Abstract: An offset printing apparatus has a fluid-cooled nip roll which, in use, presses a hot, rapidly moving, endless printed and dried web into intimate contact with the first downstream chill roll while avoiding damage to the web, nip roll, or chill roll, and while avoiding ink picking by the web surface contacted by the nip roll. Employing the nip roll in the system also permits the use of a substantially shorter dryer and fewer chill rolls as compared to a conventional system operating at the same web speed. A coolant circuit for the nip roll preferably includes a warmup loop which temporarily circulates warm fluid through the nip roll when the system is first taken off-line, thereby preventing condensate formation or frost formation on the nip roll.

Abstract: Drive for a printing press having a plurality of printing units having plate cylinders, elements for transporting stock, and elements which do not transport stock includes a gear-transmission device for interconnecting the printing units, a plurality of motors, respectively, coupled at various locations to the gear-transmission device, a device for controlling and regulating delivered power connected to the motors, and a device for feeding signals regarding rotational speed in the gear-transmission device to the control and regulating device, the gear-transmission device including a gear-transmission unit for driving all of the stock-transporting cylinders and the plate cylinders; at least one of the motors being connected to the gear-transmission unit; at least one sensor for detecting motion variables in the gear-transmission unit; at least one drive for driving the elements of the printing press which do not transport stock; at least another sensor for detecting motion variables in the drive for driving th