Abstract:
The present invention concerns a device and a method for controlling and adjusting printing parameters such as printing density and colorimetric parameters in printing machine, in particular flexographic printing machines. The printing parameters are modified by controlling the ink viscosity with an inductive heater (6) added to the anilox roller (10).
Abstract:
The present invention concerns an inking for a flexographic or a rotogravure press. The inking system has an ink recirculation circuit (50) coupled with an ink source (62) made of two tanks with two different inks. Thanks to feedback given by measuring (71) 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 of the temperature. Also, the inking system has an inductive heater (100) to control the temperature of the anilox or the gravure cylinder (1) to obtain the optimal ink viscosity, which might change according to the different inking mixtures.
Abstract:
The present invention discloses a printing unit (1) with an automated sleeve change process. A sleeve (40) can be prepared for the next printing job while the current job is running, thereby reducing the changeover time. Also, the printing unit can handle printing sleeves of very different sizes without any special additional adjustments to be made. The printing unit (1) translates the printing roller (102, 202) and the inking roller (8) on a horizontal line (30) to engage and dis-engage the printing roller. The invention is convenient for large printing sleeves because the sleeve can be slipped over a shaft that remains in the unit. The setup results in a very rigid system, which guarantees an excellent printing quality.
Abstract:
The present invention concerns a printing unit provided with an engraved printing roller (1) and a relative method for controlling and adjusting printing parameters such as printing density and colorimetric parameters in printing machine, in particular flexographic printing machines.
Abstract:
The invention relates to the field of printing apparatusses, in particular flexographic printing apparatusses, and more specifically relates to an apparatus (1) and method for mounting a printing plate (2) on a printing cylinder (4) or a printing sleeve, comprising a system for pre-alignment (5, 8) of a printing plate (2) and real-time alignment (5, 8) of the said printing plate (2) during mounting.