Title: Security bottle closure device

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Abstract: A closure device with a guarantee seal for bottles of the type having a screw thread and a radial shoulder, formed as by a collar or thickened portion, on the neck thereof is disclosed. The closure device comprises a cap with an elongate skirt to the rim of which is connected, by a frangible connection, a tubular anchoring member which carries a plurality of axially extending resilient tongues which, when the device is in position, latch under the radial shoulder to prevent removal of the anchoring member. The cap itself thus cannot be removed without breaking the guarantee seal formed by the frangible connection between the skirt of the cap and the anchoring member. To prevent breakage of the frangible connection while the closure device is being fitted the inner face of the skirt and the outer faces of the tongues are provided with cooperating ribs and grooves so that torque can be transmitted directly from the cap to the tongues, bypassing the frangible connection.


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