A CLOSURE

摘要

A closure casing comprising two casing parts, means for holding the two casi ng parts together in juxtaposed relationship, and having means for sealing between an elongate article penetrating the casing and the casing itself, th e casing parts having respective cavities together forming a sealant chamber f or receiving sealant material and through which the elongate article passes in penetrating the closure casing, the volume of the sealant chamber being adjustable whereby to apply a compressive force to sealant material therein, the adjustment being effected by displacement of at least one element locate d within the said sealant chamber, the said element being displaceable within the chamber by selectively operable position-adjustment means of the casing whereby to determine the effective volume of the sealant chamber.