| 摘要 |
<p>In a two-way closable slide fastener having a pair of sliders arranged reversely to each other on interlocking rows of fastener elements, one of the sliders has a tongue projecting forwardly therefrom, whereas the other slider has a socket for receiving the tongue. Built into the socketed slider is a key-operated lock mechanism including a bolt which can be shot into and withdrawn from the socket by manipulation of the key. When the tongue is inserted into the socket upon closure of the fastener, the bolt selectively engages and disengages the tongue for locking and unlocking the sliders.</p> |
