Patent ID: 7975906

Claim:
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: Serial#=Start#+α*[( r− 1) *k*n* 10 N +(( i− 1)* n +( j− 1))*10 N +MOD( s− 1;10 N )], 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 N successive substrates, i and j respectively identify the column and the row on the substrate where the security print to be numbered is located, s is a number which identifies the substrate onto which the security print to be numbered is located and MOD(x; y) designates the so-called modulus function which returns the integer remainder of the division of y by x, 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.