| 摘要 |
A cover S is fed between pairs of first and second feed rollers 2, 3; 4, 5 which synchronously rotate in the same direction, each of first and second creasing units 13, 14 composed of a fixed die 15 and a movable die 16 is disposed between the pairs of first and second feed rollers, the fixed and movable dies are opposite to each other and with a feed path F of the cover therebetween, a sensor 29 is disposed between the pair of first feed rollers 2, 3 and the first creasing unit 13 for detecting a front end of the cover, rotation number of the pairs of first and second feed rollers is controlled, the pairs of first and second feed rollers are stopped, the creasing unit is operated, and the movable die is pressed on the fixed die every time the cover is fed by a predetermined length from the sensor so that at least one crease is formed on the cover.
|
