Patent · US Active

Method for detecting and compensating for defective printing nozzles in an inkjet printing machine for reducing unusable prints

US11292269B2 · kind B2 · utility

0Cited by

1References

5Claims

0Family size

Assignee

Heidelberger Druckmaschinen AG · DE

Inventors

Ilias Trachanas · Plankstadt, DE
Mina Hakim Latif Abosetta · Mannheim, DE
Andreas Fehlner · Mannheim, DE

Key dates

Filing date	Feb 9, 2021
Grant date	Apr 5, 2022
Priority date	—
Expiry date	Feb 9, 2041

Classification

Technology area (CPC G)Physics
CPC primaryG06T2207/30144
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A method for detecting and compensating for defective printing nozzles in an inkjet printing machine includes printing test sheets each including at least one printing nozzle test chart and at least one gray area for every color separation. The test sheets are recorded and digitized with subsequent pixel-nozzle mapping and amplitude/phase value determination by using a computer. Current measurements are taken at the printing nozzles in between test sheets and customer sheets while being printed. The computer is used for teaching in a SVM model with the results of the current measurement and pixel-nozzle mapping and amplitude/phase determination. The taught-in SVM model and the current measurements are applied to printed, recorded and digitized customer's images to detect defective printing nozzles during production printing on the inkjet printing machine and the detected defective printing nozzles are compensated for.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.