Abstract: A packaging material comprising a plurality of magnetizable portions thereon comprising at least one spot per package to be formed from the packaging material is disclosed. At least one of the magnetizable portions provides a magnetic mark carrying a magnetic field pattern. The magnetic field pattern comprises a first magnetic field peak having a first polarity and a second magnetic field peak having a second opposite polarity.

Abstract: A method for sealing a first packaging material laminate, comprised of at least one layer of magnetizable particles and a sealable layer, to a second packaging laminate involves facing the sealable layer towards the second laminate, providing an alternating magnetic field to the laminates in a sealing zone, thereby generating magnetic hysteresis losses in the laminate having the magnetizable particles, which losses create heat substantially melting the sealable layer in the sealing zone, and applying a sealing pressure to the first and second laminate to cause the first and second laminate to be pressed together in the sealing zone, thereby sealing the laminates to each other.

Abstract: A packaging material comprising a plurality of magnetisable portions thereon comprising at least one spot per package to be formed from the packaging material is disclosed. At least one of the magnetisable portions provides a magnetic mark carrying a magnetic field pattern. The magnetic field pattern comprises a first magnetic field peak having a first polarity and a second magnetic field peak having a second opposite polarity.

Abstract: A method for sealing a first packaging material laminate, comprised of at least one layer of magnetizable particles and a sealable layer, to a second packaging laminate involves facing the sealable layer towards the second laminate, providing an alternating magnetic field to the laminates in a sealing zone, thereby generating magnetic hysteresis losses in the laminate having the magnetizable particles, which losses create heat substantially melting the sealable layer in the sealing zone, and applying a sealing pressure to the first and second laminate to cause the first and second laminate to be pressed together in the sealing zone, thereby sealing the laminates to each other.

Abstract: A position detector arrangement for detecting a position of a packaging material with magnetic marking comprises a sensor assembly comprising a plurality of magnetic sensor units each comprising an output providing an output signal. The magnetic sensor units are arranged in at least two sensor unit pairs, with the sensor units of each pair arranged with opposite sensitivity directions, and with the sensor units arranged to sense magnetic markings of the packaging material. A signal processing assembly is connected to the outputs of the magnetic sensors and comprises a combiner arranged to aggregate the output signals of the sensors to an aggregated signal; and a detector arranged to determine the position of the packaging material from the aggregated signal. Further, a method for detecting a position of a packaging material with magnetic markings is disclosed.