Abstract: In connection with a method for characterization of a layer, a method and a device for determining a characteristic number, as well as a method for selecting a suitable dressing on rollers, or suitable geomtries of rollers of a printing press, a characterizing number for characterizing a layer is formed, or employed, which characterizes the roll-off behavior independently of a measuring device or an application in a particular printing group.

Abstract: A blanket is located on an outer surface of a roller, such as printing unit roller. The blanket has an elastic and/or a compressive layer with a surface pressure that depends on the degree of the impression. The layer is selected so that a depending of the surface pressure on the impression has, at least in some areas, a slope of less than 700 (N/cm2)/mm.

Abstract: The invention relates to a method for engaging and disengaging cylinders, in particular cylinders (03; 07) that are disposed in a line. According to the invention, in addition to the displacement required for engaging and disengaging the cylinders, steps are taken to at least reduce the relative tangential speed between the working outer surfaces of the cylinders that are to be engaged against one another or against an intermediate web (08). This is achieved by the release of, or impression upon a specific rotation.

Abstract: At least two cylinders (02, 03, 07, 11) are arranged in a printing machine, whereby a respective end journal (23, 51) of the cylinders is mounted in or on a common insert (28), which in turn is detachably located in or on a lateral frame (27) of said printing machine.

Abstract: In connection with a method for characterization of a layer, a method and a device for determining a characteristic number, as well as a method for selecting a suitable dressing on rollers, or suitable geometries of rollers of a printing press, a characterizing number for characterizing a layer is formed, or employed, which characterizes the roll-off behavior independently of a measuring device or an application in a particular printing group.

Abstract: A printing group of a printing machine is comprised of a pair of cylinders each having a circumference that corresponds essentially to a length of a section of a side to be printed. The effective generated surface of at least one of the cylinders comprises, at the most, one break in the circumferential direction. The surface forms, in the longitudinal direction, a plurality of adjacently arranged breaks which, when viewed in the circumferential direction, are arranged in a staggered manner with respect to each other.

Abstract: The invention relates to a printing group pertaining to a printing machine, comprising at least two cylinders, i.e. a form cylinder and a transfer cylinder. Said transfer cylinder can be optionally brought into a print-on position or a print-off position along a linear adjustment path. Both cylinders can be driven in a mechanically rotating manner, independently from another printing group, by means of at least one drive motor arranged on the frame in a fixed mode.