A method includes the steps of: a) printing a first print job on a printing machine using a printing fluid, a substrate, a specified ICC profile, and a first machine setting; b) preparing the printing operation of a second print job involving a change of the printing fluid and/or of the substrate; and c) printing the second print job using a second combination of printing fluid and substrate. Step b) includes: b1) printing a test print having a plurality of test fields; b2) recording the test fields; b3) computationally determining and saving a quality value based on the test fields; b4) determining and saving an adjustment value for a machine setting; and b5) selectively changing a printing machine setting from the first machine setting to a second machine setting using the adjustment value or keeping the first printing machine setting, and the making a choice based on a quality value.

Disclosed is a corrugated paperboard printer comprising a pressing device for applying a pressing force to press a chamber which reserves ink toward an anilox roll. The pressing device is configured to apply a first pressing force, and a second pressing force which is greater than the first pressing force, respectively, to a first pressing area and a second pressing area in a back surface of a chamber frame. In a state in which no pressing force is applied by the pressing device, bending occurring in the chamber frame due to a load transmitted from a printing roll to the chamber frame via the anilox roll as printing is performed to a corrugated paperboard sheet is greater in the second pressing area than in the first pressing area.

For accelerated setting of a quantity of ink in an inking unit of an offset printing unit, it is proposed to maximise the quantity of ink transported out of an ink duct of the inking unit over an ink duct roller (1) and a lifting roller (6) into the inking unit during the adjustment of ink metering elements (3) which determine the metering of the ink in terms of the quantity thereof on the ink duct roller.

The supply unit is used in a printing device including a printing head configured to perform printing process of a viscous fluid on a printing target using a screen mask, a collection section having a collection member configured to contact the screen mask to collect and move the viscous fluid and a collecting and moving section configured to move the collection member in a predetermined printing direction. The supply unit includes a supply section having a mounting section capable of mounting and dismounting a cartridge accommodating the viscous fluid, a driving section configured to move the supply section in the supply operation direction, a detection member, and a supply section detecting section configured to detect whether the supply section is positioned in a passage space where the collection section and the supply section do not contact each other by the position of the detection member.

Disclosed is a corrugated paperboard printer comprising a pressing device for applying a pressing force to press a chamber which reserves ink toward an anilox roll. The pressing device is configured to apply a first pressing force, and a second pressing force which is greater than the first pressing force, respectively, to a first pressing area and a second pressing area in a back surface of a chamber frame. In a state in which no pressing force is applied by the pressing device, bending occurring in the chamber frame due to a load transmitted from a printing roll to the chamber frame via the anilox roll as printing is performed to a corrugated paperboard sheet is greater in the second pressing area than in the first pressing area.

The supply unit is used in a printing device including a printing head configured to perform printing process of a viscous fluid on a printing target using a screen mask, a collection section having a collection member configured to contact the screen mask to collect and move the viscous fluid and a collecting and moving section configured to move the collection member in a predetermined printing direction. The supply unit includes a supply section having a mounting section capable of mounting and dismounting a cartridge accommodating the viscous fluid, a driving section configured to move the supply section in the supply operation direction, a detection member, and a supply section detecting section configured to detect whether the supply section is positioned in a passage space where the collection section and the supply section do not contact each other by the position of the detection member.

A method includes the steps of: a) printing a first print job on a printing machine using a printing fluid, a substrate, a specified ICC profile, and a first machine setting; b) preparing the printing operation of a second print job involving a change of the printing fluid and/or of the substrate; and c) printing the second print job using a second combination of printing fluid and substrate. Step b) includes: b1) printing a test print having a plurality of test fields; b2) recording the test fields; b3) computationally determining and saving a quality value based on the test fields; b4) determining and saving an adjustment value for a machine setting; and b5) selectively changing a printing machine setting from the first machine setting to a second machine setting using the adjustment value or keeping the first printing machine setting, and the making a choice based on a quality value.

A method includes the steps of: a) printing a first print job on a printing machine using a printing fluid, a substrate, a specified ICC profile, and a first machine setting; b) preparing the printing operation of a second print job involving a change of the printing fluid and/or of the substrate; and c) printing the second print job using a second combination of printing fluid and substrate. Step b) includes: b1) printing a test print having a plurality of test fields; b2) recording the test fields; b3) computationally determining and saving a quality value based on the test fields; b4) determining and saving an adjustment value for a machine setting; and b5) selectively changing a printing machine setting from the first machine setting to a second machine setting using the adjustment value or keeping the first printing machine setting, and the making a choice based on a quality value.

A method for operating a device for printing hollow cylinder is provided. The device comprises a rotating segmented wheel with a plurality of printing cylinders arranged successively along the periphery of the device. A plurality of plate cylinders are provided in association with the segmented wheel. According to a printing process to be performed, a selected quantity of plate cylinders is thrown onto the segment wheel or is thrown off the segment wheel. In a first printing process, a first partial quantity of thrown-on plate cylinders transfers printing ink to a plurality of the printing blankets arranged on the segment wheel. At the end of the printing process, at least some of the plate cylinders, that were thrown on the segment wheel in the first printing process, are thrown off the rotating segment wheel. During constant uninterrupted rotation of the segment wheel, for the implementation of a second printing process, a second partial quantity of plate cylinders is thrown onto the segment wheel and respectively transfer printing ink to a plurality of the printing blankets arranged on the segment wheel. The respective printing forme of at least one plate cylinder involved in the first printing process, and uninvolved in the ongoing second printing process, is changed during the ongoing printing process.

A screen-printing unit in a printing machine comprises a screen cylinder which carries a screen-printing stencil and in which a squeegee is moved, from the inside, into contact with, and away from the screen-printing stencil. The screen cylinder is moved into contact with an impression cylinder, such that a printing position is formed, and is moved away therefrom, such that a gap is formed. The screen cylinder is moved away from the impression cylinder, in a first phase, when the squeegee is in a non-contacting position. In a second phase, at least one sheet of printing material is passed through the printing position when the squeegee continues to be in a non-contacting position and the screen cylinder is at least temporarily in a contacting position. For subsequent sheets of printing material, in a third phase, the screen-printing unit is operated with the squeegee one of permanently and cyclically, such as at least once for each sheet of printing material, in a contacting position.