发明名称 |
TRANSPARENT SECURITY SUBSTRATE WITH MAGNETIC PARTICLES |
摘要 |
The invention relates to improvements in substrates and in particular to new substrates having magnetic and visual security features, which provide security against imitation. A security substrate comprising a transparent polymer carrier layer bearing indicia formed from a plurality of opaque and non-opaque regions and a transparent magnetic layer supported by the carrier layer containing a distribution of particles of a hard magnetic material of a size and distributed in a concentration at which the magnetic layer remains transparent. |
申请公布号 |
EP1497142(A2) |
申请公布日期 |
2005.01.19 |
申请号 |
EP20030722772 |
申请日期 |
2003.04.24 |
申请人 |
DE LA RUE INTERNATIONAL LIMITED |
发明人 |
SNELLING, JAMES PETER;ISHERWOOD, ROLAND;BROWN, ALAN |
分类号 |
B42D15/00;B42D15/10;D21H21/42;D21H21/48;G06K19/06 |
主分类号 |
B42D15/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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