Patent ID: 6412411
Filing Date: 2002-07-02
Classification: B41F

Abstract:
A method of correcting a position of an ink fountain key in a printing press, in which an amount of ink to be supplied is adjusted by adjusting a position of each of a plurality of ink fountain keys with reference to a home position, comprising the steps of:setting a position of said ink fountain key as a present position with reference to a home position by using print data including an image area ratio of a reference plate having a predetermined image before actual printing; printing a printing product by using said reference plate with said ink fountain key being set at the present position; measuring a density of each of respective areas, corresponding to said ink fountain keys, of the obtained printing product; correcting one of the home position and the present position of said ink fountain key on the basis of a difference between the measured density of a corresponding area and a reference density; and controlling an operating amount of said ink fountain key based on one of the corrected home position and the corrected present position of said ink fountain key which is stored in a memory when the actual printing is performed.