Patent ID: 6752081
Filing Date: 2004-06-22
Classification: B41F

Abstract:
A method of adjusting dampening-solution feed of an offset printing press by a control device, which comprisesdetermining, in a first step, a required dampening-solution demand for a first calibration printing form with a known minimum percent area coverage and for a second calibration printing form with a known maximum percent area coverage at a calibration speed, and storing the dampening-solution demand in the control device as interpolation reference points; determining, in a second step, a percent area coverage lying between the maximum and the minimum percent area coverage of the calibration printing forms of a printing form to be used for a forthcoming print job, and passing the determined percent area coverage on to the control device; determining by the control device, in a third step, the dampening-solution demand required for the forthcoming print job with the printing form provided for the purpose at the calibration speed, by interpolating between the interpolation reference points; determining, in a fourth step, a printing-speed dependent characteristic curve of the dampening-solution demand required for the forthcoming print job with the printing form provided for the purpose; and controlling, in a fifth step, during the processing of the print job, the feed of the dampening solution along the characteristic curve.