Method for regulating dampening agent

Details Method for regulating dampening agent Method for regulating dampening agent

1996-05-20

1998-02-03

Fisher, J. Reed

Printing

Planographic

Processes of lithographic printing

101138, 101147, B41F 724

Patent

active

057132860

ABSTRACT:
The amount of a dampening agent applied to a printing unit is regulated by sensing the light reflected from several unprinted areas of a web that has passed through the printing unit. The reflectance of a center blank strip is used as a reference and the reflectance of adjacent strips are compared to this reference. Dampening fluid is regulated on the basis of this comparison.

REFERENCES:
patent: 5050994 (1991-09-01), Kipphan et al.
patent: 5258925 (1993-11-01), Maier et al.
patent: 5341734 (1994-08-01), Jeschke et al.
patent: 5520113 (1996-05-01), Joss et al.

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