EP 0842769 B1 20010718 - Control device for a printing machine drive
Title (en)
Control device for a printing machine drive
Title (de)
Steuerung für den Antrieb einer Druckmaschine
Title (fr)
Dispositif de commande pour un moteur d'entraînement d'une machine à imprimer
Publication
Application
Priority
DE 19643252 A 19961019
Abstract (en)
[origin: US5878665A] A control system for controlling the rotational speed of the printing cylinders of a printing machine in order to eliminate register offset or doubling phenomena on the printed matter. The control system uses one or more sensors to determine the operating condition of the printing unit. The relevant operating condition parameters include the frequency of the AC line from which the printing machine operates and the position of the printing cylinders at the time the change in rotational speed is to occur. Based on the operating condition of the printing unit, a controller selects an appropriate timing ramp for increasing or decreasing the rotational speed of the printing cylinders. The various timing ramps are stored on a memory and correspond to the different operating conditions of the printing unit. Once, the appropriate timing ramp has been selected, the controller controls the rotational speed of the drive motor that rotates the printing cylinders in a manner that is proportional to the rate of change and duration characteristics of the selected timing ramp.
IPC 1-7
IPC 8 full level
B41F 13/004 (2006.01); B41F 33/00 (2006.01); B41F 33/10 (2006.01)
CPC (source: EP US)
B41F 13/0045 (2013.01 - EP US); B41F 33/0009 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE FR GB LI SE
DOCDB simple family (publication)
US 5878665 A 19990309; AT E203204 T1 20010815; DE 19643252 A1 19980430; DE 19643252 C2 19990520; DE 59704066 D1 20010823; EP 0842769 A1 19980520; EP 0842769 B1 20010718; JP H10119248 A 19980512
DOCDB simple family (application)
US 95329997 A 19971017; AT 97116687 T 19970925; DE 19643252 A 19961019; DE 59704066 T 19970925; EP 97116687 A 19970925; JP 28702597 A 19971020