Abstract: Variable format offset printing machine having a central impression cylinder The printing machine comprises a central impression cylinder (1) on which a web printable substrate (B) is supported and a plurality of printing stations arranged around the central impression cylinder (1). Each printing station comprises a blanket cylinder (2) of variable diameter, a plate cylinder (3) of variable diameter, and an offset inking unit (4). Said blanket cylinder (2), plate cylinder (3) and offset inking unit (4) are individually movable between respective withdraw positions and respective multiple working positions for different diameters of the blanket and plate cylinders (2, 3). At least one of said printing stations has the axis of the blanket cylinder (2) and the axis of the plate cylinder (3) comprised in an inclined first plane (P1) which does not comprise the axis of the central impression cylinder (1) at any of said multiple working positions for different diameters of the blanket and plate cylinders (2, 3).

Abstract: Variable format offset printing machine having a central impression cylinder The printing machine comprises a central impression cylinder (1) on which a web printable substrate (B) is supported and a plurality of printing stations arranged around the central impression cylinder (1). Each printing station comprises a blanket cylinder (2) of variable diameter, a plate cylinder (3) of variable diameter, and an offset inking unit (4). Said blanket cylinder (2), plate cylinder (3) and offset inking unit (4) are individually movable between respective withdraw positions and respective multiple working positions for different diameters of the blanket and plate cylinders (2, 3). At least one of said printing stations has the axis of the blanket cylinder (2) and the axis of the plate cylinder (3) comprised in an inclined first plane (P1) which does not comprise the axis of the central impression cylinder (1) at any of said multiple working positions for different diameters of the blanket and plate cylinders (2, 3).

Abstract: The printing machine has a central impression cylinder (1) on which a web printable substrate (B) is supported and a plurality of printing stations arranged around the central impression cylinder (1). Each printing station includes a blanket cylinder (2) of variable diameter, a plate cylinder (3) of variable diameter, and an offset inking unit (4). The blanket cylinder (2), plate cylinder (3) and offset inking unit (4) are individually movable between respective withdrawn positions and respective multiple working positions for different diameters of the blanket and plate cylinders (2, 3). At least one of the printing stations has the axis of the blanket cylinder (2) and the axis of the plate cylinder (3) in an inclined first plane (P1), which does not include the axis of the central impression cylinder (1) at any of the multiple working positions for different diameters of the blanket and plate cylinders (2, 3).

Abstract: The printing machine comprises a central impression cylinder (1) on which a web printable substrate (B) is supported and a plurality of printing stations arranged around the central impression cylinder (1). Each printing station comprises a blanket cylinder (2) of variable diameter, a plate cylinder (3) of variable diameter, and an offset inking unit (4). Said blanket cylinder (2), plate cylinder (3) and offset inking unit (4) are individually movable between respective withdraw positions and respective multiple working positions for different diameters of the blanket and plate cylinders (2, 3). At least one of said printing stations has the axis of the blanket cylinder (2) and the axis of the plate cylinder (3) comprised in an inclined first plane (P1) which does not comprise the axis of the central impression cylinder (1) at any of said multiple working positions for different diameters of the blanket and plate cylinders (2, 3).

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).