发明公开
- 专利标题： MAGNETIC PARTICLES, SUBSTRATE COMPRISING SUCH PARTICLES, SECURITY DOCUMENT AND METHOD FOR DETECTING SUCH PARTICLES
- 专利标题（中）： 磁性颗粒等基材粒的安全文件和方法在确定该粒子
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申请号： EP97954829.0申请日： 1997-12-12
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公开(公告)号： EP0897569A2公开(公告)日： 1999-02-24
- 发明人: DOUBLET, Pierre , ROBERTSON, Paul, Andrew , FISHER, John , BURRELL, Jonathan
- 申请人： ARJO WIGGINS S.A. , N.V. BEKAERT S.A.
- 申请人地址： 117 quai du Président Roosevelt 92130 Issy-les-Moulineaux FR
- 专利权人： ARJO WIGGINS S.A.,N.V. BEKAERT S.A.
- 当前专利权人： ARJO WIGGINS S.A.,N.V. BEKAERT S.A.
- 当前专利权人地址： 117 quai du Président Roosevelt 92130 Issy-les-Moulineaux FR
- 代理机构： Leszczynski, André
- 优先权： EP19960203529 19961212; EP19960402721 19961212
- 国际公布： WO1998026379 19980618
- 主分类号： H01F1
- IPC分类号： H01F1 ; B42D15 ; G01R33 ; G06K7 ; G07D7 ; G07F7 ; B42D107
摘要：
The present invention relates to a method and an apparatus for detecting the presence of particles in a substrate the base material of which has electromagnetic properties substantially differing from the corresponding electromagnetic properties of the particles. The invention also relates to the particles and to the substrate comprising such particles which allow to recognise easily a document as being a genuine security document in order to prevent the document from being copied or in order to contribute to its authentication.
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