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(11) | EP 2 339 105 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Security door comprising an observation window |
| (57) The present invention relates to a security door. The door comprises a first (3)
and a second (4) sheet material. The sheet materials are arranged parallel to each
other and at a distance apart, thus defining a door leaf with an inner space. A translucent
part (7) is arranged between the first and the second sheet material. The translucent
part covers a see-through opening (8, 9) arranged in the respective sheet material.
A third sheet material (10) is arranged in the inner space and the translucent part
is fastened in the door with the aid of the third sheet material.
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