Packaging element has two connecting pieces, extensible section with protuberance and sloping section.

摘要

The packaging element (1) comprises two connecting pieces (11,12) mounted on two ends of the packaging element for joining them to another packaging element. An extensible section (13) is mounted between two connecting pieces for joining the two connecting pieces. The extensible section has at least one protuberance (131) and at least one sloping section (132) which are alternately joined together to form a bellows type extensible section.