0794520-A1 is referenced by 5 patents and cites 1 patents.

A security tag (10) used with an electronic article surveillance system for detecting the presence of the tag (10) within a surveilled area utilizing electromagnetic energy at a frequency within a predetermined detection frequency range includes a dielectric substrate having first (16) and second opposing principal surfaces, a peripheral outer edge (20), and a resonant circuit capable of resonating at a frequency within the predetermined detection frequency range. The security tag (10) also includes a guard member (36), in one embodiment a discontinuous conductive member, effectively electrically isolated from the resonant circuit, extending along at least a portion of the peripheral outer edge (20) of the substrate for surrounding at least a portion of the resonant circuit.; The guard member (36) electrically isolates the resonant circuit to facilitate testing of the resonant circuit during an early stage of the manufacturing process when the resonant circuit is web form.

Title
Security tag
Application Number
EP19970102358 19970213
Publication Number
0794520 (A1)
Application Date
February 13, 1997
Publication Date
September 10, 1997
Inventor
Rankin Mark James
US
Piccoli Anthony Frank
US
Peirce Roger Jay
US
Mazoki Gary Thomas
US
Bonnin Luis Francisco Soler
US
Appalucci Lawrence
US
Assignee
Checkpoint Systems
US
IPC
G08B 13/24
H01F 05/00
G08B 13/24
H01F 05/00
G08B 13/24
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