Heidelberger Druckmaschinen Ag

Georg Rossler

Bernhard Wagensommer

Michael Kruger

Klaus Hartmann

Rudi Junghans

Wolfgang Pfizenmaier

Rolf Spilz

Wolfgang Durr

Ink is accurately metered in the defined transfer thereof from a fountain roller to a first ink roller in a printing unit. A ductor roller is swiveled back and forth between the ink fountain and the ink roller with a swivel mechanism. The swivel mechanism is driven independently of a main drive of the printing unit and with a discontinuous drive. Several parameters are thereby individually adjusted, among them a phase relationship between the ductor roller and a plate cylinder of the printing unit, a number of ductor beats per revolution of the cylinders of the printing unit, and a contact time of the ductor roller at the fountain roller and a contact time of the ductor roller at the first ink roller.

Method and device for the controlled transfer of printing ink

Device for damping mechanical vibrations of a printing press having rotating parts includes at least one actuating member assigned to the rotating parts of the printing press for applying adjusting forces thereto, and at least one vibration pick-up operatively connected to the actuating member for controlling the actuating member so that the adjusting forces applied by the actuating member damp the mechanical vibrations; and method of damping mechanical vibrations of a printing press.

Device and method for damping mechanical vibrations of a printing press

Method for setting the cutting register on a cross-cutting device positioned downline of a web-fed printing press, the position of the cut edges being variable as a function of the position of the printed image on a moving web, includes scanning with a first scanning device located directly after a last printing unit of the web-fed printing press a printed image on a moving web, generating and feeding signals regarding the printed image to a control device, generating signals with an angle sensor connected to web-guiding cylinders of the web-fed printing press, and associating the angle-sensor signals with the printed-image signals in a region between two printed images and storing the signals in the control device, generating signals regarding the printed image with a second scanning device directly before a cross-cutting device in the region between the two printed images, directing the scanning device, as viewed in a transverse direction of the web, at the same line as the first scanning device, periodically generating signals by means of a sensor for the position of the cross-cutting device, feeding the periodically generated signals to the control device and associating them with the signals of the second scanning device, regulating with the aid of the control device the phase between the signals of the first scanning device and the signals of the second scanning device to a fixed value, and transmitting signals from the control device to actuators for setting the cutting register.

Method for setting the cutting register on a cross-cutting device

Drive for a printing press with a plurality of printing units connected to one another by a gear train, each of the printing units being associated with a motor for supplying power to the gear train, includes a control device for receiving information regarding a register deviation between two of the printing units of the printing press operating at an existing power ratio and, in accordance with the information, changing the existing power ratio of the two drive motors so as to correct the register deviation between the two drive motors.

Drive for a printing press with a plurality of printing units

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 the elements which do not transport stock; all of the sensors being connected to the control and regulating device.

Drive for a printing press

A drive system for a printing machine with a plurality of printing units connected to one another via a gear train into which power is fed at different points by at least two motors, includes supplying each of the motors via a respective controllable, line-commutated converter. A signal is generated by each of the converters that is limited in time between two firing pulses. A current setpoint value is transferred only within a time span in which all of the converters have activated the signal. Coverage of all of the signals which are limited in time is assured in all operating states.

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Angelbachtal, Germany

Georg Rossler