초록 ▼

Screw on caps for bottles that have an anti back off feature formed on a hinged tab of the cap engaging detent teeth below the threads on the bottle. The hinge has a unique configuration that enables the tab to snap into and hold a gripping position while avoiding temporary distortion or creep. The

Screw on caps for bottles that have an anti back off feature formed on a hinged tab of the cap engaging detent teeth below the threads on the bottle. The hinge has a unique configuration that enables the tab to snap into and hold a gripping position while avoiding temporary distortion or creep. The detent teeth are particularly suited for use with blow molded bottles and are capable of restraining a cap within a small angle of a fully tightened position to avoid any significant back off and potential leakage. In one embodiment, the anti back off feature is provided in a child resistant cap while in another embodiment this feature is provided in a simpler continuous thread cap.

대표청구항 ▼

[ What is claimed is:] [1.]1. A child resistant and leak resistant cap comprising an injection molded one-piece thermoplastic body for use on a bottle with an externally threaded neck finish, the cap being generally circular and having a major stop surface normally preventing the cap from being unsc

[ What is claimed is:] [1.]1. A child resistant and leak resistant cap comprising an injection molded one-piece thermoplastic body for use on a bottle with an externally threaded neck finish, the cap being generally circular and having a major stop surface normally preventing the cap from being unscrewed from the bottle, squeezable portions on diametrally opposite sides that function to release the cap from the bottle for unscrewing when squeezed, an anti back off stop surface separate from the major stop surface and engageable with formations on the bottle below the threads on the neck, the anti back off surface being constructed and arranged to operate with relatively closely spaced formations on the bottle whereby the anti back off surface formations can limit the degree to which the cap unintentionally can unscrew to that in which the cap remains sealed on the bottle.