System and method for producing a packaging laminate and packages made from the packaging laminate
AssigneeTetra Laval Holdings & Finance S.A.
InventorsTommy Nilsson, Håkan Svenson, Hans Johansson, Lars Bergholtz, Claes Ingvert
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Abstract
A system and a method for production of a packaging laminate that comprises a layer containing magnetizable particles. The method involves marking faults, such as single spot defects and splices, on the packaging laminate by the application of a magnetic field to make a magnetic mark on the packaging laminate. A packaging device is arranged to sense the presence of the magnetic mark related to a package made from the packaging laminate.
Claims10
A system for production of a packaging laminate, said laminate including a layer comprising magnetisable particles, wherein the system comprises a scanner arranged to detect a fault in the packaging laminate;
- and at least one magnetising means activated by the scanner upon detecting a fault for applying a magnetic field for magnetising an amount of the magnetisable particles to make a magnetic mark in the packaging laminate indicative of a location of the fault.
A method for production of a packaging laminate, comprising:
- providing the packaging laminate which has a layer comprising magnetisable particles;
- identifying a fault in the packaging material;
- applying a magnetic field to magnetize at least some of the magnetisable particles and make a magnetic mark in the packaging laminate marking a location of the fault;
- and
- sensing, by a magnetic sensor, the presence of the magnetic mark indicative of the fault.
Dependencies are inferred from the claim text.