Title: Secondary closure, method and apparatus

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Abstract: A molded capsule or the like serving as a secondary closure for a wine bottle or the like which may already be closed by a cork or the like is securely applied to the neck of the bottle by advancing the open end of the capsule against the already closed neck of the bottle, which may be oversized with respect to the capsule diameter, to form an initial air seal between the capsule and the bottle. Air is then injected into the capsule so as to provide an air column within the capsule which supports the capsule walls against collapse and lubricates the advance of the capsule longitudinally onto the neck of the bottle. Apparatus for accomplishing this assembly method includes means for injecting air into the capsule when initially placed against the neck of the bottle while simultaneously sealing the capsule against an excessive escape of injected air from the capsule, pressure relief means being provided to controllably release air from the capsule as the volume in which the aforementioned air column can reside is reduced by advancement of the capsule onto the neck of the bottle.


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