Klockner Pentaplast Gmbh

Kloeckner Pentaplast Gmbh & Co. Kg

Klöckner Pentaplast Gmbh & Co. Kg

Christian Kohlert

Cedric Reuter

Bernd Schmidt

Lorenz Diener

Axel Müller

Tamara Zistjakova

Sven Behrendt

Tamara Chistykova

Walter Egenolf

Heinz Gaertner

Tamara Chistyakova

Marco Schaaf

Adrian Fasel

Sascha Jürgens

Evgeny Belukhichev

Andreas Schnabel

Alexander Razigraev

Frank Michels

The invention relates to a method and system for optical product authentication, in which a product is labeled with optically active particles, a reference image is recorded in a registration step and a recognition image of the optically active particles is recorded in a recognition step. The product is then authenticated by comparing image data or a coding derived from image data in the registration step versus the recognition step.

Method and system for optical product authentication

A packaging film which contains pigment particles randomly distributed in a low surface-area density is used for the authentication of products. An imaging device is used to record a first digital image of a packaged product. The positional coordinates, and optionally the color values, of the pigment particles contained in the packaging film are determined from the digital image by means of a computer program and an identification code is calculated from the coordinate or color values and stored in a database. To authenticate the product at a later time, a second digital image is recorded and a test code is determined and compared with the recorded identification code.

Packaging film for product authentication, authentication method and system

The shrinkage of a calendered amorphous film is continuously controlled during the taking off from a calender, the shrinkage being measured over the film width and the film length with the aid of the dichroism of the film. For this purpose, a shrinkage measuring instrument 51 supplies measured data concerning shrinkage of the film to a connected measured-data computer 52 which is connected, on the one hand, via an interface to a master computer 53, and, on the other hand, to a screen display 54. Characteristic calibration curve parameters of different film types and shrinkage deviations and/or of shrinkage limits are stored in the master computer and are, upon request, fed into the measured-data computer. The measured anisotropy of the film is converted into the respective shrinkage by means of a calibration curve, which is based on the calibration curve parameters. If the shrinkage is not within the prescribed limits, the master computer applies signals to the actuators for the purpose of controlling the friction and the rotational speed between the last calender roll and first take-off roll, for the purpose of temperature control or cooling the take-off and chill rolls, for the purpose of controlling the rotational speeds of the take-off rolls and for the purpose of the temperature control of the last calender roll.

Method for continuously controlling the shrinkage of an amorphous film,

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Oberahr, Germany

Christian Kohlert