November Aktiengesellschaft Gesellschaft Fur Molekulare Medizin

Eckart Gmbh

Hueck Folien Ges.m.b.h.

Secutech International Pte. Ltd.

Hueck Folien Ges .m.b.i.i.

November Ag

Hueck Folien Gmbh

Georg Bauer

Harald Walter

Ralph Domnick

Friedrich Kastner

Martin Bergsmann

Wolf Bertling

Thomas Schuster

Christian Wolfrum

Jörg Hassmann

Hans Kosak

Jürgen Keplinger

Thomas Klaumunzer

Björn Graβl

Radoslav Maksimovic

André Josten

A tamper-proof security element includes at least one polymer spacer layer and two metal cluster layers. One or more of the layers, in addition to their function, fulfills a security feature in their color-shift set-up.

Forgery-proof security element with color shift effect

The invention relates to a platelike color effect pigment having the following structure: a) a metallic reflective core; b) a spacer layer made of a dielectric material, and; c) an, all in all, semitransparent absorber layer comprising, in essence, discrete metal particles that have an average diameter of 1 to 100 nm and optionally at least one other protective layer.

Color effect pigment with a layer made of discrete metal particles, method for the production thereof and its use

The invention relates to a method for producing tamper-proof identification elements, and to tamper-proof identification elements produced according to said method and consisting respectively of at least one layer () reflecting electromagnetic waves (), a spacer layer, and a layer consisting of metallic clusters (). According to said method, a partial or all-over layer reflecting electromagnetic waves is applied to a carrier substrate (), followed by at least one partial and/or all-over polymer layer having a defined thickness (), and a layer consisting of metallic clusters which is produced by means of a method using vacuum technology or from systems based on solvents is then applied to said spacer layer(s).

Method for producing tamper-proof identification elements

The invention relates to a device for checking the authenticity of an anti-forgery marking with colors which change depending on the angle of observation, comprising a) several first light sources, emitting in a given spectral range, whereby the light sources are different from each other with regard to the wavelength of the emission maximum thereof and the first light sources () are housed in a housing () such as to irradiate the surface (O), with the housing () placed thereon, at a given first angle (&#x3b1;), b) a first means () for measuring the intensity of the light reflected from the surface (O) arranged at a second angle (&#x3b1;) and c) a means () for the automatic comparison of measured intensities with the reference intensities stored for at least one given color for each light source ().

Device and method for checking the authenticity of an anti-forgery marking

The invention relates to a method for forgery-proof labeling of items, such as credit cards, bank notes and the like, comprising the following steps: (a) applying, to a first layer () that reflects electromagnetic waves, an inert second layer () that is permeable to electromagnetic waves, said second layer having a predetermined thickness, (b) applying, to said second layer (), a third layer () that is formed by metal clusters, and (c) linking the first layer () of the label so produced with the item.

Method for forgery-proof labeling of items, and forgery-proof label

The invention relates to forgery-proof marking for objects, such as check cards, banknotes, labels, and the like, comprising a plastic transparent film () having a first and second surface, whereby a series of layers is applied to the second surface. When viewed from the first surface, the color of this series of layers changes according to the viewing angle, and the series of layers is formed from an absorber layer provided on the second surface, from a spacer layer () overlying the absorber layer, and from a mirror layer () overlying the spacer layer (). In order to improve the machine identification of the authenticity of the marking, the invention provides that the absorber layer is comprised of metallic clusters ().

Forgery-proof marking for objects and method for identifying such a marking

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Nürnberg, Germany

Georg Bauer