Patent ID: 8516960

Claim:
Ink wiping system for an intaglio printing machine comprising a wiping tank, a wiping roller rotatably supported in the wiping tank and having a circumferential surface positioned for rolling contact with at least one printing plate of the intaglio printing machine and cleaning means for cleaning the surface of the wiping roller, said cleaning means comprising at least a first spray unit for spraying clean wiping solution against the surface of the wiping roller and a drying blade placed downstream of said first spray unit with respect to a direction of rotation of said wiping roller for removing wiping solution residues from the surface of the wiping roller, wherein said cleaning means further comprise a cleaning assembly placed between said first spray unit and said drying blade, said cleaning assembly including at least one supporting plate with a series of holes and holding means for holding said supporting plate, said supporting plate being conformed to extend parallel to a part of the circumferential surface of the wiping roller without touching said wiping roller, said cleaning assembly further comprising at least a cleaning sheet made of porous material placed on said supporting plate and in contact with the surface of said wiping roller for removing ink therefrom, wherein said first spray unit is disposed before an upstream end of said cleaning assembly with respect to the direction of rotation of the wiping roller in such a way as to spray clean wiping solution directly between the surface of the wiping roller and said upstream end of the cleaning assembly, and wherein a first portion of said supporting plate directly following the location of said first spray unit is free of any holes so as to constrain the wiping solution sprayed by said first spray unit between the surface of the wiping roller and the surface of the supporting plate.