METHOD AND DEVICE FOR PRODUCTION OF COUNTERFEIT-PROOF PAPER WITH WATERMARKS AND INTEGRATED SECURITY ELEMENT OF WINDOW TYPE

摘要

The invention relates to a device (10) for producing a security paper (60) having watermarks (72) and an integrated window security element (82), comprising a first paper layer generation device (12) for forming a first paper web (20) and for providing the first paper web (20) with watermarks (72), a first paper layer generation device (14) for producing a second paper web (30), a take-off screen (16) for merging the second paper web (30) with and fixedly joining the second paper web to the first paper web (20), an apparatus for supplying an endless security element (32; 82) in the region of the watermarks (72) between the first and second paper webs as the paper webs (20, 30) are merged, and a suction device (50) for removing paper fibers from the second paper web (30) in the still moist state. The invention further relates to an associated method and to a corresponding multi-layer security paper and document of value.