Security apparatus for electronic article surveillance tag
US6535130B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2001 |
| Grant date | Mar 18, 2003 |
| Priority date | — |
| Expiry date | Apr 25, 2021 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05B73/0017
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An EAS tag in which the tag is held to an article by an attaching assembly a part of which is releasably prevented from being withdrawn from the body of the tag.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 provides the releasable preventing function and includes jaws specifically adapted to respond to in-plane torsional forces provided by the arcuate probe which is moved through the arcuate channel by rotation to reach the spring clamp. The tag has improved anti-defeat devices and methods including one or more of the following; a shield to protect the EAS sensor, a shield to protect the releasable spring clamp, a tag self-alarm that alarms upon various unauthorized defeat attempts, an LED to signal an armed condition of the tag alarm, a magnet switch to alarm the tag upon exposure to a relatively strong magnetic field, and a plurality of apertures to decoy the position of the alarm piezo.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.