Patent ID: 9159000
Filing Date: 2015-10-13
Classification: B24B,B41F,B41M,G06K

Abstract:
1. A device for making security marks positionable on a sheet of paper comprising a main rotary cylinder for backing said sheet of paper, wherein said supporting main rotary cylinder includes retaining means of said sheet of paper, and a rotary grinding wheel adjacent to the perimeter of said supporting main rotary cylinder with a distance of approach adjustable regarding said supporting main rotary cylinder, wherein said device is characterized by further comprising: at least one simultaneously backing and printing die comprising a free face with a pre-designed image, which is mounted on said perimeter of said main rotary cylinder, wherein said at least one simultaneously backing and printing die is suitable for backing said sheet of paper against said grinding wheel at the distance of approach sufficient to wear out the front of said paper without passing through it and matching said pre-designed image, and is suitable for printing simultaneously said pre-designed image with ink on the reverse of said sheet of paper, and at least one first inking roller train comprising at least one first applicator roller of said ink and that is positioned so as to make contact with said free face with said pre-designed image of the simultaneously backing and printing die.