Positive original template for galvanoplastic shape of metallic foils

摘要

A metal foil made by electroforming from a master pattern with the interposition of a negative form, and serving as packing for sheet guiding cylinders and/or drums of rotary printing machines, including a substantially planar member having one flat face and an opposite face with a textured surface structure corresponding to an upper side of the master pattern, the upper side of the master patten having been roughened by a jet treatment and coated with a levelling galvano-layer in order to eliminate undercuts, the master pattern per se, and method of manufacture.