SECURITY APPARATUS FOR ELECTRONIC ARTICLE SURVEILLANCE TAG

摘要

An EAS tag (100) in which the tag is held to an article by an attaching assembly a part of shich is releasably prevented from being withdrawn from the body of the tag. The tag body is provided with an arcuate channel through which an arcuate detacher probe can be guided for releasing the attaching assembly part. A spring clamp (6) provides the releasable preventing function and includes jaws specifically adapted to respond to in-plane tortional forces provided by the arcuate probe which is moved through the arcuate channel by rotation to reach the spring clamp (6). The tag has improved anti-defeat devices and methods including one or more of the following; a shield (106) to protect the EAS sensor (5), a shield (108) to protect the releasable spring clamp (6), and a tag self-alarm that alarms upon various unauthorized defeat attempts.