B - Operations – Transporting – 41 – F
Patent
B - Operations, Transporting
41
F
101/75
B41F 5/16 (2006.01) B41F 13/14 (2006.01) B41F 33/16 (2006.01)
Patent
CA 1208971
ABSTRACT OF THE DISCLOSURE The functional relationship between the torque delivered by the motor or a quantity characteristic of the torque and the register adjustment necessary for maintaining perfect register is recorded and stored in a memory 15 in order to prevent register errors in multi-colour rotary prin- ting presses, particularly in multi-colour offset printing presses, whose printing units are driven by a common motor and exhibit a register adjusting device. While the press is running the torque delivered by the motor or the quantity characteristic thereof is monitored and the register adjust- ment is set to the value functionally assigned to the re- spective torque. Since the functional relationship between torque and register adjustment is a characteristic of the respective printing press, the printer can bring the printed images exhibiting various colours into perfect register with the printing press running at low speed and can then run the press up to the desired printing rate without there being any register errors because such errors are prevented by the register adjustment which, as the speed of the press increases, is carried out as a function of the increasing torque in accordance with the previously determined functional relationship.
417182
Heidelberger Druckmaschinen Aktiengesellschaft
Johnson Douglas S. Q.c.
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