CA1217526A - Desensitizer for ferromagnetic markers used with electromagnetic article surveillance systems - Google Patents
Desensitizer for ferromagnetic markers used with electromagnetic article surveillance systemsInfo
- Publication number
- CA1217526A CA1217526A CA000452597A CA452597A CA1217526A CA 1217526 A CA1217526 A CA 1217526A CA 000452597 A CA000452597 A CA 000452597A CA 452597 A CA452597 A CA 452597A CA 1217526 A CA1217526 A CA 1217526A
- Authority
- CA
- Canada
- Prior art keywords
- gap
- marker
- magnetic
- section
- assembly
- 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.)
- Expired
Links
- 229940090898 Desensitizer Drugs 0.000 title claims abstract description 21
- 230000005294 ferromagnetic effect Effects 0.000 title description 4
- 230000005291 magnetic effect Effects 0.000 claims abstract description 52
- 239000003550 marker Substances 0.000 claims abstract description 45
- 239000000463 material Substances 0.000 claims description 34
- 230000004907 flux Effects 0.000 claims description 19
- 239000003302 ferromagnetic material Substances 0.000 claims description 9
- 230000007423 decrease Effects 0.000 claims description 5
- 230000035699 permeability Effects 0.000 claims description 3
- 239000012141 concentrate Substances 0.000 abstract description 2
- 230000002238 attenuated effect Effects 0.000 abstract 1
- 239000000696 magnetic material Substances 0.000 description 7
- 125000006850 spacer group Chemical group 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 230000005415 magnetization Effects 0.000 description 3
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- KOMIMHZRQFFCOR-UHFFFAOYSA-N [Ni].[Cu].[Zn] Chemical compound [Ni].[Cu].[Zn] KOMIMHZRQFFCOR-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000000586 desensitisation Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- AJCDFVKYMIUXCR-UHFFFAOYSA-N oxobarium;oxo(oxoferriooxy)iron Chemical compound [Ba]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O AJCDFVKYMIUXCR-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000001755 vocal effect Effects 0.000 description 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
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
- G11B23/023—Containers for magazines or cassettes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F13/00—Apparatus or processes for magnetising or demagnetising
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0273—Magnetic circuits with PM for magnetic field generation
- H01F7/0294—Detection, inspection, magnetic treatment
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Automation & Control Theory (AREA)
- Computer Security & Cryptography (AREA)
- General Physics & Mathematics (AREA)
- Burglar Alarm Systems (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US496,554 | 1983-05-20 | ||
| US06/496,554 US4499444A (en) | 1983-05-20 | 1983-05-20 | Desensitizer for ferromagnetic markers used with electromagnetic article surveillance systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1217526A true CA1217526A (en) | 1987-02-03 |
Family
ID=23973148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000452597A Expired CA1217526A (en) | 1983-05-20 | 1984-04-24 | Desensitizer for ferromagnetic markers used with electromagnetic article surveillance systems |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4499444A (en]) |
| EP (1) | EP0129335B1 (en]) |
| JP (1) | JPS59220895A (en]) |
| AU (1) | AU564064B2 (en]) |
| CA (1) | CA1217526A (en]) |
| DE (1) | DE3470621D1 (en]) |
| ZA (1) | ZA843799B (en]) |
