Automatically controlling water feedrate on a lithographic press
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United States of America Patent
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-
Nov 27, 1990
Grant Date -
N/A
app pub date -
Apr 29, 1985
filing date -
Apr 29, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a method for automatically controlling the water feedrate on a lithographic press which includes a blanket cylinder, a plate cylinder, inking rollers and dampening rollers. The temperature of the fountain solution is regulated so as to be constant. The alcohol concentration is regulated so as to be constant. The ink film thickness on one of the inking rollers is sensed to provide a signal proportional to that variable. The sensing of the ink film thickness on the inking roller is used to determine the water feedrate to the plate cylinder and the rate of water feed is dependent upon the ink film thickness.
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