Method and an apparatus for determining the genuineness of a security blank

A security blank includes a sheet, and an elongated security thread connected to the sheet. The security thread may be identified upon being irradiated by electromagnetic radiation by a recognizable signature from radiation scattered therefrom; the cross-section of the security thread is other than...

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Bibliographische Detailangaben
Hauptverfasser: HUISER, ANDRE M. J, BALTES, HEINRICH P
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A security blank includes a sheet, and an elongated security thread connected to the sheet. The security thread may be identified upon being irradiated by electromagnetic radiation by a recognizable signature from radiation scattered therefrom; the cross-section of the security thread is other than circular or rectangular and is substantially constant over a prearranged portion of the length thereof.