| 摘要 |
A method of automatically adjusting the printing pressure in flexographic printing machines is disclosed. The method is applied to flexographic machines with a rotating support drum around which a series of printing units with a series of printing rollers associated to respective ink rollers are arranged, and includes carrying out for each printing unit: detecting the start and the end of one mark (M1) printed with a printing roller and the angular positions of one or more rollers of the printing unit to which the printing roller belongs, and based on the detections establishing the size (Td) of the mark; comparing the detected size (Td) with a predetermined size (Tr) of the mark (M1) which is representative of a good print quality, and if the sizes are not equal adjusting the pressure of the printing roller which has printed the mark (M1) and of the associated ink roller.
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