| 摘要 |
<p>1424680 Seals ENVOPAK Ltd 23 Nov 1973 [13 Dec 1972] 57390/72 Heading E2A [Also in Division B6] A seal for the slide fastener 13 of a reusable mailing envelope 10 or other containers or casings, comprises, in the form shown in Figs. 2 and 3, a disposable plug 18 which has a pair of latching pawls 30 which engage under end plate 19 of the fastener to hold the slide tab 16 in the fastened position shown over ears 23, until the head 26 of the seal is broken off at neck 31. The pawl part falls clear into the envelope. In the modified form shown in Fig. 4, the seal 18 is slid horizontally into hole 22 to prevent the tab 16 being lifted off detent 23' until broken off at neck 31. The seal is of plastics material.</p> |
