Method for controlling the ink guidance in a printing machine

Details Method for controlling the ink guidance in a printing machine Method for controlling the ink guidance in a printing machine

1994-12-22

1996-09-03

Fisher, J. Reed

Printing

Processes

Condition responsive

101485, 101365, B41F 3105

Patent

active

055513425

ABSTRACT:
A method for controlling the ink guidance of a printing machine, especially a sheet-fed offset printing machine. Ink-density spectra are recorded by means of a spectral photometer at a plurality of image points of the original and of the printed copy and the differential ink-density spectra are determined from these values. These differential ink-density spectra are then represented as a linear combination of the individual ink-density spectra of the inks participating in the composite printing. Regulating commands for the ink-guide members of the printing machine are thereupon derived from the proportionality factors of this linear combination.

REFERENCES:
patent: 4649502 (1987-03-01), Keller et al.
patent: 5224421 (1993-07-01), Doherty

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