| 摘要 |
A composite closure (10, 10', 10a) includes a band (14, 14', 14a) and an insert disk (12) having a peripheral curl (26) and an annular channel (18). An oblique contact surface (36, 36') on the band (14, 14', 14a) urges downwardly against the curl (26) of the disk (12) even while the band (14, 14', 14a) moves longitudinally relative to the disk (12). The closure (10, 10', 10a) has a fully tightened position in which the band's ring (32, 32a) contacts the disk's annular channel (18), a loose position in which the ring (32, 32a) is spaced apart from the annular channel (18), and an intermediate tightened position in which the ring (32, 32a) is spaced apart from the disk (12) and in which the contact surface (36, 36') urges against the curl (26). When the closure (10, 10', 10a) reaches its loose position, a retaining bead (34) presses upwardly against the disk (12).
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