| 摘要 |
A printing press includes an inking unit provided with a screen roller having, on a circumference thereof, a pattern formed of depressions fillable with a printing medium, another roller co-operatively engageable with the screen roller, and a drive device, the screen roller and the other roller being drivingly coupled with one another so that, after each revolution of the screen roller, a pattern depicted by the printing medium on the other roller in a form of printing medium accumulations has a slight offset, in circumferential direction, with respect to a pattern depicted on the other roller during a preceding revolution of the screen roller, so that the new printing medium accumulations are positionable on the other roller in at least approximately printing-medium free gaps in, respectively, adjacent printing medium residual accumulations; and a method of operating the printing unit.
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