发明名称 |
SECURITY DEVICES FOR SECURITY DOCUMENTS |
摘要 |
The invention relates to improvements in security devices for security documents. A security device comprises at least one at least partially light transmitting spacer layer, on one side of which are formed first indicia. The first indicia comprise a plurality of repeating elements and are formed from a material which emits a coloured visible light when excited by a form of radiation. On an opposing side of the spacer layer is an absorbing material, which absorbs the said radiation but not visible light. The absorbing material is applied in a pattern comprising a plurality of repeating elements similar to the elements of the first indicia and having gaps between the elements. |
申请公布号 |
CA2763556(C) |
申请公布日期 |
2015.03.10 |
申请号 |
CA20102763556 |
申请日期 |
2010.05.26 |
申请人 |
DE LA RUE INTERNATIONAL LIMITED |
发明人 |
LISTER, ADAM |
分类号 |
B41M3/14;B42D15/00;D21H21/48;G07D7/00 |
主分类号 |
B41M3/14 |
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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