Closing for exit orifice of packing has inflatable portion that is immovably arranged between retainer and sunken portion

摘要

The closing includes an inflatable portion and a cylindrical sunken portion as well as a separation unit that prevents the passage of liquid towards the inflatable portion. The sunken portion has a flue in which the inflatable portion is mounted and which forms a cavity. A retainer is provided with a cylindrical extension and fixation components that connect the retainer to the sunken portion such that the inflatable portion remains immovable between the sunken portion and retainer. An independent claim is also included for a method of manufacturing a closing.