Patent ID: 9183421
Filing Date: 2015-11-10
Classification: G06K,G07D,H01F

Abstract:
1. A checking arrangement adapted to check a value document having a security element when the value document moves along a transport path having a first section, the security element having a high-coercive magnetic region of a first coercive field strength, the checking arrangement comprising: a first magnetization device for magnetizing the security element, the first magnetization device comprising a first magnet-pair device and a second magnet-pair device along the transport path; a detector device for the detection of magnetic signals that emanate from the security element, the detector device comprising a first magnetic detector and a second magnetic detector for respectively detecting first and second magnetic signals of the security element; and a second magnetization device for providing a further magnetic field to act on the security element after detection of the first magnetic signal and before or concurrent with detection of the second magnetic signal, the detector device and the second magnetization device being positioned after the first and second magnet-pair devices along the transport path; wherein the first and second magnet-pair devices respectively produce first and second magnetic fields having first and second magnetic field strengths, the first and second magnet-pair devices being arranged along the transport path adjacent to each other such that a composite magnetic field occurs at the first section along the transport path due to interaction between the first and second magnetic fields, the composite magnetic field having a composite magnetic field strength which is greater than either of the first or second magnetic field strength, and wherein the composite magnetic field strength is greater than the first coercive field strength such that the high-coercive magnetic region of the security element is magnetized when the security element is at the first section of the transport path.