Patent ID: 7975906
Filing Date: 2011-07-12
Classification: B41F

Abstract:
1. A process for numbering substrates having security prints printed thereon, each of said substrates comprising a plurality of security prints which are arranged in k columns and n rows on the substrate, wherein product k*n is an integer multiple of ten or of twenty-five, said process comprising the step of numbering successive runs of 10 N substrates each, by providing each of the security prints with a serial number Serial#, the serial number Serial# being calculated with the formula: where Start# is a starting number from which numbering starts, α is equal to −1 or +1 depending on whether numbering is carried out downwards or, respectively upwards, r identifies the run of 10 wherein digits N+2 and N+1 of the serial number Serial# are produced by sequential actuation of a double numbering wheel bearing a predetermined sequence of digit pairs for digits N+2 and N+1.