Bottles and jars – Closures – With pressure-responsive seal
Patent
1992-05-06
1993-10-12
Shoap, Allan N.
Bottles and jars
Closures
With pressure-responsive seal
215271, 215307, 215305, 220240, 220366, 220360, 220379, B65D 5300
Patent
active
052517705
ABSTRACT:
A container and pressure sealing closure combination in which the closure includes a rim portion engaging the mouth of the container, a substantially rigid central portion and an annular toggle portion pivotally connected to and interconnecting the rim portion and central portion, whereby upward movement of the central portion in response to internal pressure of the contents of the container pivots the toggle portion to urge the rim portion substantially radially outwardly against the mouth, thereby effecting a seal. In a preferred embodiment, the inner surface of the container mouth includes a plurality of axially-extending channels for conducting pressurized gaseous contents of the container between the closure and the container to the ambient. The outer surface of the mouth includes an annular recess which receives a plurality of radially inwardly projecting ribs on the rim portion, thereby effecting engagement between the closure and container. The closure includes a tab which is pivoted upwardly to remove the closure from the container, and the rim portion includes a plurality of sets of radially extending slots which fracture when the tab is pivoted upward, thereby preventing reattachment of the closure. Also in the preferred embodiment, the container includes an annular base shaped to receive the closure.
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Bartley Harold D.
Gaiser William R.
Broadway Companies, Inc.
Schwarz Paul A.
Shoap Allan N.
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