Families Citing this family (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4665387A (en) * | 1983-07-13 | 1987-05-12 | Knogo Corporation | Method and apparatus for target deactivation and reactivation in article surveillance systems |
| US4684930A (en) * | 1986-03-18 | 1987-08-04 | Knogo Corporation | Method and apparatus for deactivating targets used in electromagnetic type 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 |
| US4910625A (en) * | 1988-10-11 | 1990-03-20 | Eastman Kodak Company | Article surveillance apparatus and systems for computer data disks |
| US4968972A (en) * | 1989-06-30 | 1990-11-06 | Security Tag Systems, Inc. | Conversion of bias strip in a frequency-dividing-transponder tag into a tripole bar magnet to deactivate the tag |
| US5151843A (en) * | 1989-12-08 | 1992-09-29 | Minnesota Mining And Manufacturing Company | Sensitizer for ferromagnetic markers used with electromagnetic article surveillance systems |
| EP0431745A3 (en) * | 1989-12-08 | 1991-11-21 | Minnesota Mining And Manufacturing Company | Sensitizer for ferromagnetic markers used with electromagnetic article surveillance systems |
| AU629424B2 (en) * | 1989-12-08 | 1992-10-01 | Minnesota Mining And Manufacturing Company | Sensitizer for ferromagnetic markers used with electromagnetic article surveillance systems |
| SE500627C2 (sv) * | 1990-03-20 | 1994-08-01 | Esselte Meto Int Gmbh | Handscanner anordnad att optiskt avläsa en streckkod på en vara |
| 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 |
| KR100327296B1 (ko) * | 1994-03-10 | 2002-06-28 | 스프레이그 로버트 월터 | 전자물품감시시스템의자기마커를비활동화시키는장치 |
| US5534836A (en) * | 1994-11-28 | 1996-07-09 | Sensormatic Electronics Corporation | Deactivator for theft-deterrent markers |
| US5594420A (en) * | 1995-02-02 | 1997-01-14 | Sensormatic Electronics Corporation | Rotating magnet array for deactivating EAS markers |
| US5777884A (en) * | 1995-10-16 | 1998-07-07 | Minnesota Mining And Manufacturing Company | Article inventory tracking and control system |
| US5625339A (en) * | 1996-01-08 | 1997-04-29 | Minnesota Mining And Manufacturing Company | Apparatus for changing the status of magnetic markers in an electronic article surveillance system |
| DE19628722A1 (de) * | 1996-07-17 | 1998-01-22 | Esselte Meto Int Gmbh | Vorrichtung zum Deaktivieren eines Sicherungselementes für die elektronische Artikelsicherung |
| US6002335A (en) * | 1998-02-18 | 1999-12-14 | 3M Innovative Properties Company | Small magnet resensitizer apparatus for use with article surveillance systems |
| EP0951000A3 (de) * | 1998-04-17 | 2000-06-21 | Meto International GmbH | Vorrichtung zum Deaktivieren eines Sicherungselementes für die elektronische Artikelsicherung |
| DE19831415A1 (de) * | 1998-04-17 | 1999-10-21 | Meto International Gmbh | Vorrichtung zum Deaktivieren eines Sicherungselementes für die elektronische Artikelsicherung |
| US6424262B2 (en) * | 1998-08-14 | 2002-07-23 | 3M Innovative Properties Company | Applications for radio frequency identification systems |
| JP2002527837A (ja) * | 1998-10-13 | 2002-08-27 | ミネソタ マイニング アンド マニュファクチャリング カンパニー | 物品監視システムとともに使用する遠界磁石の再感応化装置 |
| US6783070B2 (en) * | 2001-01-02 | 2004-08-31 | Ronald L. Faria | Scaneze check-in-check-out library workstation |
| US20040069851A1 (en) * | 2001-03-13 | 2004-04-15 | Grunes Mitchell B. | Radio frequency identification reader with removable media |
| JP2006195955A (ja) * | 2004-12-13 | 2006-07-27 | Lintec Corp | 磁気検知タグの再生方法、及び磁気検知タグの再生装置 |
| CN109494043B (zh) * | 2019-01-05 | 2024-08-20 | 湖南省三联磁电设备有限公司 | 一种充磁间隙可调节的充磁装置 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3781661A (en) * | 1966-03-02 | 1973-12-25 | E Trikilis | Magnetic material and method of producing same |
