Leaktight Container Having a Flexible Wall Comprising a Fixing Ring for Joining it to a Device Allowing the Container to be Removably Connected to an Enclosure

The invention relates to a leaktight container (1) having a flexible wall comprising a bag (2) formed from a flexible film arranged so as to define a leaktight interior volume and a through-opening, and means for fixing the bag (2) to a connecting device (4) for connecting the container (1) in a leaktight manner to a sterile enclosure equipped with a complementary connecting device (4), said fixing means comprising a fixing ring (6) arranged so as to allow the connecting device (4) to be fixed reversibly to the bag (2), said ring being made up of two concentric annular parts fitted one in the other, the external annular part being dimensioned so as to be force-fitted around the internal annular part and to exert a radial stress thereon, the portion of film delimiting the through-opening being gripped between the two annular parts.