André Gregarek
Giesecke & Devrient
80 Papers
673 Citations
André Gregarek is an academic researcher from Giesecke & Devrient. The author has contributed to research in topics: Substrate (printing) & Layer (electronics). The author has an hindex of 13, co-authored 80 publications.
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Papers
Patent
Security Element and Method for Producing the Same
Winfried Hoffmüller,Marius Dr. Dichtl,André Gregarek +2 more
- 08 Aug 2005
TL;DR: A security element for security papers, bank notes, ID cards or the like, having at least one plastic layer on which at least two metal layers of different color are so disposed side by side and on the same side of the plastic layer that the different colors are visually checkable as discussed by the authors.
193
Patent
Dewatering screen and method for the production thereof
André Gregarek,Andreas Hänelt,Bernhard Wiedner,Burchard Theodor,Andreas Aigner,Günther Wild +5 more
- 05 Dec 2007
TL;DR: In this paper, a dewatering screen for the production of paper having multi-layer water marks, having a carrier screen (54) comprising a multilayer relief (30) in the form of the water mark to be produced in a partial region.
52
Patent
Optically variable security element
André Gregarek,Michael Rahm,Josef Schinabeck,Winfried Hoffmüller +3 more
- 28 Apr 2014
TL;DR: In this article, an optically variable security element for security papers, value documents and other data storage media, comprising a single or multi-layered central body (20) having opposing first and second main surfaces (22, 24), an arrangement of similar micro-lenses (26) on the first main surface (22) of the central body, the refracting effect of the microlenses defining a focal plane (28), a laser-sensitive recording layer (40) disposed on the second main surface(24), a mask layer (30) which is disposed between the
30
Patent
Entwässerungssieb und Verfahren zu seiner Herstellung
André Gregarek,Gerrit Lund,Günter Wild +2 more
- 11 May 2006
TL;DR: In this paper, the authors show that das mehrstufige Relief durch einen spritzgegossenen, perforierten (40) Wasserzeicheneinsatz (30) gebildet ist.
29
Patent
Optisch variables sicherheitselement
André Gregarek,Michael Rahm,Josef Schinabeck,Winfried Hoffmüller +3 more
- 29 Apr 2013
TL;DR: In this article, the authors find ein optisch variables Sicherheitselement (12) fur Sicherheitspapiere, Wertdokumente, and andere Datentrager, with einem ein- oder mehrschichtigen Zentralkorper (20) with gegenuberliegenden ersten and zweiten Hauptflachen (22, 24), einer auf der ersten Haupt-flache (22) des Zentralalkorpers
27