Deactivatable radio frequency security label

Details Deactivatable radio frequency security label Deactivatable radio frequency security label

2005-07-19

2005-07-19

Goins, Davetta W. (Department: 2632)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S572200, C340S572300, C343S741000

Reexamination Certificate

active

06919806

ABSTRACT:
A deactivation apparatus for an electronic article surveillance tag having a plurality of layers and an equivalent resonant circuit containing an inductor and a capacitor is provided. The apparatus includes: a capacitor formed by a pair of conductive capacitor plates separated apart by a dielectric layer; an inductor connected to each of the pair of capacitor plates where an electromagnetic field of a preselected frequency at a first magnitude impinging upon the tag causes the equivalent resonant circuit to resonate and produce a detectable response from the tag; and, an electrically weakened area in the dielectric layer between the pair of conductive capacitor plates where the electromagnetic field at a second magnitude higher than the first magnitude impinging upon the tag causes a conductive path through the weakened area electrically connecting the pair of capacitor plates together and deactivating the tag.

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patent: 6480110 (2002-11-01), Lee et al.
patent: 6549132 (2003-04-01), Parrotta et al.

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