Bottle closure insert.

摘要

A bottle closure comprises a valved insert comprising a housing 11 and a valve member 17 which is initially biassed by a spring 18 into a closed condition. Insertion of a measure dispenser spigot moves the member 17 into an open condition. Removal of the spigot, causes the member 17 to move into a closed condition. The member carries a spindle 30 which co-operates in pawl and ratchet manner with pawls 32 which prevent movement into the open condition. This pawl and ratchet detent is initially ineffective since the pawls are held out of co-operation by a bush 31 which is a tight frictional fit on the spindle and during an opening movement is held so the spindle slides through it but on a subsequent closing movement is held by the spindle and drawn out from the pawls so releasing them. Thus the bottle cannot be re-used once on a measure dispenser. Other embodiments show a valve member co-operating with other movable parts to form a sleeve valve which is initially locked open by a detent but closes as a result of an initial opening movement and subsequent closing movement. Various refinements are shown.