Bottles and jars – Closures – Cap type
Patent
1988-02-05
1989-01-03
Norton, Donald F.
Bottles and jars
Closures
Cap type
220310, B65D 4112
Patent
active
047950455
ABSTRACT:
The present invention provides a closure for a container, preferably a plastic aerosol container on which there is provided a specially designed neck. A metal cup having vent slots is fittable on the container top and neck. The cup has formed at its periphery an inwardly curled tuck and a rounded top portion which fits over a rounded annular shoulder on the neck. The radius of the rounded annular shoulder of the neck is larger than the radius of the rounded top portion of the cup. The neck further includes a tuck support member having a horizontal ledge. A tuck pocket is formed between the annular shoulder and the tuck support member to accomodate the tuck in the cup. Sealing of the cup to the container occurs at the annular shoulder of the neck by pressure of a pressure ring in concert with a pilot of a closure die on the cup top portion. Because of the difference in radii between the rounded annular shoulder and the rounded top portion of the cup, the cup is pressure sealed to the annular shoulder at at least two points on the sides of the annular shoulder. The tuck of the cup is inserted in the tuck pocket and the ledge of the tuck support member prevents the tuck from unravelling during sealing.
REFERENCES:
patent: 582762 (1897-05-01), Painter
patent: 3104773 (1963-09-01), Podesta et al.
patent: 4318493 (1982-03-01), Jacobsen
patent: 4561555 (1985-12-01), Miller
Collins Bruce M.
Goebel Ronald G.
Norton Donald F.
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