Method for controlling the inking of a printing press by determi

Details Method for controlling the inking of a printing press by determi Method for controlling the inking of a printing press by determi

1998-11-06

2000-01-11

Asher, Kimberly L.

Printing

Inkers

Fountains

395109, 395104, 101366, 347 5, 347 6, 347 19, B41F 104

Patent

active

060123907

ABSTRACT:
Method and apparatus for the determination of the color value gradients of a picture element of a printed image when there are changes in the layer thicknesses of the inks used in the printing, the picture element (4) is photo-electrically scanned in the visible range of the spectrum and also in the near infrared range. From the scanning signals thereby obtained, color coordinates or an approximated subjectively equidistant color system and at least one infrared value is formed. The color value gradients are then calculated from these color coordinates and the at least one infrared value.

REFERENCES:
patent: 4975862 (1990-12-01), Keller et al.
patent: 5023812 (1991-06-01), Pfeiffer
patent: 5182721 (1993-01-01), Kipphan et al.
patent: 5530656 (1996-06-01), Six
patent: 5724437 (1998-03-01), Bucher et al.
patent: 5791251 (1998-08-01), Kistler et al.
patent: 5841955 (1998-11-01), Wang
patent: 5854680 (1998-12-01), Rakitsch
W.E.S.T. 1.0 English Abstract for EP 95649, Derwent, Jeschke et al., 1983.

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