Electronic article surveillance system having enhanced tag deact

Details Electronic article surveillance system having enhanced tag deact Electronic article surveillance system having enhanced tag deact

1994-08-10

1995-11-21

Swann, Glen

Communications: electrical

Condition responsive indicating system

Specific condition

G08B 1324

Patent

active

054691427

ABSTRACT:
An electronic article surveillance tag deactivation system includes a transmitter, a receiver, a deactivation coil and a controller (microprocessor) for establishing time periods for operation of the transmitter, the receiver and the deactivation coil, and for selectively varying detection sensitivity of the receiver. Detection of a tag prior to deactivation is effected with the receiver at low sensitivity and redetection of the tag subsequent to deactivation is effected with the receiver at high sensitivity.

REFERENCES:
patent: 3938044 (1976-02-01), Lichtblau
patent: 4476459 (1984-10-01), Cooper et al.
patent: 4881061 (1989-11-01), Chambers

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