Giesecke & Devrient Gmbh

Giesecke+devrient Currency Technology Gmbh

Andreas Aigner

Theodor Burchard

Bernhard Wiedner

Wittich Kaule

Karlheinz Mayer

André Gregarek

Georg Depta

Matthias Pfeiffer

Andreas Hanelt

Thomas Gerhardt

Rudolf Seidler

Gunther Wild

Bernd Stumbeck

Guenther Wild

Wolfgang Wensauer

Alexander Tantscher

Astrid Drexler

Andreas HÄNELT

Christian Faulstich

Marcel PLÖGER

Georg Kiefersauer

Günther Wild

Markus Paetzold

The present invention relates to a dewatering screen for manufacturing paper having multi-level watermarks, having a carrier mold () that exhibits, in a fractional region, a multi-level relief () in the form of the watermark to be produced. According to the present invention, it is provided that the multi-level relief is formed by an injection-molded, perforated () watermark insert ().

Dewatering screen and method for manufacturing the same

A screen for producing two-level watermarks is produced by completely closing part of the screen with a viscous sealing compound, which is subsequently cured actively or passively. At the thus closed partial areas of the screen, paper deposit is hindered during papermaking so that the finished paper appears light in transmission in the areas. A mask is used for exactly positioning the sealing compound in the partial areas of the screen and/or for curing the sealing compound only in the given partial areas, whereby in the latter case the uncured areas of the sealing compound are washed out.

Papermaking mould for producing two-stage watermarks and method for producing the same

Dewatering screen and method for the production thereof

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Valley, Germany

Andreas Aigner