Abstract: A closure system is provided for a threaded container. A threaded closure cap has an annular skirt which engages a resilient gasket that is stretched over the bottle neck. The resilient gasket overlies a cap support flange which extends from the neck. Downward axial movement of the cap with respect to the container provides a vertical compressive force against the resilient gasket by the cap skirt. A heat shrinkable outer member surrounds the closure cap and provides a tamperproof seal with respect to the container.

Abstract: A thermoplastic pharmaceutical solution container includes a neck portion having at least one port through the neck portion. A thermoplastic port protector or closure covers the port and defines a frangible section. The closure has a length to diameter ratio providing good mechanical advantage leverage to rupture the frangible section when the closure is pushed sideways. A seal is formed with the closure by forcing a die heated above the melting point of the plastic material into the neck portion, removing a portion of the port protector and forming a depression. The frangible section is formed in the vertical side wall of the depression.

Abstract: A method is provided for forming a fracturable seal of the type wherein a plastic cup-shaped closure is hermetically sealed to a plastic planar surface, such as the neck of pharmaceutical solution containers. The seal is formed with the closure by forcing a die heated above the melting point of the plastic material into the planar surface, with the sealing die also being in heat exchange relationship with a portion of the closure. Both the planar surface and the closure adjacent thereto become molten and the surface material is displaced to form a fused seal transverse to the surface. The surface is depressed at least 0.005 inch from its original height by the sealing action of the die, and a frangible section is formed in the vertical side wall of the depression. The seal will be fractured due to tension stress when the closure is removed from the surface.

Abstract: A thermoplastic pharmaceutical solution container includes a neck portion having at least one port through the neck portion. A thermoplastic port protector or closure covers the port and defines a frangible section. The closure has a length to diameter ratio providing good mechanical advantage leverage to rupture the frangible section when the closure is pushed sideways. A seal is formed with the closure by forcing a die heated above the melting point of the plastic material into the neck portion, removing a portion of the port protector and forming a depression. The frangible section is formed in the vertical side wall of the depression.

Abstract: A container for storing and dispensing sterile liquids is provided with a hermetically sealed overcap. An outer ring fits over the overcap and the overcap and outer ring have interfitting threads. The outer ring defines a jacking member for moving the overcap axially upwardly on a bottle neck when the outer ring is rotated downwardly. Antibackoff means are provided for axially interlocking the outer ring and overcap, limiting upward rotational displacement of the outer ring with respect to the overcap.

Abstract: A ratchet mechanism is provided for preventing disassembly of an outer ring used to jack a hermetically sealed overcap from the neck of a container. The ratchet mechanism comprises a set of teeth on the outer ring which act in cooperation with a set of teeth on the overcap thereby providing a means for preventing rotation of the outer ring in a direction tending to unscrew the outer ring from the overcap, but permitting rotation of the outer ring in the jacking direction.