B - Operations – Transporting – 41 – F
Patent
B - Operations, Transporting
41
F
101/101
B41F 31/00 (2006.01) B41F 7/24 (2006.01) B41F 33/00 (2006.01)
Patent
CA 1209856
ABSTRACT A device for the ink-profile sensitive regulation of the damping solution in an offset printing unit which supplies, over the width of the type-forme, a damping-solution film of equal thickness to the plate cylinder and the inking unit. An essential characteristic of this device is a hydrophilic measuring roller which is in contact with one of the inking-unit rollers. Located in the vicinity of the measuring roller is a measuring device which determines the wetting of the measuring-roller jacket section by section over the entire width of the measuring roller. Also provided is a special device for changing section by section the proportion of the damping solution in the inking unit, and a control part which converts the signals from the measuring device into actuating commands and applies them to the device for changing section by section the proportion of the damping solution. The purpose of the device is to achieve the most uniform possible ink-water emulsion in the inking unit, regardless of the ink-profile and local heating, and over the width of the machine. This is intended to have a positive effect upon starting conditions.
428727
Heidelberger Druckmaschinen Aktiengesellschaft
Johnson Douglas S. Q.c.
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