Method and device for traceability marking and packaging line provided with traceability marking device

Abstract

The present invention relates to a method for visualization of non-visible information on a packaging material to provide traceability. The method comprises the steps of: reading the non-visible information from the packaging material by means of a magnetic head reader, processing the non-visible information in a central processing unit together with additional new non-visible information, and printing an optional portion of the amount of combined non-visible information onto the packaging material as a traceability marking. The invention also relates to a device for carrying out the method and a packaging line with a filling machine making use of the device.

1 . A packaging material laminate for forming a package having,
 a core layer of paper or carton; a first polymer layer on the side to be the outside of the package; a second polymer layer on the side to be the inside of the package, and wherein the packaging material laminate comprises an area or a layer of a laser sensitive material, and magnetisable material.   
     
     
         2 . A packaging material laminate according to  claim 1 , wherein said laminate is a web. 
     
     
         3 . A packaging material laminate according to  claim 1 , additionally comprising an aluminium foil at the inside of the core layer by means of an adhesive layer. 
     
     
         4 . A packaging material laminate according to  claim 1 , wherein the magnetisable material keeps non-visible information. 
     
     
         5 . A packaging material laminate according to  claim 1 , wherein the laser sensitive material changes colour upon exposure to laser light. 
     
     
         6 . A packaging material laminate according to  claim 1 , wherein the laser sensitive material comprises laser sensitive ink or laser sensitive pigments. 
     
     
         7 . A packaging material laminate according to  claim 5 , wherein the laser sensitive ink is covered by the first polymer layer being transparent. 
     
     
         8 . A packaging material laminate according to  claim 7 , wherein the laser sensitive ink is transparent. 
     
     
         9 . A packaging material laminate according to  claim 5 , wherein the laser sensitive pigment is provided in one of the layers of the packaging material laminate. 
     
     
         10 . A packaging material laminate according to  claim 1 , wherein the first and second polymer layer are polyethylene layers. 
     
     
         11 . A food packaging container comprising a packaging material laminate according to  claim 1 . 
     
     
         12 . A food package according to  claim 11 , wherein the food package comprises a visual printed mark visualizing non-visible information, or selected portions thereof, kept by the magnetisable material. 
     
     
         13 . A food package according to  claim 12 , wherein the visual printed mark regards packaging material traceability.