Printing – Inkers – Roller
Patent
1984-07-11
1986-04-15
Pearson, Charles A.
Printing
Inkers
Roller
101365, B41F 3104, B41F 3106
Patent
active
045819947
ABSTRACT:
An automatic control system for a zonal ink metering device displaces ink metering elements toward a fountain roller until contact of the individual elements with the fountain roller is detected to establish absolute reference positions. Then the ink metering elements are displaced away from the fountain roller by respective predetermined amounts to obtain a desired ink profile. Once the desired ink profile is obtained, continuous printing is started. During continuous printing, the ink profile is maintained by periodically and sequentially reciprocating one individual ink metering element after another into contact with the fountain roller to reset their respective reference positions. Preferably, contact of the individual ink metering elements with the fountain roller is detected by a pair of electrical contacts in the adjusting devices for the ink metering elements. Preferably, a predetermined biasing force is applied urging the ink metering elements into contact with the fountain roller, and the adjusting mechanism applies force through the electrical contacts to displace the ink metering elements away from the fountain roller. Preferably, the ink metering elements are ink slides and electrical contact and force transmission occurs between a contact plate mounted via a rigid insulator to a substantially fixed support and the end of a threaded spindle engaging a nut fixed to the ink slide. Thus, when closure of the electrical contacts occur, the contact plate becomes grounded.
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Galster et al. U.S. patent application Ser. No. 543,407 (Oct. 1983).
M.A.N.--Roland Druckmaschinen Aktiengesellschaft
Pearson Charles A.
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