Closures for containers

A pilfer proof closure for a container having an upstanding neck defining a dispensing opening with a security band portion on the external neck surface thereof, said closure comprising a crown portion adapted to overlay and close said dispensing opening and a skirt depending from the periphery of the crown portion, and including on the internal surface of the skirt, retaining means adapted to cooperate with corresponding retaining means on the container neck, said closure being characterized by the combination of a flexible annular sealing ring depending from the internal surface of the closure inclined inwardly towards the axis thereof, the sealing ring being adapted to engage in sealing relationship with the container neck and a support ring depending from the crown portion and disposed substantially concentrically within the sealing ring to limit flexing of the ring on application of the closure to a container neck, and a skirt extension integrally connected with said skirt through a peripheral weakened skirt portion, said extension being separable from said skirt at said weakened portion and including a resilient pilfer proof security portion including a plurality of tongue elements each hingedly connected with the skirt extension and adapted to extend inwardly thereof to engage the security band portion on the container neck, whereby said security portion on application of the closure to the container neck with relatively low torque enters over the security band portion without rupturing said weakened skirt portion.