Printed bias magnet for electronic article surveillance marker

G - Physics – 08 – B

Patent

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Details

G08B 13/14 (2006.01) G08B 13/24 (2006.01) H01F 41/16 (2006.01)

Patent

CA 2449832

An EAS marker has a paintable or printable bias magnet material (56), which is either directly painted onto the EAS marker (55,65) or first placed onto a substrate material (58), which is then placed into the EAS marker. The material includes a magnetic powder mixed with resin and solvent. This "bias paint" is then applied onto the EAS marker. The magnetic powder, resin, and solvent provide a very dense layer after drying, which has a magnetic material density that is usually lower than a rolled product, but is higher than that of the injection-molded magnet material. Printing the bias magnet allows nondeactivatable magnetomechanical EAS markers to be made using web-based mass production methods.

L'invention concerne un marqueur EAS comprenant un matériau magnétique de polarisation (56) pouvant être peint ou imprimé. Le matériau magnétique de polarisation est directement peint sur le marqueur EAS (55, 56) ou placé d'abord sur un matériau substrat (58) avant d'être disposé dans le marqueur EAS. Le matériau comprend une poudre magnétique mélangée avec de la résine et du solvant. Cette "peinture de polarisation" est ensuite appliquée sur le marqueur EAS. La poudre magnétique, la résine et le solvant donnent, après séchage, une couche très dense présentant une densité du matériau magnétique généralement inférieure à celle d'un produit laminé, mais supérieure à celle d'un matériau magnétique moulé par injection. L'impression de l'aimant de polarisation permet de fabriquer des marqueurs EAS magnéto-mécaniques non désactivables par des méthodes de production en série en ligne.

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