| 摘要 |
The present invention relates to a folder for a rotary offset printing press comprising a transfer cylinder, a first-fold cylinder and a second fold cylinder. Each of the cylinders is constructed of two imbricated independent parts, and inner part and an outer part, moveable relative to one another and equipped with a respective driving gear. The drive gears of the respective cylinders are coupled to one another two-by-two so that coincidence between the cylinders is preserved. The drive gears of the transfer cylinder are connected to one another by a first pair of coupling gears coaxial relative to one another and interconnected by a first disengageable coupling and the drive gears of the first-fold cylinder being connected to one another by a second pair of coupling gears coaxial relative to one another and interconnected by a second disengageable coupling. An adjustment device for varying the angular displacement between the pairs of elements of the respective cylinders when the first and second disengageable couplings are in a disengaged position so as to convert the folder from a configuration that forms second parallel folds to one that forms delta folds.
|
