| 摘要 |
PCT No. PCT/AU96/00331 Sec. 371 Date Nov. 5, 1997 Sec. 102(e) Date Nov. 5, 1997 PCT Filed May 31, 1996 PCT Pub. No. WO96/40569 PCT Pub. Date Dec. 19, 1996A closure system for open headed containers utilizing a thermoplastic closure of the type having a disk and skirt depending therefrom the skirt portion including an annular ring adjacent its lower extremity adapted to lie beneath and radially inwardly with respect to an outwardly directed annular protrusion on a complementary container; a weakened stress relieving annular portion on the skirt lying immediately above said annular ring; the annular weakened portion having a wall thickness sized to ensure that stress relief and attendant creep in the thermoplastic material of the closure after affixation of the closure to the container occurs substantially at the annular weakened portion thereby allowing the lower portions of the annular ring to move radially inwardly; the wall thickness of the annular weakened portion at all times being of adequate thickness to resist premature rupture in the event that the closure/container unit is subjected to an impact; seal means between the closure and the container above the annular ring.
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