Abstract: The present invention relates to an ink-jet print heads protecting system in a digital printing machine, wherein the module comprises a chassis (1), rollers (2), and a plurality of digital printing units (10), each with a bridge (11) with guides (12) and a sliding carriage (13) with ink-jet print heads (14), one part of each guide overlapping the band and another part projecting beyond the band path, the carriage being movable between the printing and maintenance positions; and in that each bridge is attached to the chassis by a position adjustment device (20) and an articulation (25) that are spaced apart or by two position adjustment devices (20) that are spaced apart.

Abstract: The present invention relates to a method for controlling the operation of a printing press and a flexographic printing press for implementing said method, wherein the method comprises performing the following steps: a) capturing information from at least one image printed by said printing press; and b) comparing said information captured from said printed image with at least some digital-format information predetermined in prepress, or digital prepress information, including at least one part of the image to be printed. The method comprises adjusting the pressure and/or register setting of one or more printing units of the printing press, using at least the result of the comparison in said step b). The press is designed in order to implement the method.

Abstract: The present invention relates to a method for controlling the operation of a printing press and a flexographic printing press for implementing said method, wherein the method comprises performing the following steps: a) capturing information from at least one image printed by said printing press; and b) comparing said information captured from said printed image with at least some digital-format information predetermined in prepress, or digital prepress information, including at least one part of the image to be printed. The method comprises adjusting the pressure and/or register setting of one or more printing units of the printing press, using at least the result of the comparison in said step b). The press is designed in order to implement the method.

Abstract: The winding machine is intended for plastic, laminated, aluminum, paper and self-adhesive materials and comprises two winding shafts (10, 11) which are each provided with a direct-drive motor (13, 14) and which are mounted on a plate (15) that is rotationally supported with respect to a vertical wall (16a) of a framing (16). The plate (15) has associated guides (50, 51) and drive means for moving the motors (13, 14) and shafts (10, 11) linearly with respect to the plate (15). The second end of each winding shaft (10,11) is supported by a carriage (40, 41) that can move in guides (44, 45) provided on a wall (16b), each carriage (40, 41) including a clamp (42, 43) that holds the ends of the winding shafts (10, 11) in a horizontal plane during the formation of a reel on any of said winding shafts (10, 11) and as the reel is moved into an unloading position.

Abstract: The printing machine (50) comprises a central impression drum (35) supporting a web substrate (S), several printing groups (51-55) arranged around an entry side (35a) and several printing groups (56-60) arranged around an exit side (35b) of the central impression drum for applying water-based inks or solvent-based inks on the web substrate (S), and at least one drying unit (61-69) arranged between each pair of adjacent printing groups. The first drying unit located in a larger space between the first printing group (51) and the subsequent printing group (53) and/or the last drying unit located in a larger space between the last printing group (60) and the preceding printing group (58) is an extensive drying unit (61, 69) providing an exposure time to a drying agent longer than the remaining drying units.

Abstract: The system for applying a printing liquid or a printing auxiliary liquid to a rotogravure roller comprises a vat (B) containing an adhesive, lacquer or varnish (L) constituting the printing liquid or printing auxiliary liquid, a closed-chamber doctor blade device (D) communicating with the inside of the vat (B) by means of conduits (C1-C5) forming a closed circuit configured and arranged so as to extract the adhesive, lacquer or varnish (L) from the vat (B) through a first conduit (C1) and to apply same on the outer surface of the rotogravure roller (R), and to remove the leftover adhesive, lacquer or varnish (L) from the closed-chamber doctor blade device (D) and return same to the vat (B) through a second conduit (C2), and a viscosimeter (V) in fluid communication with the inside of the conduits (C1-C5) for measuring the viscosity of the adhesive, lacquer or varnish (L) flowing therethrough.

Abstract: The printing machine (50) comprises a central impression drum (35) supporting a web substrate (S), several printing groups (51-55) arranged around an entry side (35a) and several printing groups (56-60) arranged around an exit side (35b) of the central impression drum for applying water-based inks or solvent-based inks on the web substrate (S), and at least one drying unit (61-69) arranged between each pair of adjacent printing groups. The first drying unit located in a larger space between the first printing group (51) and the subsequent printing group (53) and/or the last drying unit located in a larger space between the last printing group (60) and the preceding printing group (58) is an extensive drying unit (61, 69) providing an exposure time to a drying agent longer than the remaining drying units.

