| 摘要 |
<p>The printing machine includes a cyclically moving printing member having a printing surface, particularly a rotating printing roller carrying a lithographic printing form, and an inking arrangement for inking the printing surface. A counterpressure member is mounted for movement into an operative position in which it presses towards the inked printing surface so as to press an item to be printed against the inked printing surface. A feeding arrangement feeds an item to be printed into the space intermediate the printing surface and the counterpressure member. A synchronizing arrangement is coupleable to the cyclically moving printing member by a controllable coupling device so as to be driven by the cyclically moving printing member. When so coupled and driven, it is operative for causing the counterpressure member to move into operative position in synchronization with the movement of the printing member. A control arrangement controls the controllable coupling device and accordingly the driving connection between the cyclically moving printing member and the synchronizing arrangement in dependence upon the actual feeding of the item to be printed.</p> |
