Multi-part closure device for active substance containers

Multi-part closure device (2) for coupling to a medical active substance container (1) with a suitable collar (101) connected to a bottle neck (10) of the active substance container (1) ;

• wherein the multi-part closure device (2) comprises a sealing plug (20), a plug securing device (21) and preferably a protective cover (22),
• wherein the sealing plug (20) is adapted be secured to the active substance container (1) by means of the plug securing device (21), thereby sealing an opening in the bottle neck (10) of the active substance container (1) and permitting airtight removal of liquid active substance,
• characterized in that
• the plug securing device (21) comprises a securing cage (210) with a centric ring (2101), a central opening and a side wall (2102),
• wherein the securing cage (210) has a plurality of undercut webs (2103) formed along the side wall (2102) and adapted to engage the collar (101) of the bottle neck (10), the undercut webs (2103) being bent in a tilted manner in the direction of a longitudinal axis (L) of the plug securing device (21);
• and the plug securing device (21) has an outer cage shell (211) which surrounds the securing cage (210) in a radially outwardly offset manner and has a central opening (2111);
• wherein the cage shell (211) is made of metal or of plastic and/or wherein the cage shell (211) is connected to the securing cage (210) by material closure, in particular by gluing or welding, by form closure or by force closure.