| 摘要 |
A plastic screw cap has a threaded top portion and tabs of varying heights disposed around an inner circumference of a lower sleeve-portion. These tabs clasp a land disposed on a container neck to restrain the sleeve portion on the neck when the cap is unscrewed. A threaded top portion mates with threads on the container above the land. A sealing liner and diffusion barrier disposed at the bottle opening, together with a crush-resistant cap structure, prevent wine leakage and control oxygen ingress. Typically, the plastic cap is threaded onto the container neck, forming a tamper-evident seal. When unscrewed, the plastic-cap top moves up the container threads, exerting a pull on the sleeve portion, which is restrained due to the closure tabs acting on the land. Between the closure tabs and the threaded top is a breakaway line, which tears due to the removal forces. This tear evidences tampering. |
