FIELD: packing.
SUBSTANCE: invention relates to caps locked on container neck with the help of special-shape thread. Threaded assembly comprises capping device (12) with section of base and section of skirt, first screw thread on container neck comprising one or more threaded segments and second screw thread on capping device skirt inner surface comprising one or more second threaded segments. It comprises also first locking ledge on container neck separated from first threaded segments and second locking ledge on aforesaid inner surface separated from second threaded segments. First and second locking ledges resist unscrewing of capping device from completely locked position on container neck unless minimum preset opening unscrewing moment is applied. First and second locking ledges overlap, in lengthwise direction, first and second threaded segments when capping device is completely locked on container neck.
EFFECT: reduced material input and improved capping.
13 cl, 4 dwg
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