US4935724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
EAS tag with magnetically structured control element
Assignee: Central Research Laboratories Ltd
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Filing: 1989-07-27
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Granted: 1990-06-19
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Expires: 2009-07-27
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° 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 L. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:09
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 comprising 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 comprising 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
38 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° with respect to the axes of the magnetic particles in the further region.
Claim 4
Dependent Claim
41 words
A tag according to claim 1 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
36 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° to the longitudinal axis of the strip.
Claim 6
Dependent Claim
24 words
A tag according to claim 1 wherein the magnetic particles in the first and or further regions are arranged to define an interpretable code.
Claim 7
Dependent Claim
21 words
A tag according to claim 1 wherein the magnetically structured component is arranged to overlie the element of magnetically soft material.
Claim 8
Dependent Claim
13 words
A tag according to claim 1 wherein the magnetic particles comprise acicular particles.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-18 | 1993-12-18 | 1994-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-18 | 1997-12-18 | 1998-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-18 | 2001-12-18 | 2002-06-19 | $7700.00 | Window Closed / Lapsed |