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

B - Operations, Transporting

65

D

B65D 41/46 (2006.01) B29C 65/00 (2006.01) B29C 65/02 (2006.01) B65D 1/02 (2006.01) B65D 41/04 (2006.01) B65D 41/17 (2006.01) B65D 41/34 (2006.01) B65D 55/08 (2006.01) B65D 77/20 (2006.01)

Patent

CA 2047916

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 sequential- ly 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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