Constantia Teich Gmbh

Teich Aktiengesellschaft

Engelbert Scharner

Adolf Schedl

Lambert Nekula

Wilhelm Zuser

Martin Kornfeld

Rainer Huber

Christof Brunnthaller

Helmut Kloss

Method for producing an aluminum foil with integrated security features. An aluminum foil is rolled down to a thickness of less than 150 &#x3bc;m in a plurality of cold rolling passes, texturing that runs in the direction of rolling being induced simultaneously on both surface sides of the foil. In a final cold rolling pass, the foil is fed to a working roller pair, in which, on at least one roller surface, the relief-like surface structuring generated in the rolling direction by grinding was reduced on the basis of contrast and motif in a region of 10 to 50% relative to the average surface roughness to form a motif for a security feature that is transferred to the surface side of the foil facing the roller surface. The generated aluminum foil has a glossy appearance on both sides such that the security feature rises clearly due to its dull appearance.

Method for producing an aluminium foil with integrated security features

A counterfeit-proof metal foil is textured in at least a given partial area of its surface, this partial area having a radiation refraction value which is different compared to the remaining surface area. The metal foil is suitable as a packaging material, among others for medications. The manufacturer or the consumer can check based on the given surface structure which is intended as an identification sign whether he has acquired an uncounterfeited product. If texturing takes place on most of the surface of the metal foil, this is identical to the appearance of a printed picture so that the metal foil as claimed in the invention is likewise used as a decorative foil or an advertizing medium.

Counterfeit-proof metallic foil

Growing community of inventors

Kilb, Austria

Engelbert Scharner