Mario Keller
Giesecke & Devrient
36 Papers
366 Citations
Mario Keller 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 9, co-authored 36 publications.
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Papers
Patent
Security element for security papers and valuable documents
Mario Keller,Theo Burchard +1 more
- 17 Dec 2002
TL;DR: In this paper, a security element for security papers, valuable documents, identity cards, or the like that is self-supporting and provided with two different security features is described.
86
Patent
Multi-ply security paper
Friedrich Kretschmar,Mario Keller,Liebler Ralf,Juergen Ruck,Wolfgang Wensauer,Burchard Theodor,Thomas Bodendieck,Grauvogl Gregor,Horst Reigl +8 more
- 14 Mar 2006
TL;DR: In this article, a multi-ply security paper for the production of security or value documents, such as banknotes, identity cards and similar, was introduced, where an endless security element was introduced into a first paper ply, which is freely accessible on at least one side of the paper ply.
65
Patent
Method for producing a microstructure
Winfried Hoffmüller,Theodor Burchard,Marius Dr. Dichtl,Patrick Renner,Michael Rahm,Manfred Heim,Lars Hoffmann,Manfred Dotzler,Ralf Liebler,Mario Keller +9 more
- 17 Dec 2008
TL;DR: In this paper, a method for producing a microstructure on a carrier is described, in which a carrier (22) is provided with a relief structure (26, 28) having elevations (26) and depressions (28), and in which the elevations and/or depressions are arranged in the form of the desired micro-structure, and an imprint substance (30, 34) is transferred onto the relief structure by means of a printing tool, wherein the viscosity of the imprint substance is chosen in such a way that the imprint material is transferred selectively
41
Patent
Laminated multi-layer card with an inlaid security element in the form of relief structures
Mario Keller,Günter Endres,Manfred Engl +2 more
- 20 Feb 2001
TL;DR: In this article, the authors proposed a method to produce the laminated multi-layer card by conventional lamination methods and prevent the relief structure from being considerably impaired by the process pressures and temperatures.
33
Patent
Method for producing a security element and security element obtainable according to the method
Bernd Oweger,Karin Winkler,Bernhard Wiedner,Manfred Heim,Plaschka Reinhard,Friedrich Kretschmar,Christoph Mengel,Burchard Theodor,Liebler Ralf,Mario Keller,Jürgen Ruck,Hoffmueller Winfried +11 more
- 05 Aug 2010
TL;DR: In this paper, the authors proposed a security element consisting of a substrate having at least one opening, where the opening is closed on one side by an at least partially translucent or transparent film and a coating is present on the side of the substrate.
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