D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
D21H 21/40 (2006.01) B42D 15/00 (2006.01) B44F 1/12 (2006.01) D21F 1/44 (2006.01)
Patent
CA 2569243
An antifalsification paper is described having an embedded safeguarding thread which is embedded in the paper so as to be freely accessible in some areas. The safeguarding thread has a width greater than 2 mm. The antifalsification paper comprises at least two paper layers produced on separate paper machines. The safeguarding thread is embedded in the first paper layer which has openings or recesses in its surface through which the thread is partly accessible on both sides. This first paper layer is covered with at least one second paper layer and firmly connected therewith, the second paper layer having a thickness of 10 to 50%, preferably 20%, of the total thickness of the antifalsification paper. The use of particularly wide safeguarding threads and the resulting possibility of equipping the threads with certain optical effects can improve the resistance to forgery of the antifalsification paper provided therewith.
Harms Siegfried
Mueck Hajo
Giesecke & Devrient Gmbh
Riches Mckenzie & Herbert Llp
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