Crown cork closure and closure device

The invention relates to a cap-like closure system for containers (bottle cap) which has a plurality of serration or tooth-like shape member. In this case, these crown corks are at least partially made of a metal and / or aluminum-containing material (base body) is formed and can be an inner coating of one or more layers comprise (rubber, plastic) for improving the sealing zw. The container mouth and the bottom of the crown cap. The bottle cap is shaped so formed that the shape of ends to the intended, the mouth of the container closing deformation which basically has known corrugated or serrated radial contour, so that one or more cavities between the outer muzzle close container surface and the mold ends, in portion of the mold member is provided a deformable sealing material, which closes the aforesaid cavities. The cavity closure in the axial direction has to not be complete, but at least a wreath or annular closure or sealing element is achieved in the circumferential direction.