Copperplate engraving machine for printing paper currency

Details Copperplate engraving machine for printing paper currency Copperplate engraving machine for printing paper currency

B - Operations, Transporting

41

N

101/119

B41N 1/06 (2006.01) B41F 9/02 (2006.01)

Patent

CA 1200147

ABSTRACT OF THE DISCLOSURE An intaglio plate printing machine for printing paper currency, notably banknotes, comprising a plate carrier cylinder with at least one engraved or etched plate provided with cuts corresponding to the elements of a main design and shallower, finer cuts corresponding to the elements of a safety background, an impression cylinder cooperating with and contiguous to a surface of the plate cylinder; an inking roller cooperating with an inking unit and being in direct contact with the plate for inking the cuts corresponding to the elements of the main design, a plate wiping system contiguous to a surface of the engraved plate, and an inking system for inking the cuts corresponding to the safety background in several colors. This inking system consists of a collector cylinder having a smooth resilient surface cooperating with the engraved or etched plate, this collector cylinder being located, in the direction of rotation of the plate cylinder, ahead of the inking roller and comprising at its outer periphery three color selector cylinders for different colors which comprise in turn relief areas corresponding to the colored areas of the safety background, an inking device being associated with each color selector cylinder. This machine assures a perfect register between the reliefs of the various color areas obtained on the color selector cylinders of hard material for producing for example banknotes printed completely according to the direct plate printing or copperplate method. Due to the presence of hard surface material on the color selector cylinder, there is no limit as to the fineness of the safety background elements. - 1 -

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