Device for controlling by a measuring technique, dampening medium guidance zonewise in an inking unit for an offset printing machine
AssigneeHeidelberger Druckmaschinen AG
InventorsWilli Jeschke, Dimitrios Pyliotis
Life of this patent
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Abstract
A device for controlling, by a measuring technique, the dampening medium guidance zonewise in an inking unit of an offset printing machine includes a measuring roller engaging an ink applicator roller of the inking unit and having interfaced oleophilic and hydrophilic surface regions, and an optoelectronic measuring device disposed adjacent to the measuring roller and operating thereon over the entire width thereof at a spaced distance therefrom, and wherein at least the oleophilic surface regions of the measuring roller is formed as a screen.
Claims12
Device for providing a zonewise dampening medium guidance signal in an inking unit of an offset printing machine, comprising a measuring roller engaging an ink applicator roller of the inking unit and having partly oleophilic and partly hydrophilic surface regions, and an opto-electronic measuring device disposed adjacent to said measuring roller and operating thereon over the entire width thereof at a spaced distance therefrom for generating said guidance signal, and wherein at least the oleophilic surface regions of said measuring roller is formed as a screen on the hydrophilic regions.
Apparatus for zonewise measurement of the dampening fluid supply in an offset printing machine, having a measuring roller in engagement with an ink-transfer roller, the measuring roller comprising:
- interlaced part hydrophilic and part oleophilic surface regions and at least one measuring sensor for scanningly measuring the dampening fluid/ink balance along the entire axial length of the measuring roller, and wherein the oleophilic surface regions of the measuring roller occupy, measured in circumferential direction, a continuously diminishing percentage of the total surface, said percentage diminishing from 100% to 0%.
Dependencies are inferred from the claim text.