FIELD: printing.
SUBSTANCE: method of feeding of at least two inks for machine for printing flat elements, equipped with at least two printing devices, comprising the steps on which the first label of the first ink is printed on the flat element, using the first printing device; the second label of the first ink is printed on the element at a distance from the first label, using the first printing device; the third label of the second ink is printed on the element, using the second printing device; the fourth label of the second ink is printed on the element at a distance from the third label, using the second printing device; the first and the third labels and the second and the fourth labels are detected on the element, the position deviation is determined between the first and third printed labels and they are compared with the known theoretical position deviation between the first and third labels, the position deviation is determined between the second and fourth labels and they are compared with the known theoretical position deviation between the second and fourth labels; the adjusting signal for the second printing device is generated depending on the detected deviations; the second printing device is adjusted depending on the generated signal for feeding the second ink with respect to the first ink.
EFFECT: improvement of the device.
15 cl, 7 dwg
