Method and device for the activation of large quantities of security elements for the electronic article protection
View Patent ↗A method and device for activation of large quantities of security elements for the electronic article protection. The security elements are exposed to at least one magnetic field produced by one or more coils carrying a line current subjected to sine oscillations. The coils are supplied with current pulses that are shorter than the sine oscillations. The amplitude of the current pulses diminishes as a function of time.
1. A method for the activation of large quantities of security elements for the electronic article protection, wherein the security elements are exposed to at least one magnetic field produced by at least one coil carrying a line current subjected to sine oscillations, the at least one coil is supplied with current pulses that are shorter than the sine oscillations, and the amplitude of the current pulses diminish as a function of time and wherein several successive ones of the current pulses have the same polarity, before a change of polarity of the current pulses occurs.
2. The method of claim 1 wherein ones of the current pulses with a positive polarity originate from positive half-waves of the line current, and ones of the current pulses with a negative polarity are taken from negative half-waves of the line current.
3. The method of claim 1 wherein the function of time is elliptical or linear function of time.
4. The method of claim 1 wherein the security elements are exposed to a plurality of differently directed magnetic fields produced by a plurality of coils.
5. The method of claim 4 wherein the coils are arranged such that the produced magnetic fields are orthogonal to one another.
6. The method of claim 4 wherein the produced magnetic fields act in succession on the security elements.
7. The method of claim 1 wherein the current pulses are provided by power-electronic circuits using power semiconductors.
8. The method of claim 7 wherein the power semiconductors are thyristors.
9. The method of claim 7 wherein the power semiconductors are insulated gate transistors.
10. A method for the activation of large quantities of security elements for the electronic article protection, wherein the security elements are exposed to at least one magnetic field produced by at least one coil carrying a line current subjected to sine oscillations, the at least one coil is supplied with current pulses that are shorter than the sine oscillations, and several successive ones of the current pulses have the same polarity before a change of polarity of the current pulses occurs.
11. The method of claim 10 wherein the function of time is an elliptical or linear function of time.
12. The method of claim 10 wherein ones of the current pulses with a positive polarity originate from positive half-waves of the line current, and ones of the current pulses with a negative polarity are taken from negative half-waves of the line current.
13. The method of claim 10 wherein the security elements are exposed to a plurality of differently directed magnetic fields produced by a plurality of coils.
14. The method of claim 13 wherein the coils are arranged such that the produced magnetic fields are orthogonal to one another.
15. The method of claim 13 wherein the produced magnetic fields act in succession on the security elements.
16. The method of claim 10 wherein the current pulses are provided by power-electronic circuits using power semiconductors.
17. The method of claim 16 wherein the power semiconductors are thyristors.
18. The method of claim 16 wherein the power semiconductors are insulated gate transistors.
19. A method for the activation of large quantities of security elements for the electronic article protection, wherein the security elements are exposed to at least one magnetic field produced by at least one coil carrying a line current subjected to sine oscillations, the at least one coil is supplied with current pulses that are shorter than the sine oscillations, and the amplitude of the current pulses diminishes as a function of an elliptical or linear function of time, and wherein several successive ones of the current pulses have the same polarity, before a change of polarity of the current pulses occurs.
20. The method of claim 19 wherein ones of the current pulses with a positive polarity originate from positive half-waves of the line current, and ones of the current pulses with a negative polarity are taken from negative half-waves of the line current.
21. The method of claim 19 wherein the security elements are exposed to a plurality of differently directed magnetic fields produced by a plurality of coils.
22. The method of claim 21 wherein the coils are arranged such that the produced magnetic fields are orthogonal to one another.
23. The method of claim 21 wherein the produced magnetic fields act in succession on the security elements.
24. The method of claim 19 wherein the current pulses are provided by power-electronic circuits using power semiconductors.
25. The method of claim 24 wherein the power semiconductors are thyristors.
26. The method of claim 24 wherein the power semiconductors are insulated gate transistors.
27. A method for the activation of large quantities of security elements for the electronic article protection, wherein the security elements are exposed to at least one magnetic field produced by at least one coil carrying a line current subjected to sine oscillations, the at least one coil is supplied with current pulses that are shorter than the sine oscillations, wherein several successive ones of the current pulses have the same polarity, before a change of polarity of the current pulses occurs and wherein ones of the current pulses with a positive polarity originate from positive half-waves of the line current, and ones of the current pulses with a negative polarity are taken from negative polarity are taken from negative half-waves of the line current.
28. The method of claim 27 wherein the amplitude of the current pulses diminishes as a function of time.
29. The method of claim 28 wherein the function of time is an elliptical or linear function of time.
30. The method of claim 27 wherein the security elements are exposed to a plurality of differently directed magnetic fields produced by a plurality of coils.
31. The method of claim 30 wherein the coils are arranged such that the produced magnetic fields are orthogonal to one another.
32. The method of claim 30 wherein the produced magnetic fields act in succession on the security elements.
33. The method of claim 27 wherein the current pulses are provided by power-electronic circuits using power semiconductors.
34. The method of claim 33 wherein the power semiconductors are thyristors.
35. The method of claim 33 wherein the power semiconductors are insulated gate transistors.
36. A method for the activation of large quantities of security elements for the electronic article protection, wherein the security elements are exposed to a plurality of differently directed magnetic fields produced by a plurality of coils each carrying a line current subjected to sine oscillations and wherein the coils are supplied with current pulses that are shorter than the sine oscillations, the coils being arranged such that the produced magnetic fields are orthogonal to one another, and the produced magnetic fields act in succession on the security elements and wherein several successive ones of the current pulses have the same polarity, before a change of polarity of the current pulses occurs.