METHOD OF PRINTING PRINTED PRODUCTS USING PRINTING NOZZLES WITHOUT DEFECTS AND DEFECTIVE NOZZLES THAT HAVE BEEN COMPENSATED FOR

A method of printing improved printed products using defect-free printing machine nozzles and compensated defective nozzles includes printing products and a test chart with test fields onto a transported substrate, the test fields having tonal values, every test field including an unprinted line fro...

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Bibliographic Details
Main Authors Köhler, Hans, Tita, Ralf
Format Patent
LanguageEnglish
Published 03.08.2023
Subjects
CALCULATING
COMPUTING
CORRECTION OF TYPOGRAPHICAL ERRORS
COUNTING
i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
LINING MACHINES
PERFORMING OPERATIONS
PHYSICS
PRINTING
SELECTIVE PRINTING MECHANISMS
STAMPS
TRANSPORTING
TYPEWRITERS
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Summary:A method of printing improved printed products using defect-free printing machine nozzles and compensated defective nozzles includes printing products and a test chart with test fields onto a transported substrate, the test fields having tonal values, every test field including an unprinted line from a nonactivated, nonprinting nozzle compensated by a neighboring nozzle having a compensation value, pairs of tonal value and compensation value being specified and used for the chart, recording an image of the chart, computer-analyzing the image and determining the compensation value. Every pair of tonal value and compensation value is used multiple times in the chart and a corresponding number of spaced apart test fields is created. A characteristic value representing test field homogeneity and determining compensation value quality is assigned to every measuring field. The best characteristic value regarding a specified criterion and the compensation value is determined for every tonal value.
Bibliography:Application Number: US202318156772