Drive with resister device for a printing unit of a rotary printing machine
AssigneeMAN Roland Druckmaschinen AG
InventorsPeter Knauer, Josef Singler
Life of this patent
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Abstract
In a printing unit with two printing groups working together using the blanket-to-blanket method, in order to rotate the form cylinder and the transfer cylinder equally during circumferential register adjustment, the transfer cylinders are drive connected via helical gears and the transfer cylinders and the form cylinders of each printing group are drive connected via straight spur gears. The drive of the printing unit is carried out on one of the helical gears. Circumferential register adjustment of a printing group is carried out by movement of its helical gear.
Claims9
In a printing unit of a rotary printing machine having a sidewall and two printing groups, each of which printing groups contains a form cylinder and a transfer cylinder, the transfer cylinders of which are positionable across from one another to print on both sides of a web passed between them, the transfer cylinders and the form cylinders having journals, a drive and register device, comprising:
- helical gears attached in non-rotatable fashion to the journals of the transfer cylinders and in drive connection with one another;
- straight spur gears mounted on the journals of the form cylinders and the transfer cylinders, the spur gears of the transfer cylinder and the form cylinder of each printing group being drivingly connected;
- a further spur gear in driving connection with the helical gear of one of the transfer cylinders;
- means, acting upon each form cylinder, for axially moving the form cylinder for lateral register adjustment, the helical gears being slidably arranged on the journals of the transfer cylinders so as to be axially moveable;
- and means for axially moving the helical gears on the transfer cylinder journals for adjusting circumferential register.
Dependencies are inferred from the claim text.