Tapered and flanged rubber stopper

Details Tapered and flanged rubber stopper Tapered and flanged rubber stopper

1984-05-07

1985-10-01

Norton, Donald F.

Bottles and jars

Closures

Stopper type

220307, B65D 3904

Patent

active

045440743

ABSTRACT:
A stopper for use as a closure in various applications comprises a cup-like member of flexible rubber or thermoplastic material. The stopper has an upper flange defining the stopper rim, a lower flange, a tapering nose portion beneath the lower flange forming the stopper base, and a wall portion between the flanges. The wall portion has an outer surface which tapers inwardly from the upper flange toward the lower flange at a specified angle. The tapered surface facilitates insertion of the stopper into an opening in a thin walled container for example, and allows the stopper to form an adequate seal in openings which are over- or undersize as compared to the nominal opening diameter, or which have other irregularities.

REFERENCES:
patent: 3162411 (1964-12-01), Duggan

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