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Coded Surveillance Marker with Improved Biasing.
| Content Provider | The Lens |
|---|---|
| Abstract | A surveillance marker is provided for utilization in antipilferage and anticounterfeiting systems. The marker includes a housing formed of barium ferrite impregnated plastic. Advantageously, the barium ferrite impregnated plastic housing provides a quasi-solenoidal dc magnetic bias field for activating one or more stacked ferromagnetic ribbons contained within the housing to produce an identifiable signal in response to an applied ac magnetic interrogation field. |
| Related Links | https://www.lens.org/images/patent/EP/0214440/B1/EP_0214440_B1.pdf |
| Language | English |
| Publisher Date | 1987-03-18 |
| Access Restriction | Open |
| Alternative Title | Kodiertes Überwachungsetikett Mit Vormagnetisierung. Marqueur De Surveillance Codé Avec Prémagnétisation. |
| Content Type | Text |
| Resource Type | Patent |
| Date Applied | 1986-07-29 |
| Agent | Myerscough, Philip Boyd (gb) |
| Applicant | Allied Corp |
| Application No. | 86110476 |
| Claim | A surveillance marker for utilization in antipilferage, anticounterfeiting and like systems, comprising: ferromagnetic signal producing means; and combined housing and biasing means for said signal producing means formed of plastic impregnated with ferrimagnetic or ferromagnetic powder of relatively high coercivity; said high coercivity powder providing a quasi-solenoidal dc magnetic bias field for activating said ferromagnetic signal producing means to produce an identifiable signal in response to an applied magnetic interrogation field. The surveillance marker recited in Claim 1, wherein said ferromagnetic signal producing means is at least one strip of magnetostrictive ferromagnetic materia The surveillance marker recited in Claim 2, wherein said strip has an amorphous structure. The surveillance marker recited in Claim 1, wherein said ferrimagnetic powder of relatively high coercivity is barium ferrite. The surveillance marker recited in Claim 4, wherein said combined housing and biasing means is from 7% - 25% barium ferrite by volume. The surveillance marker recited in Claim 4, wherein said combined housing and biasing means is approximately 15% - 21% barium ferrite by volume. The surveillance marker recited in Claim 4, wherein said combined housing and biasing means is approximately 17% barium ferrite and 83% ABS plastic by volume. The surveillance marker recited in Claim 1, wherein said ferromagnetic signal producing means is multiple magnetostrictive strips of ferromagnetic material stacked together. |
| CPC Classification | SIGNALLING OR CALLING SYSTEMS;ORDER TELEGRAPHS;ALARM SYSTEMS |
| Extended Family | 088-541-593-775-340 142-822-259-659-974 003-343-970-817-091 053-391-272-037-549 142-461-350-578-541 019-636-962-765-834 |
| Patent ID | 0214440 |
| Inventor/Author | Anderson Philip Marron Reich Ronald Keith |
| IPC | B65C1/00 B42D25/369 B65C11/00 G06K19/10 G08B13/24 |
| Status | Expired |
| Owner | Identitech Corporation |
| Simple Family | 088-541-593-775-340 142-461-350-578-541 142-822-259-659-974 053-391-272-037-549 019-636-962-765-834 003-343-970-817-091 |
| CPC (with Group) | G08B13/2411 G08B13/2434 G08B13/2437 G08B13/2442 G08B13/2448 |
| Issuing Authority | European Patent Office (EPO) |
| Kind | Patent Application Publication (Republication) |
