A method for determining vertical misalignment between first and second print heads involves printing a test pattern of first and second alternating slanted blocks extending horizontally. The first slanted blocks are printed by the first print head and the second slanted blocks are printed by the second...http://www.google.fr/patents/US6478401?utm_source=gb-gplus-shareBrevet US6478401 - Method for determining vertical misalignment between printer print heads
Method for determining vertical misalignment between printer print heads
