Verschlußkappe

摘要

A closure cap, in particular for reusable PET bottles (1), has a wall (3) provided with an inner thread (2), a front wall (4) that delimits the cap wall (3) and if required a ring-shaped tamper-evident strip (6) linked to the cap wall (3) and which can be torn at a predetermined breaking point (5). The front wall (4) has a ring-shaped inner seal (7) spaced apart from the cap wall (3), which projects in the direction of the open end and whose outer diameter is tapered in the area (9) of the free end, towards said free end. In order to ensure a gas-tight closure, the inner seal (7) has a swelling (8) in the area of the free end, oriented towards the cap wall (3), and surrounding the area (9) with a tapering outer diameter.