A device for printing hollow bodies includes a rubber blanket cylinder. A supply device, which guides the hollow bodies to the rubber blanket cylinder, is provided. The supply device comprises a mandrel which is rotated by a drive. One of the hollow bodies to be printed is arranged coaxially on the mandrel. An axial spacing between the mandrel and the rubber blanket cylinder can be changed as a result of an adjusting movement of the supply device. The adjusting movement of the supply device is a linear adjusting movement. The supply device is configured as a linear system which radially supplies the hollow bodies to the rubber blanket cylinder individually and one after the other. The supply device has multiple different positions, each of which places the respective hollow body to be printed, along the adjustment path of the supply device. The positions are arranged at different respective radial distances with respect to the rubber blanket cylinder.

A wiping member is configured to wipe a nozzle forming surface of a liquid ejecting head, which has nozzles through which a liquid is ejected, in a first direction. The wiping member includes a fibrous material and is configured to satisfy the following:
a+3af+3f where f is an average of sizes of spaces between fibers in the first direction, f is a standard deviation of the sizes of the spaces, a is an average of sizes of aggregation substances formed of a solute in the liquid adhered to the nozzle forming surface in the first direction, and a is a standard deviation of the sizes of the aggregation substances.

The invention relates to a rotary printing press (10) for printing substrates (18), comprising a substrate transport system (12) which comprises a winder station (14) and an unwinder station (16) configured to transport a substrate (18) during a printing process along a printing handling path (19) from the unwinder station (16) to the winder station (14), wherein the rotary printing press (10) further comprises at least one cleaning unit (46) which is assigned to the printing handling path (19) and adapted to remove ink from the front side of the substrate (18). Further, the invention relates to a method for cleaning a substrate (18).

The present disclosure relates to cleaning a surface in a printing device, wherein a steam guiding member directs a steam flow towards the surface; wherein the steam flow interacts with a substance on said surface to clean a portion of the surface.

A wiping member is configured to wipe a nozzle forming surface of a liquid ejecting head, which has nozzles through which a liquid is ejected, in a first direction. The wiping member includes a fibrous material and is configured to satisfy the following:

a+3af+3f where f is an average of sizes of spaces between fibers in the first direction, f is a standard deviation of the sizes of the spaces, a is an average of sizes of aggregation substances formed of a solute in the liquid adhered to the nozzle forming surface in the first direction, and a is a standard deviation of the sizes of the aggregation substances.

An apparatus comprises a plate cleaner assembly. The plate cleaner assembly further comprises a frame, a roller coupled to the frame, a dry cleaning material coupled to the roller, and a spray assembly coupled to the plate cleaner assembly. The plate cleaner assembly further includes a controller coupled thereto. Moreover, the apparatus further comprises a printing plate cylinder and a printing plate coupled to the printing plate cylinder.

A printing apparatus applies ink to a surface of a printing plate in the shape of a predetermined pattern and then transfers the ink to a substrate. The printing apparatus includes: an image recording section that applies the ink to the surface of the printing plate; a plate surface observation unit that acquires information about the surface of the printing plate; a storage section that stores information about a reference shape serving as a reference of the surface of the printing plate; and a determination section that compares the information about the reference shape stored in the storage section with the information about the surface of the printing plate, which is obtained by the plate surface observation unit, and determines whether or not the surface of the printing plate to which the ink has been applied is present in a predetermined range of the reference shape.

A screen cleaning apparatus (2) and method, wherein: a screen cleaning head (3) is operative to contact a surface of a printing screen (PS), the screen cleaning head (3) includes a screen contact element (17) over which a cleaning sheet (7) is in use disposed, the screen contact element (17) comprises a first section (17a), which is configured to support one of a dry section or a wet section of the cleaning sheet (7) thereabove, a second, vacuum section (17b), at which a vacuum is provided to draw a vacuum therethrough, and a third section (17c), which is configured to support the other of a wet section or a dry section of the cleaning sheet thereabove; and a support (11) to which the cleaning head (3) is supported and which is movable over the surface of the printing screen (PS) to provide for cleaning of the same.

A roll of cleaning fabric is used for cleaning printing cylinders of a printing system. The cleaning fabric (13) is impregnated with a cleaning composition containing an organic solvent and a cellulose solubilizer. The roll may be wound around a core (14) and inserted in a removable sealing bag (15) configured to seal around the roll (12) of cleaning fabric (13) in order to prevent the cleaning composition from evaporating before use.

A method for cleaning a rotating surface of a printing press cylinder or a rotating surface of a printing press roller, or a rotating surface of a print form or a transfer form arranged on a printing press cylinder within a printing unit includes the steps of: applying a liquid, water-based washing agent, containing at least 60% water and the rest at least surfactants, onto the surface to be cleaned within the printing unit; dissolving contaminations from the surface to be cleaned within the printing unit with the help of the washing agent and a cleaning device; and removing the dissolved contaminations from the surface to be cleaned within the printing unit, at least with the help of the cleaning device.