PROCESSING APPARATUS FOR APPLYING AUTHENTICATING CODING TO VALUE-CARRYING PAPER

摘要

In the process according to our invention authenticating (code) marks are provided on paper, particularly a security or other financial instrument, by contacting laser radiation from a laser light source on the paper to form the authenticating marks. The objects of our invention are attained with an apparatus equipped with a pivotable mirror device which allows the laser radiation to be directed on sheets of paper arranged transverse to the transport direction on a paper sheet. A preservative medium can be used to coat and protect the marks particularly from mechanical abrasion.