发明名称 |
Ausweiskarten mit visuell sichtbarem Echtheitsmerkmal |
摘要 |
The identity card (1) contains at least one layer (7) which is suitable for lettering. Information is written into this laye using a laser beam. The information is made irreversibly visible by changes of the optical properties effected by the laser beam The layer to be lettered is a lacquer layer in which additives, which are absorbent for the wavelengths of the laser writer introduced. |
申请公布号 |
DE4243987(C2) |
申请公布日期 |
2003.10.09 |
申请号 |
DE19924243987 |
申请日期 |
1992.12.23 |
申请人 |
GAO GESELLSCHAFT FUER AUTOMATION UND ORGANISATION MBH |
发明人 |
BERGMANN, MATTHIAS;HENKENSCHUH, HORST;KRUSCHE, REINHARD |
分类号 |
B29C47/00;B32B7/02;B42D25/41;G06K19/06;G06K19/08;G06K19/10;G06K19/18;G11B7/24;(IPC1-7):B44F1/12;G06K19/02;B42D15/10 |
主分类号 |
B29C47/00 |
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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