Ferromagnetic element for use in a marker in a magnetomechanical electronic article surveillance system
US7026938B2 · kind B2 · utility
6Cited by
13References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 23, 2004 |
| Grant date | Apr 11, 2006 |
| Priority date | — |
| Expiry date | Apr 23, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4902
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A ferromagnetic element for use in a marker in a magnetomechanical electronic article surveillance system has improved magnetoresonant properties and/or reduced eddy current losses by virtue of having a fine domain structure having a maximum width of 1.5 times the thickness of the element and oriented transverse to the element axis, and an induced magnetic easy axis substantially perpendicular to the element axis, and having a hysteresis loop that is linear up to a magnetic field substantially equal to a magnetic field that ferromagnetically saturates the ferromagnetic element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.