초록 ▼

This invention relates to a deactivatable tag useable with an electronic article surveillance system and comprised of planar conductive material cut into a pair of inverse, first and second spiral conductors wrapped about each other and positioned for capacitive and inductive coupling. The invention

This invention relates to a deactivatable tag useable with an electronic article surveillance system and comprised of planar conductive material cut into a pair of inverse, first and second spiral conductors wrapped about each other and positioned for capacitive and inductive coupling. The invention also relates to method of making tags wherein conductors are cut from a planar web of conductive material in a continuous process in a manner that the cutting results in the formation of two spiral conductors without accompanying waste of conductive material, and thereafter positioning the conductors to provide resonant circuits.

대표청구항 ▼

Method of making a deactivatable tag for use in an electronic article surveillance system, comprising the steps of: providing a resonant circuit responsive to receipt of a first energy level signal to emit an alarm signal to indicate the presence of the resonant circuit in an interrogation zone, the

Method of making a deactivatable tag for use in an electronic article surveillance system, comprising the steps of: providing a resonant circuit responsive to receipt of a first energy level signal to emit an alarm signal to indicate the presence of the resonant circuit in an interrogation zone, the circuit including an inductor having a spiral conductor, providing an additional conductor, and positioning the additional conductor adjacent the resonant circuit while electrically isolating the additional conductor from the spiral conductor by a normally non-conductive material which can be rendered conductive to deactivate the tag in response to a second energy level signal at an energy level higher than the first energy level signal. Method of deactivating a tag made by the method defined in claim 1, further including the steps of applying the second energy level signal to the tag to render the non-conductive material conductive so that the additional conductor alters the characteristics of the inductor and hence the circuit to prevent the emission of the alarm signal.