Abstract: There is described a printing unit (1) for use in an offset machine. The printing unit enables wider application of offset machines (1). This is achieved by the coating means and the water application means comprising a unit (28) consisting of a doctor blade (30) and at least one roller (29, 32) for transferring coating or water from the doctor blade (30) to the plate cylinder (15)/blanket cylinder (14) of the printing unit. The unit (28) is arranged for pivoting so that water is transferred to plate cylinder, and coating is transferred directly to the blanket cylinder.

Abstract: A doctor blade system with clamping device is provided for clamping a doctor blade, for example, in a doctor blade chamber without using screws and without having to use tools. A clamping mechanism, preferably pneumatic, counteracts the clamping by actuation. By disposing a sectional rail between the clamping rail and the doctor beam, the sectional rail drawing the clamping rail and the beam together with a spring mechanism, the doctor blade is clamped between the clamping rail and the beam. In another embodiment, the clamping rail is designed as an angular section tipping about an edge.