| 摘要 |
A sealed wrapper (1) has a longitudinal closure fin (2) folded flat on to it along a fold line including a strip (5) or thread-like tear element disposed in a loop under the wrapper and transversely of the fin. The wrapper and the fin have along the fold line, two incisions transverse to the fold line and alongside, respectively on one side and the other, of the tear element. The incisions pass right through the wrapper material, and are impermeable. The flap has a sealing band separated from the fold line, at least in the region of the tear element and the incisions by an unsealed reserve zone.
|
