EMBOSSING DEVICE AND PACKAGING MACHINE COMPRISING THE DEVICE

摘要

An embossing device comprises a first embossing roller and a second embossing roller forming a passage for a web of wrapping material to be embossed, which has a main line of extension and a direction of feed; the first embossing roller comprises on its outer surface toothings to make an imprint on the web; a first toothing having a first impression to imprint on said web a first segment of a reference for identifying a section of the web and a second toothing to imprint a decorative pattern on the web; the second toothing comprises a zone without teeth for defining on the web a second, unembossed segment of the reference; the first toothing and the zone without teeth are offset from each other along a directrix of the first roller.

主权项

1. A method for identification of a section of a continuous web having a main line of extension and movable in a direction of feed according to a predetermined path, said method comprising:
a step of definition on said web of a reference associated with said section, a step of reading said reference to identify said section using the contrast between said reference and said web, said method being characterized in that said step of definition of a reference comprises a step of embossing said web using an embossing device, said reference comprising at least a first embossed segment and a second unembossed segment, said first segment having a contrast compared with said web which is different to the contrast of said second segment compared with said web, said first and second segments being positioned on said web along respective strips parallel with said main line of extension, said method comprising a step of reading the reference segment out of said first and second segments which has greatest reading contrast, said section being identified based on the segment having the greatest reading contrast.