Method and device for regulating a supply of dampening solution in an offset printing press
AssigneeHeidelberger Druckmaschinen AG
InventorsWilli Jeschke, Norbert Freyer
Life of this patent
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Abstract
Method for regulating a supply of dampening solution in an offset printing press having a printing plate includes supplying at least one selected region of the printing plate with a well-defined amount of energy; determining and measuring scumming occurring in the selected region; comparing the measured scumming in the selected region with a prescribed scumming matched to the respective supplied amount of energy; and adjusting the supply of dampening solution, if the measured scumming and the prescribed scumming deviate from one another; and a device for performing the method.
Claims18
Method for regulating a supply of dampening solution in an offset printing press having a printing plate, which comprises supplying at least one selected region of the printing plate with a well-defined amount of energy for removing a constant quantity of dampening solution from the selected region;
- determining and measuring scumming occurring in the selected region;
- comparing the measured scumming in the selected region with a prescribed scumming matched to the respective supplied amount of energy;
- and adjusting the supply of dampening solution, if the measured scumming and the prescribed scumming deviate from one another.
Device for regulating a supply of dampening solution in an offset printing press having at least one printing plate, comprising at least one energy source for the one printing plate for supplying at least one selected region of the one printing plate with a well-defined amount of energy for removing a constant quantity of dampening solution from the selected region;
- measuring means for determining and measuring scumming occurring in said one selected region;
- evaluation means for comparing the measured scumming in said one selected region with a given scumming value matched to said well-defined amount of energy;
- and adjusting means for correcting said supply of said well-defined amount of energy in accordance with any deviation between said measured scumming and said given scumming value determined by said evaluation means.
Dependencies are inferred from the claim text.