| 摘要 |
<p>A closure system includes a container (31) and a closure (1) comprising a cap (3) having a cylindrical skirt (7) with internal threads (11), an annular tamper band (13) having an inside diameter larger than the outside diameter of the skirt forming an annular gap (15) therebetween, and flexible bridges (17) joining the tamper band (13) to the free end (9) of the cap skirt (7). The bridges (17) have angularly spaced end segments extending radially outward (19) and radially inward (21) from the skirt (7) and tamper band (13) respectively, and an intermediate segment (23) extending arcuately around the gap (15) between the end segments. The closure (1) is integrally molded with the bridges (17) and tamper band (13) extending radially outward in a common plane transverse to the central axis (29) of the cap (3). The bridges (17) flex to allow axial extension of the tamper band (13) for bonding to a shoulder (45) or transfer bead (55) on the container. Unscrewing of the cap (3) fractures the bridges (17), preferably at a section of reduced cross-section provided by notches (25, 27) at the intersection of the bridges (17) with the cap skirt (7). The set of the resilient bridges (17) causes them to spring against the container shoulder (45) or transfer bead (55) upon fracturing to provide a positive visual indication of opening or tampering with the closure (1).</p> |
