Field creation in a magnetic electronic article surveillance...

Details Field creation in a magnetic electronic article surveillance... Field creation in a magnetic electronic article surveillance...

2005-06-07

2005-06-07

Lee, Diane I. (Department: 2876)

Registers

Coded record sensors

Particular sensor structure

C340S572100

Reexamination Certificate

active

06902110

ABSTRACT:
In general, the invention is directed to techniques for creating and controlling a magnetic field for use with electronic article surveillance (EAS) markers. In particular, the techniques make use of current switching devices to generate a signal having one or more current pulses for creating the magnetic field. An electronic article surveillance (EAS) system includes a coil to create a magnetic field for changing a status of an EAS marker and a drive unit to output a signal having one or more current pulses for energizing the coil. A programmable processor within the EAS system controls the drive unit to generate the output signal according to a desired profile. By selectively activating and deactivating current switching devices within the drive unit, the processor can direct the drive unit to generate the output signal according to a desired profile having a number of current pulses of different amplitudes and direction.

REFERENCES:
patent: 5049857 (1991-09-01), Plonsky et al.
patent: 5341125 (1994-08-01), Plonsky et al.
patent: 5493275 (1996-02-01), Easter
patent: 5625339 (1997-04-01), Zarembo et al.
patent: 5680106 (1997-10-01), Schrott et al.
patent: 5781111 (1998-07-01), Easter et al.
patent: 5805065 (1998-09-01), Schwarz et al.
patent: 5844485 (1998-12-01), Ryan, Jr.
patent: 5907465 (1999-05-01), Easter
patent: 5926095 (1999-07-01), Ho et al.
patent: 6002335 (1999-12-01), Zarembo et al.
patent: 6057763 (2000-05-01), Brace et al.
patent: 6169483 (2001-01-01), Ghaffari et al.
patent: 6181249 (2001-01-01), Maitin et al.
patent: 6362737 (2002-03-01), Rodgers et al.
patent: 6486782 (2002-11-01), Zarembo et al.
patent: 6696951 (2004-02-01), Belka et al.
patent: 6742709 (2004-06-01), Blake et al.
patent: 6778087 (2004-08-01), Belka et al.
patent: 2003/0001740 (2003-01-01), Belka et al.

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