Patent ID: 8201903
Filing Date: 2012-06-19
Classification: B41F

Abstract:
1. An ink supply amount adjustment method for a printing press including an ink fountain which stores ink, a plurality of ink fountain keys opening ratios of which are adjustable, an ink fountain roller supplied with the ink from the ink fountain through a gap between the ink fountain roller and the ink fountain keys, and an ink ductor roller which further supplies the ink, supplied to the ink fountain roller, to a printing plate by an ink feed operation, comprising the steps of: measuring a density value of each density measurement patch printed in a range corresponding to each of the ink fountain keys on a printed printing sheet; obtaining an opening ratio of each of the ink fountain keys in preliminary ink feeding, based on a difference between a measured density value of a patch and a preset reference density value, and one of a current opening ratio of each of the ink fountain keys and image data in the range corresponding to each of the ink fountain keys; and performing an ink feed operation of the ink ductor roller while printing is suspended, after setting the opening ratio of each of the ink fountain keys to the obtained opening ratio in preliminary ink feeding.