Rotary printing machine

A printing machine of the type comprised of a cyclically moving printing member having a printing surface and inking means for inking the printing surface, comprising, in combination, a counterpressure member 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;

• feeding means for feeding an item to be printed into the space intermediate the printing surface and said counterpressure member;
• moving means activatable for moving said counterpressure member into said operative position;
• controllable coupling means;
• synchronizing means coupleable with the cyclically moving printing member by said controllable coupling means so as to be driven with the cyclically moving printing member and operative when so coupled and driven for effecting transfer to items to be printed of predetermined portions of the ink image on the printing surface by activating said moving means in synchronization with the movement of the printing member;
• and control means operative for detecting feeding of an item to be printed and in response to such detection engaging said controllable coupling means and accordingly establishing a driving connection between the cyclically moving printing member and said synchronizing means, wherein said controllable coupling means is a controllable clutch means for effecting a mechanical coupling between said synchronizing means and the cyclically moving printing member.

A printing machine of the type comprised of a cyclically moving printing member having a printing surface and inking means for inking the printing surface, comprising, in combination, a counterpressure member 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;

• feeding means for feeding an item to be printed into the space intermediate the printing surface and said counterpressure member;
• moving means activatable for moving said counterpressure member into said operative position;
• controllable coupling means;
• synchronizing means coupleable with the cyclically moving printing member by said controllable coupling means so as to be driven with the cyclically moving printing member and operative when so coupled and driven for effecting transfer to items to be printed of predetermined portions of the ink image on the printing surface by activating said moving means in synchronization with the movement of the printing member;
• and control means operative for detecting feeding of an item to be printed and in response to such detection engaging said controllable coupling means and accordingly establishing a driving connection between the cyclically moving printing member and said synchronizing means, wherein said synchronizing means comprises cam means coupleable to the cyclically moving printing member by said controllable coupling means, and wherein said moving means comprises cam follower means displaceable by said cam means to transmit motion to said counterpressure member to move the latter into said operative position.