| 摘要 |
<p>A one-piece pull-tight or strap-type security seal adapted for closing bags or the like that is designer to be easily applied in comparison with existing ones. One seal of this type has a lever operation in which a clousure strap ( 4 ) is integral with a central or operating portion ( 2 ) that is, in 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 opening portion, tightening the loop so formed by means of a lever action, and then locked by security locking formations ( 16, 19 ) to effect sealing. The closure strap is for all effects flat, its formations for fixing it to the lever member ( 6 ) including a series of orifices ( 7 ) distributed along its length, whereas the immobilizing formation for the closure strap includes a first protuberance ( 15 ) adapted, on formation of the loop ( 25 ), to be received in one of the 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 securing locking formations ( 16, 19 ) have already been damaged or broken.</p> |
