Tamper evident plastic caps with lower separable or breakaway portions and a method of forming them
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United States of America Patent
Stats
-
Dec 1, 1987
Grant Date -
N/A
app pub date -
Dec 12, 1985
filing date -
Dec 12, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A cap for a container and a method of forming the cap. In the method the cap is molded and includes a plastic skirt provided with a line of weakness. An essentially concave surface of a curling tool engages the lower free end of the skirt and curves it into a curled resilient interfering free end which reduces the internal breath of the plastic skirt prior to capping. Upon capping the curled free end is adapted to provide an interference with the container so that upon initial removal of the cap the line of weakness separates to indicate the condition of the container. The interfering curled free end of the plastic skirt can have a coil, O, U or J cross sectional shape.
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