Security tag deactivation system

Details Security tag deactivation system Security tag deactivation system

1986-01-10

1988-03-01

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340527, 340691, G08B 1324

Patent

active

047289384

ABSTRACT:
Security tags which bear a resonant circuit made of conductors on opposite sides of a dielectric are deactivated by applying to a tag sufficiently high RF power at the resonance frequency to produce breakthrough between opposed conductors. A tag presence alert signal is intentionally extended beyond the period of active tag presence detection. During high power operation, the system inhibits other nearby RF deactivating and electronic article surveillance systems. The RF transmissions of all these systems may also be slaved. The high power RF produced by the deactivating system is principally dissipated where it causes no undesirable heating effects.

REFERENCES:
patent: 3828337 (1974-08-01), Lichtblau
patent: 3919704 (1975-11-01), Williams et al.
patent: 3938044 (1976-02-01), Lichtblau
patent: 4117466 (1978-09-01), Lichtblau
patent: 4243980 (1981-01-01), Lichtblau
patent: 4251808 (1981-02-01), Lichtblau
patent: 4498076 (1985-02-01), Lichtblau

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