Patent ID: 6264052
Filing Date: 2001-07-24
Classification: B65D

Abstract:
A screw cap made of plastic for bottles with a stop ring on the neck, comprising a cap body with an internal thread and a tamperproof strip with flanges arranged on the interior surface thereof, the tamperproof strip being non-breakable and connected to the cap body by webs in which, as the screw-cap is unthreaded from the bottle, tension is increased causing the fracture, and which has an expansion means with at least one permanent connection provided in the area of the expansion means between the tamperproof strip and the cap body,whereinthe expansion means, as the cap body is threaded onto the bottle, uniformly expands the tamperproof strip along its entire width in a radial direction in such a way that the flanges slip past the stop ring, andsaid expansion means has at least two recesses which extend substantially transversely along the inside of the tamperproof strip and which are open-ended at opposite edges, respectively, of said tamperproof strip.