Interference stop punch-out closure

Details Interference stop punch-out closure Interference stop punch-out closure

1983-04-27

1984-12-25

Hall, George T.

Dispensing

With frangible closure for outlet

222565, 222556, 222480, 220253, 220258, B65D 4710

Patent

active

044898649

ABSTRACT:
A tubular container is provided with a top end punch-out closure comprising a one-piece plastic cap and a rotor on the cap. A punch-out tab defined by a tearing web on the cap can be forced by finger pressure to hinge down from the cap to form a dispensing opening that is aligned with the major dispensing opening on the rotor at the fully open dispensing condition of the rotor. The side of the tab opening opposite the hinge has an arcuate edge that is substantially congruent with a corresponding arcuate edge of the major dispensing opening when the closure is fully open, with the radius of the latter being slightly smaller than the radius of the former to maintain an interference fit if the tab breaks off. The substantially congruent arcuate shapes allow exertion of downward compressive finger pressure at a location sufficiently close to the tearing web to indirectly apply tensile pressure with sufficient concentration to rupture the web.

REFERENCES:
patent: 2961132 (1960-11-01), Ankney
patent: 3874580 (1975-04-01), Weatherhead
patent: 3877604 (1975-05-01), Brown
patent: 3912128 (1975-10-01), Ziemann
patent: 4308979 (1982-01-01), Otterson

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