Patent · US Active

Density fluctuation compensation during print head replacement

US10906296B2 · kind B2 · utility

0Cited by

0References

7Claims

0Family size

Assignee

Heidelberger Druckmaschinen AG · DE

Inventors

Sepideh Samadzadegan · Leimen, DE
Hans Koehler · Graz, AT
Nikolaus Pfeiffer · Dover, US
Annika Kamper · Dossenheim, DE

Key dates

Filing date	Sep 26, 2019
Grant date	Feb 2, 2021
Priority date	—
Expiry date	Sep 26, 2039

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB41J2025/008
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A method compensates for position-dependent density fluctuations of print nozzles in an inkjet printing machine by use of a computer. The computer produces compensation profiles for the position-dependent density fluctuations over all the print heads for all print substrates used, calculates an mean profile from these, and applies the mean profile to compensate for the position-dependent density fluctuations in the inkjet printing machine. When one or more print heads of the inkjet printing machine are replaced, the computer calculates a new compensation profile for only one print substrate. The computer derives a new mean profile from this, and the computer calculates and applies the new mean profile using the old compensation profiles for the remaining print substrates.

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