a peripheral edge. The film composite includes a plurality of layers. An adhesive layer is arranged at least over a joining surface between the upper layer and the underlying layer.

Abstract: A sealing device for sealing non-circular, in particular polygonal, for example tetragonal, hexagonal, octagonal or elliptical, container openings comprises one or a plurality of induction loops (11, 38, 41) for sealing purposes. Containers (2) comprise joined-on closure devices (3) with sealing discs (15) joined onto a sealing edge (14) of the container opening. The induction loops (11, 38, 41) are adapted to the shape of the sealing edge (14) and the spacing between the induction loop (11, 38, 41) and sealing edge (14) is constantly adjustable and selectable.

Abstract: A sealing cover for an opening of a container has a first foil that seals the opening of the container. A metallic foil, especially aluminum foil, is also provided for inductive sealing of the first foil at the lip of the opening, along with a removable sealing lid that is releasably screwed onto the container. A releasable adhesive control layer positioned between the first foil and the metallic foil, enables the metallic foil to be detached from the first foil after the sealing lid has been removed. An elastic layer is provided between the sealing lid and the metallic foil. Between the metallic foil and the elastic layer is a separation layer, which becomes liquid at induction temperatures, and a suction layer. During the induction process, the latter absorbs the liquified substance of the separation layer. The adhesive control layer does not have such an adjoining suction layer.