Printing machine

Printing – Multicolor – Rotary machines

Patent

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Details

B41F 706, B41F 502, B41F 522

Patent

active

059271957

ABSTRACT:
A printing machine is disclosed, in particular a sheet-fed offset printing machine, in which a plurality of cylinders are coupled to one another via a continuous drive train, and at least two cylinders include a controllable drive. The controllable drive stresses the drive train in order affect the tooth-flank contact of the gear train, which affects the angular position of the printing cylinders. By controlling the angular positions of the printing cylinders, precise registration is maintained during dynamic changes in the load on the gear train during the printing process. More specifically, blanket cylinders in the printing machine are each coupled to a position-controllable drive, which is controlled by applying a preferred position value in such a way that the gear train placed between two drives is stressed by a predefined angular amount.

REFERENCES:
patent: 4581993 (1986-04-01), Schoneberger
patent: 4980623 (1990-12-01), Anton
patent: 5127324 (1992-07-01), Palmatier et al.
patent: 5309834 (1994-05-01), Koch
patent: 5377589 (1995-01-01), Kruger et al.
patent: 5398603 (1995-03-01), Hartmann

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