| 摘要 |
<p>A container (1) obtained by blow-moulding of two face-to-face sheets of plastics has an outlet neck (2) which can be opened by peeling apart a zone of an outline seal rib (3) and which can be re-closed by means of a fork (14) connected by a strap (15) to a ring (6). The ring (6) slides on the neck (2) and has an internal surface formed with diametrically opposite incisions (7) to guide the ring (6) on the rib (3). The incisions (7) are interconnected by internal surface zones diverging towards the outer end of the neck (2) to accommodate correspondingly shaped parts of the neck which are splayed by lowering of the ring (6) after the neck (2) has been opened. The bases of the incisions (7) converge towards the outer end of the neck (2) to co-operate with correspondingly converging edges of the rib (3). To hold the ring (6) in position, upper edges of the bases of the incisions (7) engage stepped seats formed in the rib (3).</p> |
