A coating device for supplying a liquid to a substrate, particularly in the form of an optionally printed web, foil, strip or sheet, comprises a reservoir for holding a quantity of liquid. Coating means are provided which are able and configured to take liquid from the reservoir and transfer it to the substrate. Supply means deliver the liquid into the reservoir during operation. The supply means are controllable and are able to lead a constant liquid flow into the reservoir. The reservoir is provided with level detecting means which are able and configured to detect a liquid level in the reservoir. Provided between the level detecting means and the coating means is a control which controls the coating means during operation on the basis of a detection (LS) of the liquid level in the reservoir in order to maintain the liquid level at a fixed 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.

A method for direct transfer printing is disclosed. The method for direct transfer printing includes applying a fountain solution to an imaging blanket in a negative imagewise manner using an inkjet printhead, contacting the imaging blanket with a printing substrate, transferring the fountain solution from the imaging blanket to the printing substrate, contacting the printing substrate with an inking station, and depositing an ink film from the inking station to the printing substrate in one or more locations on the printing substrate where there is no fountain solution. A module for a direct transfer marking process and a direct transfer printing system are also disclosed.

A method for direct transfer printing is disclosed. The method for direct transfer printing includes applying a fountain solution to an imaging blanket in a negative imagewise manner using an inkjet printhead, contacting the imaging blanket with a printing substrate, transferring the fountain solution from the imaging blanket to the printing substrate, contacting the printing substrate with an inking station, and depositing an ink film from the inking station to the printing substrate in one or more locations on the printing substrate where there is no fountain solution. A module for a direct transfer marking process and a direct transfer printing system are also disclosed.

A device for setting at least one operating parameter of ink for a printing process of a rotary printing press having an inking system which has a doctor blade device with a doctor blade chamber containing the ink for the printing process, and an ink reservoir from which ink can be supplied to the doctor blade chamber, includes a supply system which allows ink to be supplied inside the inking system. The supply system can be switched to a setting mode (I) or to a production mode (II), the operating parameter being automatically set in the setting mode (I) and no ink being supplied to the doctor blade chamber, and the supply system supplying ink to the doctor blade chamber in the production mode (II).

A device for setting at least one operating parameter of ink for a printing process of a rotary printing press having an inking system which has a doctor blade device with a doctor blade chamber containing the ink for the printing process, and an ink reservoir from which ink can be supplied to the doctor blade chamber, includes a supply system which allows ink to be supplied inside the inking system. The supply system can be switched to a setting mode (I) or to a production mode (II), the operating parameter being automatically set in the setting mode (I) and no ink being supplied to the doctor blade chamber, and the supply system supplying ink to the doctor blade chamber in the production mode (II).

A heating circuit having an array of switching heating elements (e.g., field effect transistors, thin film transistors) provides a transient heat pattern over a surface (e.g., substrate, imaging member surface, transfer roll surface) moving relative to the heating circuit, to produce a pixelated heat image and heat a target pattern on the surface. Heat is generated by current flow in the heating elements, and the power developed by the heating circuit is the product of source-drain voltage and current in the channel. Digital addressing may accomplished by matrix addressing the array. Current may be supplied along data address lines by an external voltage controlled by digital electronics understood by a skilled artisan to provide the desired heat at a respective heating element pixels addressed by a specific gate line. The circuit may include a current return line that may be low resistance, for example, by using a 2-dimensional mesh.

In some examples, an ink feed system for providing and feeding printing ink to an inking unit of an intaglio printing unit includes an inking device in the inking unit for inking a first inking unit cylinder. A provision device includes a storage receptacle with an ink reservoir of printing ink that is fed via an outlet and a line to the inking device. Furthermore, a wall of the storage receptacle encompassing the outlet can be heated and/or a metering device may be provided in the line path to support and/or effectuate delivery of the printing ink from the storage receptacle. On an output side, the metering device may provide a mass flow or volume flow that correlates with a working speed of the metering device via a defined relationship, and the metering device may be connected to a control device to control the working speed of the metering device.

In some examples, an ink feed system for providing and feeding printing ink to an inking unit of an intaglio printing unit includes an inking device in the inking unit for inking a first inking unit cylinder. A provision device includes a storage receptacle with an ink reservoir of printing ink that is fed via an outlet and a line to the inking device. Furthermore, a wall of the storage receptacle encompassing the outlet can be heated and/or a metering device may be provided in the line path to support and/or effectuate delivery of the printing ink from the storage receptacle. On an output side, the metering device may provide a mass flow or volume flow that correlates with a working speed of the metering device via a defined relationship, and the metering device may be connected to a control device to control the working speed of the metering device.

Based on evaporation of fountain solution from a rotating blanket cylinder to create an image that may be inked and printed, a digitally addressable heater array at or just below the blanket surface evaporates deposited fountain solution and forms a fountain solution latent image on the surface. The heater array has controllable heating elements (e.g., field effect transistors, thin film transistors) that provide a transient heat pattern on the surface to evaporate the fountain solution. Heat is generated by current flow in the heating elements, and power developed by the heating circuit is the product of source-drain voltage and current in the channel. Current may be supplied along data lines by an external voltage controlled by digital electronics to provide the desired heat at heating elements addressed by a specific gate line. The heater array may include a current return line that may be a 2-dimensional mesh.