Patent ID: 7460706
Filing Date: 2008-12-02
Classification: B41P,G06K

Abstract:
1. A method of recognizing color bars on a double-sided color print printed by a double-sided color printing press with a first printing section and a second printing section, comprising: printing on a first side of a substrate a first color print image composed of plural basic different colors and a first color bar for evaluation of the respective plural basic different colors of said first color print image by said first printing section, said first color bar being comprised of at least one first control patch group aligned in a first alignment direction, each of said at least one first control patch group being comprised of plural control patches of plural colors aligned in said first alignment direction respectively corresponding to said plural basic different colors; printing on a second side of said substrate a second color image composed of said plural basic different colors and a second color bar for evaluation of the respective plural basic different colors of said second color print image by said second printing section, said second color bar being comprised of at least one second control patch group aligned in a second alignment direction different from said first alignment direction, each of said at least one second control patch group being comprised of plural control patches of plural colors aligned in said second alignment direction respectively corresponding to said plural basic different colors; scanning at least one of said at least one first control patch group and said at least one second control patch group in a scanning direction identical to said alignment direction of the patches in said scanned at least one control patch group, thereby acquiring alignment information of said scanned at least one control patch group; and recognizing whether said first and second color bars each have been printed on said first side or second side of said double-sided color print.