Snap-on, screw-off cap and container neck

Details Snap-on, screw-off cap and container neck Snap-on, screw-off cap and container neck

1990-08-09

1993-03-02

Marcus, Stephen

Bottles and jars

Closures

Frangible member or portion

215318, 215320, 215329, 215354, B65D 4134

Patent

active

051901781

ABSTRACT:
A tamper-evident, snap-on, screw-off closure is used with a specially shaped container neck. The neck has double lead external threads and, below the threads, external ratchet teeth arranged in two diametrically opposed quadrants. The closure has an upper skirt having internal threads mating with the neck threads. A lower skirt is connected to the upper skirt by a plurality of frangible bridges. The lower skirt has opposed quadrants having internal ratchet teeth to mate with the neck ratchet teeth. The lower skirt has a tear tab which, when pulled, fractures the lower skirt on a vertical line. Continued pulling on the tab sequentially fractures the bridges. The tear tab constitutes an orientation means to properly locate the cap on the neck so that an axial downward push on the cap engages the internal and external threads and internal and external ratchet teeth.

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