Abstract: A structural underblanket unit (10) for blanket cylinders (100) of printing machines, comprising a first layer (11) made of rubber, a second layer (12) made of polyester and a third layer (13) made of fabric. The layers (11, 12, 13) are solidly bonded to one another so as to define a multilayer structural unit (10) having an overall transversal thickness (S) corresponding to the sum of the transversal thicknesses (S11, S12, S13) of said layers, the order of bonding of said layers being any whatsoever. A process for adjusting a distance of a printing blanket (101) from a wall (102) of a blanket cylinder of a printing machine.

Abstract: The system (1) for impregnating, with a solvent (2), a fabric (3) for cleaning the blanket and the metal printing cylinder of a printing machine includes at least one tank (4) suitable for being filled up to a certain level (9) with the solvent and at least one impregnating roller (6) placed in the tank in a position suitable for being partially immersed in the solvent, the impregnating roller having a coating made of a material having properties of resistance to the corrosion induced by the solvent and sufficient interfacial tension with the solvent to deliver a uniform micrometric film (11) of solvent toward the cleaning fabric, there being provided above the filling level of the tank an area of contact (8) between the impregnating roller and the cleaning fabric wherein the direction of the peripheral velocity to which the impregnating roller is subjectable is opposite to the direction of the feed velocity to which the cleaning fabric is subjectable, so that the impregnating roller, when driven in rotation,

Abstract: Described is a pre-packaged cleaning system for cylinders of printing machines (1), comprising at least one roll (2) of fabric pre-impregnated with solvent and designed for being associated with at least one cylinder of a printing machine and a wrapper (3) wound around the roll. The wrapper (3) comprises at least one supporting layer (4) and at least one layer (5) impermeable to the solvent and superposed on the supporting layer (4).