| 摘要 |
PROBLEM TO BE SOLVED: To reduce an operation burden to an operator, improve printing quality, and prevent loss of paper from generating, by moving a curl removing means to a curl removing position when printing is changed from perfect printing to broadside, and moving a curl removing means to a curl refuge position at simultaneously with changeover from the broadside to the perfect printing. SOLUTION: At executing broadside, when a broadside button is made ON, a control device controls to advance the rod 4a of an air cylinder 4 and open a solenoid valve. By this control, a curl correcting means 35 is positioned on a curl correcting position, and air around an air tube 45 is sucked in the air tube 45 through a sucking port. Next, at executing perfect printing, when a perfect printing button is made ON, the control device controls to retreat the rod 4a of the air cylinder 4 and close the solenoid valve. By this control, the curl correcting means 35 is positioned from the curl correcting position to a refuge position and suction of air into the air tube 45 is stopped.
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