Closure assembly

A cap device for assembly, together with a resilient stopper, to the rim of a vial defining a neck opening, comprising;

• an integral member including a cap having a top wall, said top wall provided with a central opening surrounded by a rim having an outer periphery,
• an outer sleeve having an inner surface provided with a lower edge, said outer sleeve affixed to said cap by means of a frangible line joining said sleeve lower edge to said cap outer periphery,
• a skirt portion depending from said cap outer periphery beneath said sleeve lower edge, said skirt portion including a plurality of skirt segments having lower ends flared outwardly from the vertical, said skirt segments including inwardly directed locking means on said lower ends, and
• a top post extending upwardly from and overlying said cap top wall opening, said top post affixed to said cap top wall by means of a frangible line.

A method of providing a closure assembly for a vial having a neck opening surrounding a rim provided with an outermost periphery having a bottom most shoulder, comprising;

• forming a cap device comprising an integral member including a cap having a top wall including an outer periphery from which depends an outwardly flared skirt portion having locking means thereon, said integral member including an outer sleeve having an inner surface provided with a top edge and an opposite lower edge attached to said cap top wall outer periphery by means of a frangible line,
• selecting a resilient stopper having a central septum area surrounded by a rim having an outer edge,
• installing said stopper rim atop said vial rim,
• axially advancing said cap device toward said stopper with said skirt portion passing and overlying said stopper outer edge and vial rim peripheral surface,
• continuing said axially advancing step until said cap top wall abuts said stopper,
• applying axial pressure upon said outer sleeve top edge and rupturing said frangible line,
• continuing said step of applying axial pressure to downwardly displace said outer sleeve with said inner surface progressively shifting said outwardly flared skirt portion inwardly with said skirt portion locking means becoming engaged with said vial rim shoulder and retaining said resilient stopper compressibly captive between said cap top wall and vial rim.