Patent Number: 6,166,636

Title: Marker for use in a magnetic anti-theft security system and method for making same

Abstract: A marker for employment in a magnetic anti-theft security system is composed of an oblong alarm strip of an amorphous ferromagnetic alloy and at least one activation strip applied onto the alarm strip and composed of a semi-hard magnetic alloy. One or more spatially separated regions that are composed of a non-magnetic phase are introduced into the activation strip with a thermal treatment. The semi-hard magnetic alloy has a coercive force H.sub.c of 15 through 100 A/cm and a remanence B.sub.r of at least 0.8 T.

Inventors: Herget; Matthias (Bruchkobel, DE), Roth; Ottmar (Grundau, DE)

Assignee: Vacuumschmelze GmbH

International Classification: G08B 13/24 (20060101); G08B 013/14 ()

Expiration Date: 12/26/2017