Abstract: The present invention relates to a scraper device for a printing machine which comprises a scraper body (20) having longitudinal blades (2) and lateral sealing elements, and having ink inlet and outlet passages (24). The scraper body (20) is supported by a scraper support (10) adjacent to an inking roller of a printing machine, and having ink supply and discharge passages (11) connected to respective ink supply and discharge conduits of an ink circulation device. Positioning and fixing means allow fixing the scraper body (20) to the scraper support (10) in an operating position in which openings (24a) of said ink inlet and outlet passages (24) of the scraper body (20) are in fluid communication with openings (11a) of said ink supply and discharge passages (11) of the scraper support (10).

Abstract: The winding machine is intended for plastic, laminated, aluminum, paper and self-adhesive materials and comprises two winding shafts (10, 11) which are each provided with a direct-drive motor (13, 14) and which are mounted on a plate (15) that is rotationally supported with respect to a vertical wall (16a) of a framing (16). The plate (15) has associated guides (50, 51) and drive means for moving the motors (13, 14) and shafts (10, 11) linearly with respect to the plate (15). The second end of each winding shaft (10,11) is supported by a carriage (40, 41) that can move in guides (44, 45) provided on a wall (16b), each carriage (40, 41) including a clamp (42, 43) that holds the ends of the winding shafts (10, 11) in a horizontal plane during the formation of a reel on any of said winding shafts (10, 11) and as the reel is moved into an unloading position.

Abstract: The present invention relates to a scraper device for a printing machine which comprises a scraper body (20) having longitudinal blades (2) and lateral sealing elements, and having ink inlet and outlet passages (24). The scraper body (20) is supported by a scraper support (10) adjacent to an inking roller of a printing machine, and having ink supply and discharge passages (11) connected to respective ink supply and discharge conduits of an ink circulation device. Positioning and fixing means allow fixing the scraper body (20) to the scraper support (10) in an operating position in which openings (24a) of said ink inlet and outlet passages (24) of the scraper body (20) are in fluid communication with openings (11a) of said ink supply and discharge passages (11) of the scraper support (10).

Abstract: The device comprises at least one safety screen (3) linked to a fixed structure (10) of a printer (40) through first guide elements (2a, 2b, 2c, 2d) installed in said fixed structure (10) and complementary second guide elements (3a, 3b) installed in the screen (3) for allowing a linear movement of the screen (3) between a safe position, wherein the screen (3) prevents the access to a hazardous area of the printer (40), and a withdrawn position, wherein the screen (3) is withdrawn from said hazardous area, and an electronic safety device (4a, 4b) in connection with an electronic safety module configured for deactivating or stopping the movement of any element of the printer (40) in the hazardous area if the screen (3) is not in said safe position.

Abstract: The printing device using energy-curable inks is applicable to a flexographic printer comprising a printing deck (21) adapted for printing an energy-curable printing ink containing as the components, resin, pigment and a non-reactive evaporable component selected from water or another solvent, on a substrate layer (23) supported on a backpressure roller (24), and an energy emitting unit for curing said ink printed on the substrate layer (23). The printing deck (21) includes an ink application chamber (13) for applying the ink to an inking roller (11) arranged for inking-up a printing roller (12), and means for supplying printing ink from a container (1) to the corresponding ink application chamber (13). The device comprises means for maintaining the ratio of the components of the printing ink substantially constant.

Abstract: The invention relates to a method of cleaning doctor devices (10) of inking units in a printer, comprising emptying the ink from an ink chamber, through feed (11) and drainage (12) tubes, into an ink tank (13) and supplying solvent into said ink chamber, followed by emptying said solvent form the ink chamber, carrying out all of said actions by using a dynamic fluid pump (15), with a first and second diaphragms of different sizes, one of the faces thereof defining respective pumping (15a) and suction (15b) chambers, said suction chamber (15b) having a greater volumetric capacity. In said method the ink is circulated for emptying by means of said pumping (15a) and suction (15b) chambers, the former being used in reverse, and solvent is supplied by entering said pumping chamber (15a) and exiting through said suction chamber (15b).