Patent ID: 6883432
Filing Date: 2005-04-26
Classification: B41F,B41P,Y10S

Abstract:
1. An ink feeding method for a printing machine, for controlling an ink feeding rate by measuring color density of print, said method comprising: a color density measuring step for measuring color density of prints at intervals of time; a color density gradient computing step for computing, based on a plurality of color densities of prints measured in said color density measuring step, a color density gradient representing a rate of variation in the color density of prints occurring with an increase in the number of prints; an expected color density computing step for computing, based on the color density gradient computed in said color density gradient computing step, an expected color density of prints occurring after a predetermined number of prints are made; and an ink feeding rate controlling step for controlling the ink feeding rate based on a difference or ratio between a current color density of prints and a target color density of prints; and if the target coloring density is determined to exist between the current color density and expected color density, a variation of ink feeding rate in said ink feeding rate controlling step is reduced.