Patent ID: 7066087
Filing Date: 2006-06-27
Classification: B41F,B41P

Abstract:
1. A dampening water feeding method in which densities of detecting patches printed on prints in a first print job are used to control a feed rate of dampening water in a second print job following the first print job, said method comprising: a density measuring step for measuring the densities of the detecting patches on the prints obtained from the first print job; a feed rate calculating step for calculating a feed rate of the dampening water from the densities of the detecting patches measured in said density measuring step; a base feed rate calculating step for calculating a base feed rate of the dampening water based on the feed rate obtained in said feed rate calculating step and on a humidity and a temperature occurring when the first print job is performed; a proper feed rate calculating step for calculating a proper feed rate of the dampening water based on the base feed rate obtained in said base feed rate calculating step and on a humidity and a temperature occurring when the second print job is performed; and a dampening water feeding step for feeding the dampening water when performing the second print job, based on the proper feed rate obtained in said proper feed rate calculating step.