The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 18, 1992
Filed:
Feb. 12, 1990
Jurgen Pflasterer, Dossenheim, DE;
Norbert Freyer, Sandhausen, DE;
Heidelberger Druckmaschinen AG, Heidelberg, DE;
Abstract
A process for controlling the inking of printed products, wherein an original provided with ink control fields, is subjected to a colorimetric measurement includes colorimetrically measuring diffuse-reflectance of at least one three-color screen field of the original and computing and storing a setpoint color locus therefrom spectrally measuring color-related diffuse-reflectance values and diffuse-reflectance values of a three-color screen field by measuring control fields on a printed sheet which has been produced in a set-up phase, calculating an actual color locus from the spectral diffuse reflectance of the three-color screen field, taking into account a distance between the setpoint color locus and the actual color locus, and taking into account preset inking values and machine-specific characteristic curves, calculating a theoretical actual color locus from the measured color-related diffuse-reflection values, repeatedly calculating the theoretical actual color locus, if necessary, with the respective ink deviation until the deviation is at a minimum, and basing the production run on the thus obtained inking values.