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Patent EP0353040A2 successfully refreshed from Google Patents.
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EP0353040A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Electromagnetic identification system

Assignee: Central Research Laboratories Ltd
•
Filing: 1989-07-26
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Granted: —
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Expires: 2009-07-26
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Abstract

Abstract A tag 2 for use in an electronic article surveillance system comprises a magnetically structured component 4 in close proximity to a striplike element 6 of magnetically soft material. The component 4 includes magnetic particles 8 orientated into particular directions in regions 10, 12, preferably at ± 45 o relative to the longitudinal axis of the tag. The tag 2 can be deactivated by longitudinal wiping with a deactivator providing a magnetic field corresponding to the angle of orientation of the particles 8. Deactivation is, therefore, straightforward for a check out operator but not for a potential thief. The orientated particles 8 can be used to define an interpretable code enabling product inventory with deactivation.

Inventors

  • 👤 Andrew Laurence Smith

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-31 13:23
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/22; G08B13/24; G08B13/2402; G08B13/2405; G08B13/2408; G08B13/2411; G06; G06K; G06K19/00; G06K19/02; G06K19/06; G06K19/06187; G08B13/2414; G08B13/2417; G08B13/2428; G08B13/2437; G08B13/2442

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 76 words
A tag for use in an electromagnetic identification system comprises an element of magnetically soft material and, in sufficiently close magnetic communication therewith for permitting local magnetic polarisation of the element, a magnetically structured component comprising, in a first region thereof, magnetic particles, having their magnetic axes orientated in a first direction, and in a further region thereof, magnetic particles having their magnetic axes not generally orientated in any direction or orientated in a further direction.
Claim 2
Dependent Claim 76 words
A tag for use in an electromagnetic identification system comprises an element of magnetically soft material and, in sufficiently close magnetic communication therewith for permitting local magnetic polarisation of the element, a magnetically structured component comprising, in a first region thereof, magnetic particles, having their magnetic axes orientated in a first direction, and in a further region thereof, magnetic particles having their magnetic axes not generally orientated in any direction or orientated in a further direction.
Claim 3
Dependent Claim 39 words
A tag according to Claim 1 wherein the axes of the magnetic particles in the first region are orientated at an angle of substantially 90 o with respect to the axes of the magnetic particles in the further region.
Claim 4
Dependent Claim 44 words
A tag according to Claim 1 or Claim 2 wherein the magnetically structured component is of strip form and the magnetic axes of the magnetic particles in the first and or further regions are orientated in a direction other than longitudinally of the strip.
Claim 5
Dependent Claim 37 words
A tag according to Claim 3 wherein the magnetic axes of the magnetic particles in the first and or further regions are orientated at an angle of substantially 45 o to the longitudinal axis of the strip.
Claim 6
Dependent Claim 29 words
A tag according to any one of Claims 1 to 4 wherein the magnetic particles in the first and or further regions are arranged to define an interpretable code.
Claim 7
Dependent Claim 25 words
A tag according to any one of the preceding claims wherein the magnetically structured component is arranged to overlie the element of magnetically soft material.
Claim 8
Dependent Claim 17 words
A tag according to any one of the preceding claims wherein the magnetic particles comprise acicular particles.

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