Abstract: A rotogravure printing unit includes a forme cylinder and an inker unit. The inker unit includes a trough which holds liquid or pasty ink. A first inking roller, which can rotate inside the trough, extends over a first width section of the trough and the forme cylinder. A second inking roller, which can also rotate inside the trough, extends over a second width section of the forme cylinder or the trough.

Abstract: An inking unit for the printing couple of a double width printing press includes at least one roller. The inking unit consists of at least one, and possibly two chamber doctor blades. If there are two such chamber doctor blades, they are positioned side-by-side in an axial direction of the roller and they can operate independently of each other. If there is only one chamber doctor blade, it can have a length sufficient to enable the side-by-side positioning of at least four newspaper pages. The chamber doctor blade or blades can be positioned against or out of contact with the roller.

Abstract: A liquid ink imaging member having a top outer imaging surface is provided for receiving image forming ink droplets from a printhead. The liquid ink imaging member includes (a) a substrate member; (b) at least one elastomeric layer formed over the substrate member and including the top outer imaging surface; and (c) a surface texture formed into the top outer imaging surface and comprising asperities spaced apart at most from about one-half to about one pixel spot size for providing contact angle hysteresis to pin image forming ink droplets received thereon, thereby preventing ink droplet drawback, and resulting in quality images.

Abstract: A cylinder of a rotary printing machine has a peripheral surface which is divided into at least two segments that are situated adjacent to each other, in an axial direction of the cylinder, by a circumferential groove. Those circumferential grooves can be closed by the placement in the groove of a suitable inlay or insert element. That inlay or insert element is formed of several parts, typically of two inlay or insert parts, whose peripheral surfaces complement each other to form a continuous cylindrical peripheral surface on the cylinder after the inlay or insert parts have been placed in the grooves.

Abstract: A device for controlling delivery of an amount of fluid has a first rotating device having at least one peripheral first fluid transfer section, a second rotating device having at least one peripheral second fluid transfer section, and a device for setting a phase between the first and second fluid transfer sections. The device may be used for providing ink or dampening solution in a printing press.

Abstract: The invention relates to a cylinder for a rotary printing machine, whose peripheral surface has at least two cylindrical segments (07, 08) next to one another, which are separated from one another by a groove (09) located therebetween, wherein the groove can be closed by an inlay element (11, 12) that can be releasably fixed to form a continuos surface area. The inlay element is formed by several parts, especially two inlay parts, whose peripheral surfaces complement each other to form a cylindrical peripheral surface after the inlay part has been placed in the groove.

Abstract: A roller is formed of at least two adjacent roller barrels. Each of the roller barrels has its own shaft that defines an axis of rotation for its associated roller barrel. The axes of rotation of the several roller barrels can be independently positioned. A support is located between the two roller barrels and supports the shafts of the two adjacent barrels. This central support is able to be adjusted.

Abstract: Disclosed are various embodiments of an ink roller assembly with a capillary ink metering unit and a surrounding porous ink retaining sleeve, wherein the unit is comprised of a pair of capillary sections connected to each other and wherein capillary sections include a hollow shaft and discs with intervening ink capillary chambers interconnected by passages. In another embodiment, a capillary ink metering unit includes discs on a solid shaft, wherein there are passages interconnecting capillary chambers. In yet other embodiments, separate sections are provided to enable inks of different colors, viscosities and/or types to be applied to printing members. There is also provision to meter ink to printing members having different faces or areas in accordance with or as function of the sizes of those areas. The ink roller assembly with separate sections can carry both visible ink and visually alterable ink for coding purposes.

Abstract: Various embodiments of an ink roller assembly include a capillary ink metering unit and a surrounding porous ink retaining sleeve, wherein the unit is comprised of a pair of capillary sections connected to each other and wherein capillary sections include a hollow shaft and discs with intervening ink capillary chambers interconnected by passages. In another embodiment, a capillary ink metering unit includes discs on a solid shaft, wherein there are passages interconnecting capillary chambers. In yet other embodiments, separate sections are provided to enable inks of different colors, viscosities and/or types to be applied to printing members. There is also provision to meter ink to printing members having different faces or areas in accordance with or as function of the sizes of those areas. The ink roller assembly with separate sections can carry both visible ink and visually alterable ink for coding purposes.