Medical solution container and port construction

Claim 1

A medical solution container formed of flexible thermoplastic material having a tubular neck projecting away from said container and defining an outlet portion for receiving and retaining the spike of an administration set, said neck having a proximal end merging with said container and a distal end opposite from said proximal end and remote from said container, said distal end including a distal wall portion providing an enlarged cylindrical bore and said proximal end including a proximal wall portion providing a reduced coaxial cylindrical bore, a tapered annular collar disposed within said neck and formed integrally therewith, said collar extending distally from said proximal wall portion into said enlarged bore, said collar also having an inner surface merging proximally with the surface of said reduced cylindrical bore and having an outer surface spaced inwardly from the surface of said enlarged cylindrical bore, said inner and outer surfaces of said tapered collar both sloping inwardly and distally with said outer surface having a greater acute angle of slope, said neck having an annular sealing surface at its distal end, an elastomeric sealing disc engaging said sealing surface, and a tear-off cap detachably affixed to said neck and retaining said disc in place against said sealing surface, said elastomeric sealing disc having planar faces and a generally cylindrical side surface, said disc also having an integral circumferentially-extending rib projecting outwardly from said surface, said rib being spaced equal distances from said planar faces and having a diameter in an undeformed state greater than the outside diameter of said neck, said tear-off cap retaining said disc with one of the planar faces thereof in liquid-tight sealing engagement with said end surface of said neck, said cap also having an inside surface engaging said rib.