Abstract: Ink is supplied to a plate cylinder (9) from an ink transfer cylinder. Two ink metering rollers (10, 13) are associated with the transfer cylinder, and in surface engagement therewith. The nip or engagement gap of the rollers (10, 13) with respect to the transfer cylinder (7) is adjustable. One of the two rollers (10) is supported with an additional positioning arrangement (8, 19, 20) to adjust the gap or nip of that one roller with respect to the other measuring or metering roller (13). The respective measuring or metering rollers are independently driven, such that the surface speed of the first metering roller, which has ink applied thereto, is counter the direction of rotation of the transfer cylinder (7), and the other metering roller is driven at a surface speed which is higher than that of the transfer cylinder but in the same direction of rotation. Ink is applied to the first metering roller (10) by an ink application roller (3) which has ink applied thereto, for example from an ink trough.

Abstract: To permit replacement of a cylinder bearer ring without disassembly of the respective cylinder from the printing machine, the cylinder bearer ring is constructed as a composite element assembled of two parts 1, 9; one of the parts has a central, generally U-shaped cut-out to surround the shaft of the associated cylinder, the width of the cut-out being at least as large as the width of the diameter of the shaft; the other part, 9, fits into the cut-out and is formed with a central part-circular recess to surround the shaft. The two parts 1, 9, when interfitted, surround the shaft and form a continuous circular outline and thus a continuous bearer ring. The parts are secured together by bolts.

Abstract: To prevent center sag, or bowing of printing cylinders, and thus uneven printing throughout the axial length thereof, extension struts are connected to stub shafts at the ends of the cylinders, the struts being connected together to form a closed, rectangular or square frame in which the individual lengths of the struts are adjustable to thereby provide individually adjusted forces to the ends of the stub shafts and counteract sag or bow of the cylinders.