摘要:
Printing groups are each comprised of at least two cooperating cylinders, each of which is mounted in a bearing unit that radially displaces its associated cylinder. At least one of these bearing units is provided with an actuator which is controlled, or regulated by a control unit. An inking unit, which encompasses at least one ink application roller, is provided for each printing group. At least one of the cylinders of the printing group, and an ink application roller of the associated inking unit can optionally be placed against each other. A dampening unit, comprising at least one dampening fluid application roller, is also provided. At least one of the cylinders of the printing group and a dampening fluid application roller of the dampening unit are also optionally placed against each other. The at least one actuator for the bearing unit is remotely controlled and is embodied either as a hydraulic actuator or as a pneumatic actuator.
摘要:
An inking system of a printing press is utilized for inking a printing cylinder. The inking system is configured as a long roller inking system and includes two distributing cylinders that are disposed serially in a roller train. A first one of these distributing cylinders is mounted, in the roller train, close to the printing cylinder. The other of these distributing cylinders is mounted, again in the roller train, further away from the printing cylinder. The printing cylinder is rotationally force-driven by an angle position controlled drive motor. One of the two distributing cylinders of the inking system is rotationally force-driven by a drive motor that is mechanically independent of the drive for the printing cylinder. The other one of the two distributing cylinders is rotationally driven by frictional engagement with adjacent rollers or cylinders. It is thus configured without a mechanical drive connection to one of the drive motors other than the frictional engagement with the adjacent roller or cylinders which are intended to rotationally drive it.
摘要:
Printing units are supported between side frames of a web-fed rotary printing press. Each such printing unit includes at least one transfer cylinder and at least one cooperating printing cylinder, which is embodied as a form cylinder. These cylinders are rotatably mounted between the spaced side frames. The printing unit is provided with an inking unit that includes a roller.
摘要:
Printing groups are each comprised of at least two cooperating cylinders, each of which is mounted in a bearing unit that radially displaces its associated cylinder. At least one of these bearing units is provided with an actuator which is controlled, or regulated by a control unit. An inking unit, which encompasses at least one ink application roller, is provided for each printing group. At least one of the cylinders of the printing group, and an ink application roller of the associated inking unit can optionally be placed against each other. A dampening unit, comprising at least one dampening fluid application roller, is also provided. At least one of the cylinders of the printing group and a dampening fluid application roller of the dampening unit are also optionally placed against each other. The at least one actuator for the bearing unit is remotely controlled and is embodied either as a hydraulic actuator or as a pneumatic actuator.
摘要:
Printing units are supported between side frames of a web-fed rotary printing press. Each such printing unit includes at least one transfer cylinder and at least one cooperating printing cylinder, which is embodied as a forme cylinder. These cylinders are rotatably mounted between the spaced side frames. The printing unit is provided with an inking unit that includes a roller.
摘要:
In a method for starting a synchronous machine, a default torque is predefined, and a rotational speed of the synchronous machine is adjusted after starting. A torque which is higher than the default torque is predefined, and the higher torque is reduced in the subsequent second step to a positive value which is less than the default torque, and is increased to the default torque in a third step.
摘要:
A printing unit has at least one press unit having a plate cylinder with at least one printing plate that can be mounted on the plate cylinder and which carries a printing image. The plate cylinder has at least one cylinder channel in which ends of the printing plate can be fixed or positioned. The printing plate has a leading angled end and also has a trailing angled end, as viewed in the direction of rotation of the printing cylinder during operation of the printing press. The printing plate can be secured to the plate cylinder by insertion of the plate leading end into the cylinder channel and by insertion of the plate trailing end into the same, or another cylinder channel. Initially, the plate trailing end is fixed in its associated cylinder channel and the plate cylinder is rotated in a rotational direction counter to a production direction. The leading plate end is then fixed in its associated cylinder channel during continued rotation of the plate cylinder opposite to a production direction. Once the printing plate is secured, the printing cylinder is rotated in its production direction.
摘要:
A printing unit is comprised of at least two cylinders which cooperate with each other in a printing group. At least one of these at least two cylinders is movably mounted so that it can be positioned against the other of the at least two cylinders by the use of at least one actuator, which is preferably configured as a power-controlled actuator. A control device is provided and in which several different preset values, which represent different levels of contact force between the two cylinders, are stored. Such data storage is in accordance with a criterion which concerns machine data and/or consumed material data and/or operational data. This data is usable to position the cylinder by operation of the actuator.
摘要:
At least two blankets which are removed from the same cylinder of a printing machine one after the other, are stored in a storage device. The blankets are drawn off the cylinder in a longitudinal direction and are stored in the device at an angle of inclination of not more than 15° relative to the horizontal. The second blanket to be drawn off is stored below the previously drawn-off blanket at a distance that is vertical along its length.
摘要:
A method is used to set a contact pressure between a displaceable roller and another roller or for moving the displaceable roller with respect to the other roller. At least one actuator is subjectible to the action of a pressure medium and presses the displaceable roller toward the other roller with an adjustable force. The pressure of the pressure medium can be adjusted by a valve. A switchover device is provided for use in connecting the valve to different actuators, as desired.