Abstract: The invention relates to a paper coloring apparatus for especially water colors or water-based inks, wherein a driven running paper web is positioned around a turning roller constituting the counter-pressure roller for an inker and, together with the latter, are included in a roller train adapted to convey ink from a reservoir to the inker. The last roller in the roller train is at least partially immersed in the ink reservoir and is independently rotatable for conveying ink to the next adjacent roller in the roller train. According to the invention, the rest of the roller train is adapted to be driven by the running paper web.

Abstract: A rotary printing press comprising a matrix mounted on a matrix cylinder, at least one inking roller and a counterpressure cylinder. The press includes flexible members and pneumatic cylinders operative between supports for the cylinders and rollers, which are arranged to compensate for variations in thicknesses of the matrix and/or the paper.

Abstract: A paper coloring apparatus particularly for rotation printing presses and, ordinarily for the coloring of white paper to the desired color before the paper web (2) is drawn into the printing press. The paper web (2) passes over several guide rollers (3, 4, 5) plus a displaceable roller (8) which can be displaced towards and away from a coloring roller (10). The coloring roller (10) is supplied with dye from a dye bath (12) via a dye roller (13) which communicates with dye bath (12), and a displaceable intermediate roller (14) which can be displaced towards and away from engagement with the dye roller (13) and coloring roller (10). The displaceable rollers (8, 14) are displaced with the aid of compressed air cylinders (11, 15), and the pressure of the displaceable rollers (8, 14) against the counter-rotating rollers (10, 13) is regulated with the aid of regulation valves in the appropriate compressed air circuits.