发明名称 |
MEHRSCHICHTIGES DOKUMENT. |
摘要 |
A multi-layer document consists of a cover layer (1), a one- or multi-layer carrier layer (2) and optical markings (3) enclosed between the protective layers (1; 2). At least one of the two protective layers (1; 2) is transparent in a predetermined spectral range of light. One or more optically active intermediate layers (4) cover the optical markings (3). To create an optimum bond between the protective layers (1; 2), the intermediate layer (4) is subdivided in a predetermined pattern so that intermediate-layer-free adhesive bridges (5) are created for joining the protective layers (1; 2). This prevents the optical markings (3) from being exposed without being destroyed. The pattern of the adhesive bridges (5) can be utilised for providing the document with an artistic design. <IMAGE> |
申请公布号 |
DE3772880(D1) |
申请公布日期 |
1991.10.17 |
申请号 |
DE19873772880 |
申请日期 |
1987.05.13 |
申请人 |
LANDIS & GYR BETRIEBS AG, ZUG, CH |
发明人 |
BLAZSO, EVA, CH-6340 BAAR, CH |
分类号 |
B42D25/00;G06K19/14;G06K19/16;G06K19/18 |
主分类号 |
B42D25/00 |
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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