Method and apparatus for deactivating magnetic targets
US5126720A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 1991 |
| Grant date | Jun 30, 1992 |
| Priority date | — |
| Expiry date | Jan 17, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/2411
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Articles of merchandise (42) which contain deactivatable theft detection targets (44) have their targets deactivated by passing them through a box-like apparatus (30) made of low coercive force, high saturation induction material with a multiplicity of permament magnets (48) on its inside surfaces so as to generate magnetic fields which extend at different directions and at decreasing intensities from one end of the apparatus to the other so that irrespective of a target's orientation while passing through the apparatus, the target's magnetic deactivation slugs or elements will encounter a magnetizing field along the target's length sufficient to magnetize the elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.