FIELD: packing.
SUBSTANCE: proposed sealing unit has neck with hole and seal for neck. Seal is provided with base, skirt and first thread on neck. First thread has one or more first sections of thread. Second thread is made on inner surface of seal skirt. Said second thread has one or more second sections of thread. Threads of first and second sections are made of shape to provide possibility of fastening, removing and re-fastening of seal in position providing adequate sealing on neck by rotating seal on neck. First sections of thread are shorter than second sections. Each second section of thread consists of one or more spaced radially projecting parts, each said part passes radially around 60° of seal skirt, maximum.
EFFECT: improved convenience in use.
17 cl, 5 dwg
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