| 摘要 |
<p>A one-piece pull-tight or strap-type security seal adapted for closing bags or the like that is designed to be easily applied in comparison with existing ones. One seal of this type has a lever operation in which a closure strap ( 4) is integral with a central or operating portion (2) that is, its turn, integral with a lever member (6) to which the strap may be fixed during application around the neck of a bag to be closed. The lever member is then pivoted outwardly and backwardly over the operating portion, tightening the loop so formed by means of a lever action, and then locked by security locki ng formations (16, 19) to effect sealing. According to the invention, the closu re strap is for all effects flat, its formations for fixing it to the lever member (6) comprising a series of orifices (7) distributed along its length, whereas the immobilising formation for the closure strap comprises a first protuberance (15) adapted, on formation of the loop (25), to be received in one of the said orifices (7). The operating member (2) may be provided with an elastic hook (24) that, in the closed position of the seal, passes through another of the orifices (7) in the closure strap so as to maintain the seal closed even if the locking formations are damaged or broken. A separate seal (26) is also described, in one embodiment, so as to permit uses of the one- piece seal (1) after the first use when the security locking formations 816, 19) have already been damaged or broken.</p> |
