Lucent Technologies Inc.

Heidelberger Druckmaschinen Ag

Marcus Putzer

Hans Schadl

Markus Brachmann

Hans-Joachim Goetz

Thomas Eckart

In a method for operating a rotary printing press, preferably a flexographic printing press that processes webs, disturbances of a rotating printing cylinder are detected and reduced by changing the printing speed. Here, the disturbances are detected at an actuating drive of the printing cylinder. This leads to a cost-efficient way of printing without disturbances.

Method of operating a rotary printing press

Clock recovery from transmitted data signals is carried out entirely digitally, and in a manner that is essentially insensitive to dynamic changes in the phase of the data signal. To this end, at least four phase-shifted sample signals are produced from a predetermined time signal. At least two of these phase-shifted sample signals are selected as a function of the respective phase angles with respect to the data signal, and in each case are supplied separately to a device for time sampling of the data signal with the selected sample signal. One of the devices in each case is connected to an output device for the data signal as a function of the respective phase separations between the data signal and the selected phase-shifted sample signals.

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Pleystein, Germany

Marcus Putzer