DEVICE FOR DETECTING MAGNETICALLY MARKED PAPER AND MARKED PAPER DETECTABLE BY SAID DEVICE

The invention relates to a marked paper document and a marked paper document detection device. The device comprises excitation means (A1, A2, A3) for varying the magnetization of glass-covered amorphous ferromagnetic filaments contained in the marked paper document with time, and means for detecting...

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Bibliographic Details
Main Authors ACHER, OLIVIER, LEDIEU, MARC, JOUBERT, JEAN-CLAUDE
Format Patent
LanguageEnglish
French
German
Published 07.04.2004
Edition7
Subjects
ALARM SYSTEMS
DETECTING MASSES OR OBJECTS
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
ORDER TELEGRAPHS
PHYSICS
SIGNALLING
SIGNALLING OR CALLING SYSTEMS
TESTING
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Summary:The invention relates to a marked paper document and a marked paper document detection device. The device comprises excitation means (A1, A2, A3) for varying the magnetization of glass-covered amorphous ferromagnetic filaments contained in the marked paper document with time, and means for detecting a variation in the magnetization of the ferromagnetic filaments. The invention is applicable to checking reproduction of documents and authentication of documents.
Bibliography:Application Number: EP20010947524