Spray dampening valves with associated drive signals in an offset printing process

Spray dampening valves with associated drive signals in an offset printing process

An embodiment of the present method and apparatus may have: a printing unit having a plurality of spraybar assemblies; each of the spraybar assemblies having a respective plurality of spray valves; a controller that outputs respective predetermined control signals of a plurality of control signals f...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: HILL COREY, NIEMIRO MICHAEL A
Format: Patent
Sprache:eng
Schlagworte:
ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES
APPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING, OR PRINTINGFOR OFFICE OR OTHER COMMERCIAL PURPOSES
LINING MACHINES
PERFORMING OPERATIONS
PRINTING
STAMPS
TRANSPORTING
TYPEWRITERS
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Beschreibung
Zusammenfassung:An embodiment of the present method and apparatus may have: a printing unit having a plurality of spraybar assemblies; each of the spraybar assemblies having a respective plurality of spray valves; a controller that outputs respective predetermined control signals of a plurality of control signals for the plurality of spray valves in each of the spraybar assembly; and each control signal of the plurality of control signals having a series of positive and negative pulses; wherein residual magnetism is substantially minimized in the spray valves by the occurrence of positive and negative pulses.