Screw cap with security ring
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 19, 1985
Grant Date -
N/A
app pub date -
Aug 24, 1983
filing date -
Jun 1, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a screw cap for a container neck, comprising an internally threaded cap portion and a security ring joined by means of inclined bridge portions to the cap portion. The sealing ring is resiliently deformable and is designed to be forced over and past a collar around the neck of the container, when the cap is being screwed on for the first time. Recesses are provided in the lower part of the cap portion and/or the upper part of the sealing ring, in which recesses the bridge portions are secured. The bridge portions are so inclined that the upper edge of the security ring can engage the lower edge of the cap skirt when, during screwing on of the cap for the first time, the security ring engages the collar, without undue bending of the bridge portions, so that the cap portion can support the security ring while the latter is forced over the collar. However, when the cap is unscrewed, and the security ring is stopped by the collar, the bridge portions are first bent substantially, and thereby weakened and are tensioned, to rupture, during continued unscrewing of the cap portion.
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