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AssigneeHeidelberger Druckmaschinen AG
InventorsStephen Franklin, Martin John Callahan, Wolfgang Schönberger
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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.
A printing press, comprising 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 said screen roller, and a drive device, said screen roller and said other roller being drivingly coupled with one another so that, after each revolution of said screen roller, a pattern depicted by said printing medium on said other roller in a form of printing medium accumulations has a slight offset, in circumferential direction, with respect to a pattern depicted on said other roller during a preceding revolution of said screen roller, so that the new printing medium accumulations are positionable on said other roller in at least approximately printing-medium free gaps between, respectively, adjacent printing medium residual accumulations.
A method of operating an inking unit having a screen roller in co-operative engagement with another roller, the screen roller having, on the circumference thereof, a pattern formed of depressions fillable with a printing medium, which comprises rotating the screen roller and the other roller in a manner coordinated with one another so that after each revolution of the screen roller, the 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 new printing medium accumulations are positionable on the other roller in at least approximately printing-medium free gaps between respectively adjacent printing medium residual accumulations.
Dependencies are inferred from the claim text.