| US3665449A (en) * | 1969-07-11 | 1972-05-23 | Minnesota Mining & Mfg | Method and apparatus for detecting at a distance the status and identity of objects |
| US4075618A (en) * | 1976-07-15 | 1978-02-21 | Minnesota Mining And Manufacturing Company | Magnetic asymmetric antipilferage marker |
| GB1575680A (en) * | 1976-11-16 | 1980-09-24 | Tokyo Shibaura Electric Co | Tape recording apparatus including a multipolar erasing head and a manufacturing method for a multipolar erasing head |
| DE3014667A1 (de) * | 1980-04-16 | 1981-10-29 | Werner A. 4300 Essen Reiter | Verfahren zum deaktivieren eines sicherungsstreifen s sowie deaktivator und sicherungsstreifen |
| DE3015811A1 (de) * | 1980-04-24 | 1981-10-29 | Elan-Schaltelemente Kurt Maecker Gmbh, 4040 Neuss | Verfahren zum deaktivieren eines sicherungsstreifens sowie deaktivator und sicherungsstreifen |
| US4378582A (en) * | 1981-12-21 | 1983-03-29 | International Jensen Incorporated | Demagnetizing apparatus |
-
1983
- 1983-05-20 US US06/496,554 patent/US4499444A/en not_active Expired - Lifetime
-
1984
- 1984-04-24 CA CA000452597A patent/CA1217526A/en not_active Expired
- 1984-05-17 DE DE8484303364T patent/DE3470621D1/de not_active Expired
- 1984-05-17 EP EP84303364A patent/EP0129335B1/en not_active Expired
- 1984-05-18 ZA ZA843799A patent/ZA843799B/xx unknown
- 1984-05-18 JP JP59100345A patent/JPS59220895A/ja active Granted
- 1984-05-18 AU AU28361/84A patent/AU564064B2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| JPH042995B2 (en]) | 1992-01-21 |
| AU2836184A (en) | 1984-11-22 |
| US4499444A (en) | 1985-02-12 |
| JPS59220895A (ja) | 1984-12-12 |
| ZA843799B (en) | 1986-01-29 |
| DE3470621D1 (en) | 1988-05-26 |
| EP0129335B1 (en) | 1988-04-20 |
| EP0129335A1 (en) | 1984-12-27 |
| AU564064B2 (en) | 1987-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1217526A (en) | Desensitizer for ferromagnetic markers used with electromagnetic article surveillance systems | |
| US4075618A (en) | Magnetic asymmetric antipilferage marker | |
| US4689590A (en) | Demagnetization apparatus for magnetic markers used with electromagnetic article surveillance systems | |
| CA2021792C (en) | Multi-directionally responsive, dual-status, magnetic article surveillance marker having continuous keeper | |
| US4967184A (en) | Computer disk with security protection | |
| US4746908A (en) | Dual-status, magnetically imagable article surveillance marker | |
| US4752758A (en) | Demagnetization apparatus for magnetic markers used with article surveilliance systems | |
| JPS6043793A (ja) | タ−ゲツトの不作動化及び再作動化方法及び装置 | |
| US4811000A (en) | Article enclosure with magnetic marker deactivating means | |
| US5285182A (en) | Desensitizing apparatus for electromagnetic article surveillance system | |
| EP0749621B1 (en) | Deactivating device for magnetic markers in an electronic article surveillance system | |
| US5187462A (en) | Multiple magnet assembly for use with electromagnetic article surveillance markers | |
| JPH08510853A (ja) | 持続性を有する集合型物品監視マーカー | |
| US5151843A (en) | Sensitizer for ferromagnetic markers used with electromagnetic article surveillance systems | |
| EP0431745A2 (en) | Sensitizer for ferromagnetic markers used with electromagnetic article surveillance systems | |
| JPH0621110Y2 (ja) | テ−プカセツト | |
| HK1014286B (en) | Deactivating device for magnetic markers in an electronic article surveillance system | |
| JP2002527837A (ja) | 物品監視システムとともに使用する遠界磁石の再感応化装置 | |
| GB1559119A (en) | Magnetic recording medium with highly anisotropic particles |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |