Abstract: An engraved ink transfer cylinder for a flexographic printing press, wherein the roller body (12) is clamped detachably on a continuous axle (22) and surrounds this axle (22) at a distance.

Abstract: A flexographic printing press with a back-pressure cylinder (10) and at least one inking unit (12, 14, 16), which has an exchangeable printing cylinder (20), which can be placed against the back-pressure cylinder (10), an engraved ink transfer cylinder (24; 38), which can be placed against the printing cylinder and a chamber doctor blade (26), which can be placed against engraved ink transfer cylinder, wherein a washing cylinder (34) is constructed to be inserted in the inking unit (12, 14, 16) instead of the printing cylinder (20) and to apply cleaning liquid to the surface of the back-pressure cylinder (10).

Abstract: A method of exchanging a printing cylinder sleeve in a printing machine, which printing machine comprises a central cylinder and a plurality of ink units adapted to be adjusted against the central cylinder, each ink unit comprising a plate cylinder having a printing cylinder sleeve mounted on a mandrel, and a detachable bearing for supporting the mandrel, the method comprising the following steps, which are performed while the printing machine is running: moving the plate cylinder away from the central cylinder to such an extent that a space formed between the plate cylinder and the central cylinder becomes large enough for gripping the printing cylinder sleeve, detaching the bearing, and withdrawing the printing cylinder sleeve axially from the mandrel.

Abstract: A printing cylinder with a cylinder core (10), on which a carbon fiber-containing casing (20) is disposed, wherein the casing (20) is self-supporting and held at a distance from the peripheral surface (18) of the cylinder core (10) by disks (22) disposed at the two ends.

Abstract: A method of exchanging a printing cylinder sleeve in a printing machine,

Abstract: A flexographic printing press with a back-pressure cylinder (10) and at least one inking unit (12, 14, 16), which has an exchangeable printing cylinder (20), which can be placed against the back-pressure cylinder (10), an engraved ink transfer cylinder (24; 38), which can be placed against the printing cylinder and a chamber doctor blade (26), which can be placed against engraved ink transfer cylinder, wherein a washing cylinder (34) is constructed to be inserted in the inking unit (12, 14, 16) instead of the printing cylinder (20) and to apply cleaning liquid to the surface of the back-pressure cylinder (10).

Abstract: A printing cylinder with a cylinder core (10), on which a carbon fiber-containing casing (20) is disposed, wherein the casing (20) is self-supporting and held at a distance from the peripheral surface (18) of the cylinder core (10) by disks (22) disposed at the two ends.

Abstract: An engraved ink transfer cylinder for a flexographic printing press, wherein the roller body (12) is clamped detachably on a continuous axle (22) and surrounds this axle (22) at a distance.

Abstract: A printing machine with a cylinder sleeve (16), which can be rotationally driven and is supported at both ends with protruding axle journals (18) directly in the machine frame (10, 12), and with a shaft (22), which passes through the cylinder sleeve and can be driven along with it, such that the rotational driving takes place over the shaft (22) and the cylinder sleeve (16) can be set axially against a torque transfer element (28), which is seated on the shaft.

Abstract: A drive clutch for connecting a drive shaft (12) with an exchangeable cylinder (10) of a printing machine, such that, at one end of the cylinder (10), a locking part (24) is provided and that, in or on the drive shaft, a spanner (32) is disposed, which has a recess (38), which opens up radially and into which the locking part (24) can be introduced positively, and that the spanner (32) can be retracted axially, in order to pull the cylinder (10) with the help of the locking part (24) against the end of the drive shaft (12).

Abstract: Apparatus for detecting collisions in a printing machine having at least one rotationally driveable rotary body (18; 20) and an actuator (28; 30) for adjusting the rotary body in a direction normal to the axis of rotation, the apparatus including a torque sensor (T) and/or an angle increment sensor (&OHgr;) for detecting the driving torque and/or the rotary speed of the rotary body (18; 20), and a control unit (38) adapted to detect a collision of the rotary body with another component member on the basis of the signal of the torque or angle increment sensor and to stop the actuator (28; 30) thereupon.

Abstract: A printing machine with preferably several inking units, which are disposed on a common back-pressure cylinder (12), with in each case at least one roll body (16, 18), which is held with its two opposite ends in two bearing blocks (22, 24) that can be moved approximately radially with respect to the back-pressure cylinder, and is held with its one end in a hinged bearing (42), fastened to the bearing block (22) there, while it is clamped with its other end in a cantilever manner in a holding device (26), it being possible to move the holding device and the hinged bearing in such a manner relative to one another that, after the hinged bearing is lifted up, the roll body can be moved out of this bearing and then removed in an axial direction, characterized in that the hinged bearing (42), in the lifted-up state, is open in the direction of movement of the associated bearing block (22) and, by moving this bearing block in the direction approximately radial to the back-pressure cylinder (12), can be moved into th

Abstract: A printing machine with preferably several inking units, which are disposed on a common back-pressure cylinder (12), with in each case at least one roll body (16, 18), which is held with its two opposite ends in two bearing blocks (22, 24) that can be moved approximately radially with respect to the back-pressure cylinder, and is held with its one end in a hinged bearing (42), fastened to the bearing block (22) there, while it is clamped with its other end in a cantilever manner in a holding device (26), it being possible to move the holding device and the hinged bearing in such a manner relative to one another that, after the hinged bearing is lifted up, the roll body can be moved out of this bearing and then removed in an axial direction, characterized in that the hinged bearing (42), in the lifted-up state, is open in the direction of movement of the associated bearing block (22) and, by moving this bearing block in the direction approximately radial to the back-pressure cylinder (12), can be moved into th

Abstract: A flexographic printing press with one or several color printing units (12), which are disposed at the periphery of a common back pressure cylinder (10) and, in each case, have an impression cylinder (14; 14') and an applicator roll (16) and the impression cylinder of which can be driven independently of the back pressure cylinder, characterized in that each applicator roll (16) can be driven over a gear assembly (32, 40; 32') with a fixed transmission ratio by a central wheel (24) fixed on the shaft (22) of the back pressure cylinder (10).