Damping unit for an offset printing machine

Details Damping unit for an offset printing machine Damping unit for an offset printing machine

B - Operations, Transporting

41

L

101/60

B41L 23/02 (2006.01) B41F 7/26 (2006.01)

Patent

CA 1316041

ABSTRACT OF THE DISCLOSURE In order to obtain a clean-cut print, especially one free from so-called "gearmarks", the metering roll, in a damping unit for an offset printing machine comprising a pair of rolls consisting of an applicator-roll and a metering roll, is driven, as a single roll of the said pair of rolls, by a gearwheel meshing with a driving gear of a gear-train, while the applicator-roll is driven solely by friction, braking torques, acting upon the applicator-roll at a higher peripheral velocity than a plate-cylinder associated therewith, compensating the metering roll to such an extent that the said applicator-roll rotates, with the damping unit in the running-on position, at a peripheral velocity of the order of 0.5 - 2% less than that of the said plate-cylinder.

568504

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