Boots – shoes – and leggings
Patent
1994-10-21
1996-06-25
Trammell, James
Boots, shoes, and leggings
356425, 101365, 101211, G01J 300
Patent
active
055306560
ABSTRACT:
A method for controlling the ink feed of a printing machine, especially an offset printing machine, for printing four-color half-tone combined prints. In selected test regions in an original and in the corresponding test regions in the printed sheet, the standard color values of the four-color overprint are determined. The infrared color density for the black printing ink is determined in the near infrared. The standard color values of the four-color overprint are converted by means of a linear transformation into standard color values corresponding to the combined print of only the three chromatic colors. The coefficients of the linear transformation are determined empirically as a function of the infrared color density of the black printing ink. From the standard color values of the three-color print, the effective surface coverage values of the three chromatic colors are determined via the modified Neugebauer equations. The effective surface coverage value of the black ink is determined from the infrared color density according to an empirical relationship. The settings for the ink feed elements of the printing machine are adjusted according to the differences in the effective surface coverage values between the original and the printed product.
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US-Z: Research Disclosure, Jun. 1992, pp. 460, 461.
MAN Roland Druckmaschinen AG
Trammell James
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