Abstract: A method of on-press development of a lithographic printing plate having an imaged photosensitive (PS) coating by (a) applying an emulsive film of press ink and fountain onto the entire PS coating; (b) transferring all nonimage areas of the inked PS coating and all of the ink film on the nonimage areas of the PS coating from the plate to a blanket roll while the image areas of the PS coating remain on the substrate, wherein the nonimage areas are transferred to the blanket roll in particulate form without dissolution or dispersion in any ink or fountain; and (c) contacting the blanket roll with a paper leader to further transfer all the ink, fountain water, and particles of nonimage PS coating that were transferred to the blanket roll, from the blanket roll to the paper leader.

Abstract: A roll for distributing printing liquid in a printing press is provided. The roll includes a roll core having at least a first and a second axial zone, a first liquid feed for feeding liquid to the first axial zone, a second liquid feed for feeding the liquid to the second axial zone independent of the first axial zone and a porous shell covering the first and second axial zones. A printing press, a method for providing printing liquid through a porous shell of a printing liquid supply roll to a cylinder of a printing press, an inking apparatus and a method for providing ink to an anilox roll are also provided.

Abstract: A printing unit is provided. The printing unit includes an ink feed system, a plate cylinder and an inker having multiple rollers and a belt wrapped around the rollers. The belt accepts ink from the ink feed system and transfers the ink to the plate cylinder. A method of printing and an inker are also provided.

Abstract: A printing unit includes a press unit having a forme cylinder, a transfer cylinder, an inking unit and, preferably, a damping unit. The inking unit of each press unit applies printing ink to a forme cylinder of the respective press unit in such a way that a ductor roll of an inking unit picks up printing ink kept ready in an ink fountain and applies it to the forme cylinder of the respective press unit by a film roll interacting with the ductor roll, inking unit rolls arranged downstream of the film roll, and at least one ink applicator roll rolling on the forme cylinder. Inking unit rolls driven in rotation and inking unit rolls driven in oscillation are are driven independently from one another on the drive side.

Abstract: In a printing press, ink fountain keys are disposed to be movable toward and away from an ink fountain roller of an ink fountain to allow them to have a predetermined gap therebetween and hence the amount of ink to be fed to a downstream roller to be determined. The ink fountain roller is rotated while ink is prevented from being fed to the downstream roller. At least one of the ink fountain keys is moved so as to allow the at least one of the fountain keys to change a position thereof relative to the ink fountain roller of the ink fountain with time. With this arrangement, it is possible to improve an ink kneading effect produced by the rotation of the ink fountain roller without the necessity to manually knead ink in the ink fountain by the operator and the necessity to provide any ink kneading device or unit independently of the printing press.

Abstract: A printing press ink transfer mechanism includes a primary flow metering device to monitor the flow ink supply and a secondary flow metering device to monitor the return flow of the ink to the supply. The difference in ink flow between the supply and return is delivered to the application rollers of a printing press.

Abstract: A color ink supply device for an ink ductor in a rotary printing press achieves an even color distribution on the ink ductor. A plurality of ink supply devices are arranged axially along the ink ductor. Each ink supply device includes a main chamber and may also include a pre-chamber. A doctor blade device may also be utilized.

Abstract: An inking control system for a printing machine has an operating panel with operating and display elements for adjusting the zonally acting ink distribution devices in the printing machine. A spacing distribution along a given direction and a number of the operating and display elements corresponds to a spacing distribution and a number of the ink zones in the printing machine. A full size color monitor is integrated in the operating panel. The color monitor is enabled to display a full-size printed image on a scale of 1:1 and to spatially correlate the display of the printed image with the operating and display elements to directly visually associate the inking zones in the displayed printed image with the operating and display elements. One or more image recording devices in the printing machine record printed images while the printing material is conveyed through the printing machine.

Abstract: An offset printer capable of contacting a plurality of ink rollers of a predetermined ink supply unit with a predetermined plate segment on a plate cylinder, and capable of out of contacting the ink rollers from a remaining plate segment on the plate cylinder. Roller support arms each supporting each ink roller are pivotally movably supported on a frame, and each support arm is moved by each, cam members pivotally movably supported on the frame. Each cam member is in contact with a center cam provided coaxially with and rotatable together with the plate cylinder, so that the ink rollers are successively moved. An interlocking mechanism including a lever is further provided. The lever moves concurrently the cam members to concurrently move the ink rollers.

Abstract: A sample of printing ink for a printing press is obtained using actual press components. An anilox roll for the press is supplied with ink and is rotated while the anilox roll is either mounted on the press or mounted off-line from the press. A printable substrate is printed with the ink either by pressing the substrate directly against the anilox roll or by pressing a transfer roll against the anilox roll and pressing the substrate against the transfer roll. The ink on the substrate is inspected, and any necessary changes to the ink are made before the press run is started.

Abstract: An inker unit for a printing unit of a web-fed rotary printing press has a pair of ink application rollers in direct contact with a forme cylinder and with a central, ink receiving roller. A pair of inking rollers are also in direct contact with the ink receiving roller, and in indirect contact with the ink application rollers through riding rollers. The ink application rollers are thus inked both directly and indirectly from the ink receiving roller.