CA2344709A1 - Far field magnet resensitizer apparatus for use with article surveillance systems - Google Patents
Far field magnet resensitizer apparatus for use with article surveillance systems Download PDFInfo
- Publication number
- CA2344709A1 CA2344709A1 CA002344709A CA2344709A CA2344709A1 CA 2344709 A1 CA2344709 A1 CA 2344709A1 CA 002344709 A CA002344709 A CA 002344709A CA 2344709 A CA2344709 A CA 2344709A CA 2344709 A1 CA2344709 A1 CA 2344709A1
- Authority
- CA
- Canada
- Prior art keywords
- article surveillance
- marker
- surveillance systems
- magnet array
- resensitizer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003550 marker Substances 0.000 abstract 3
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000005347 demagnetization Effects 0.000 abstract 1
- 230000009977 dual effect Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
- G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
- G08B13/2408—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using ferromagnetic tags
- G08B13/2411—Tag deactivation
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Computer Security & Cryptography (AREA)
- Burglar Alarm Systems (AREA)
Abstract
A demagnetization apparatus for use with magnetically based electronic article surveillance systems having a dual status anti-theft marker containing at least one demagnetizable control element which when demagnetized allows the marker to be detected by the system when the marker is present in an interrogation zone. The apparatus includes an array of magnets contained within a housing which exhibits a succession of fields of alternate polarity and at least a portion of which exhibits exponentially decreasing intensities along a plurality of paths at distances above the working surface of the housing along that portion of the magnet array. The magnet array is configured and arranged such that the external field is sufficient to demagnetize the demagnetizable element of the markers that pass along paths at varying distances from the magnet array.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US17066798A | 1998-10-13 | 1998-10-13 | |
| US09/170,667 | 1998-10-13 | ||
| PCT/US1999/003635 WO2000022587A1 (en) | 1998-10-13 | 1999-02-19 | Far field magnet resensitizer apparatus for use with article surveillance systems |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2344709A1 true CA2344709A1 (en) | 2000-04-20 |
| CA2344709C CA2344709C (en) | 2008-12-30 |
Family
ID=22620805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002344709A Expired - Fee Related CA2344709C (en) | 1998-10-13 | 1999-02-19 | Far field magnet resensitizer apparatus for use with article surveillance systems |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP1119833B1 (en) |
| JP (1) | JP2002527837A (en) |
| KR (1) | KR20010083887A (en) |
| AU (1) | AU2688299A (en) |
| BR (1) | BR9914407A (en) |
| CA (1) | CA2344709C (en) |
| DE (1) | DE69908392T2 (en) |
| HK (1) | HK1039199A1 (en) |
| WO (1) | WO2000022587A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20240008748A (en) | 2022-07-12 | 2024-01-19 | 엄태형 | Balcony railing |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4499444A (en) * | 1983-05-20 | 1985-02-12 | Minnesota Mining And Manufacturing Company | Desensitizer for ferromagnetic markers used with electromagnetic article surveillance systems |
| US4752758A (en) * | 1986-07-21 | 1988-06-21 | Minnesota Mining And Manufacturing Company | Demagnetization apparatus for magnetic markers used with article surveilliance systems |
| US4689590A (en) * | 1986-07-21 | 1987-08-25 | Minnesota Mining And Manufacturing Company | Demagnetization apparatus for magnetic markers used with electromagnetic article surveillance systems |
| US5187462A (en) * | 1990-02-15 | 1993-02-16 | Minnesota Mining And Manufacturing Company | Multiple magnet assembly for use with electromagnetic article surveillance markers |
| US5225807A (en) * | 1991-09-16 | 1993-07-06 | Knogo Corporation | Method and apparatus for sensitizing and desensitizing targets for electronic article surveillance systems |
| US5285182A (en) * | 1992-09-03 | 1994-02-08 | Minnesota Mining And Manufacturing Company | Desensitizing apparatus for electromagnetic article surveillance system |
| US5594420A (en) * | 1995-02-02 | 1997-01-14 | Sensormatic Electronics Corporation | Rotating magnet array for deactivating EAS markers |
-
1999
- 1999-02-19 KR KR1020017004296A patent/KR20010083887A/en not_active Application Discontinuation
- 1999-02-19 JP JP2000576422A patent/JP2002527837A/en active Pending
- 1999-02-19 WO PCT/US1999/003635 patent/WO2000022587A1/en not_active Application Discontinuation
- 1999-02-19 EP EP99907155A patent/EP1119833B1/en not_active Expired - Lifetime
- 1999-02-19 BR BR9914407-7A patent/BR9914407A/en not_active Application Discontinuation
- 1999-02-19 AU AU26882/99A patent/AU2688299A/en not_active Abandoned
- 1999-02-19 CA CA002344709A patent/CA2344709C/en not_active Expired - Fee Related
- 1999-02-19 DE DE69908392T patent/DE69908392T2/en not_active Expired - Fee Related
-
2001
- 2001-12-20 HK HK01108953A patent/HK1039199A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| WO2000022587A1 (en) | 2000-04-20 |
| DE69908392D1 (en) | 2003-07-03 |
| CA2344709C (en) | 2008-12-30 |
| BR9914407A (en) | 2001-06-26 |
| HK1039199A1 (en) | 2002-04-12 |
| JP2002527837A (en) | 2002-08-27 |
| EP1119833A1 (en) | 2001-08-01 |
| KR20010083887A (en) | 2001-09-03 |
| DE69908392T2 (en) | 2003-11-27 |
| AU2688299A (en) | 2000-05-01 |
| EP1119833B1 (en) | 2003-05-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |