Bottles and jars – Closures – Having warning means or means impeding closure removal
Patent
1987-08-18
1988-10-25
Norton, Donald F.
Bottles and jars
Closures
Having warning means or means impeding closure removal
215221, B65D 5502
Patent
active
047797479
ABSTRACT:
The neck of a flask has an upper portion with a thread adapted for cooperating with an internal thread of a cylindrical screw cap. The cap has a lower portion carrying a radial male key which bears on a lower portion of the neck of the flask when the cap is screwed onto said neck; at least two concentrical annuluses are held by an inner ring in a cylindrical groove of the flask, and also in a groove formed in an upper portion of the lower annulus for the mobile annulus. The two annuluses are each formed with a walled passage for disengagement of the radial male key when the cap is unscrewed from the neck of the flask. The screw cap and the concentrical annuluses each having a guiding mark for vertical alignment of the male key and the walled passages.
REFERENCES:
patent: 2908413 (1959-10-01), O'Donnell
patent: 3407954 (1968-10-01), Millis
patent: 3450290 (1969-06-01), Turner
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