Patent ID: 8181809

Claim:
A closure device for reversibly closing an opening on a container, comprising a deformable stretchable planarly extending cover which can be moved into at least two operating positions, a guide disk which rests on the cover on the side thereof remote from the container and co-operates with the cover, wherein the cover is aligned in a first operating position with the opening of the container and in a second operating position undercuts the opening of the container over the entire periphery with a peripheral edge portion so that the undercutting region on the cover and the undercut region on the container form complementary sealing surfaces for gas-tightly and liquid-tightly closing the opening; and an actuable means for applying a force to the cover for deformation of the cover in such a way that it is deformable from one of the two operating positions into the other operating position, and a means for venting the container comprising a venting passage for the container, which is closed by a valve device, wherein the valve device is operatively connected to the actuating means for applying a force to the cover.