| 摘要 |
The action pattern of the web feeding amount by the lug folding flaps is made optimal in compliance with deviations of detection marks such as specified printing patterns on the printing surface on web W from the reference values when they are detected, and the pressing force applied onto web W by dancer roller 9 is escalationally (stepwise) or continuously adjusted according to the action patterns. Therefore, comparison with the conventional examples, it is possible to widen the corrective range of web feeding amount. Thus, the range for unevenness due to printing errors on web W can be widened, and it is possible to operate the equipment without making a stop. Furthermore, it is possible to produce packaging containers with printing patterns applied onto appointed positions, and faulty products are eliminated. <IMAGE> |
