Inking system with embedded colour correction
AssigneeBobst Firenze S.R.L.
InventorFederico D'ANNUNZIO
Life of this patent
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Abstract
The present invention concerns an inking for a flexographic or a rotogravure press. The inking system uses a very small amount of ink coupled with an ink source made of two tanks with two different inks. Thanks to feedback given by measuring the output directly on the printed support, the system mixes the ink in the optimal proportions to ensure an optimal printing quality at any time. It can compensate any effect due to environmental changes like the humidity or the temperature. This system, coupled with a seven colours press allows for the replacement of spot colours in most cases thereby saving times and costs.
Claims12
An inking system for a rotary printing unit and for the adjustment of printing parameters, the printing machine being configured to print on a printing support, the inking system comprising
- an inking cylinder and an etched cylinder arranged to retain ink between them in a nip area and configured to turn in a same direction;
- an ink source comprising two tanks for storing ink and suitable for drawing ink from the two tanks in configurable amounts;
- a sensor configured to obtain a measured value of the printing parameters on the printing support;
- control means adapted to compare the measured value of the printing parameters with a target value;
- wherein the ink source is configured to be operatively connected to the control means whereby, when the measured value of the printing parameters differs from the target value, the ink source is activated by the control means to provide ink from the two tanks in corrected relative amounts to the nip area.
Dependencies are inferred from the claim text.