摘要:
A roller rotary offset printing press has at least one coating unit and at least one printing unit. The coating unit comprises at least one coating unit and at least one printing unit. The coating unit comprises at least one chamber blade having a water-based coating and at least one anilox roller. The coating unit is arranged along a transport path of a print stock downstream of the at least one printing unit of the roller rotary offset printing press. At least one pair of two rollers is arranged that together form a coating gap. At least one roller of the at least one pair is in contact with the at least one anilox roller. The conveyed volume, at least on one part of the shell surface of the at least one anilox roller, is filled by an amount of coating, the mass of which, based on this part of the shell surface of the at least one anilox roller, minus a water portion, equals, on average, a maximum of 4 g/m2. A blanket having several layers can be placed or is placed on at least one roller of the coating unit.
摘要:
A printing unit of a rotary printing press includes a forme cylinder. An inking unit interacts with the forme cylinder and has a plurality of inking rolls. A dampening unit also interacts with the forme cylinder and has a plurality of dampening rolls. A washing device interacts with at least one of the inking rolls and dampening rolls for washing the inking unit and/or the dampening unit. The inking unit includes a plurality of ink applicator rolls which can be placed directly onto the forme cylinder during printing operation. The dampening unit has at least one dampening rotation applicator roll that can also be placed directly onto the forme cylinder during printing operations. In a washing position, one of the plurality of ink application rolls and the dampening rotation applicator roll are brought directly into contact with each other.
摘要:
A pressure adjustment device of a chambered doctor blade system of a printing press includes at least one chambered doctor blade, at least one ink chamber having at least one supply line connected to an ink reservoir and having at least one drain line or overflow opening that at least partially forms a return flow path of the medium from the at least one ink chamber to the at least one ink reservoir. At least one pressure release valve is arranged in the one of the drain line or overflow opening. Another pressure release valve is also arranged in the at least one supply line. One of the pressure release valves is configured as a passive pressure release valve. The at least one pressure release valve arranged in the at least one supply line has a line connection to at least one bypass line. That bypass line is arranged to at least partially form a return flow path of the medium from the supply line to the ink reservoir.
摘要:
An inking system is comprised of rollers. At least one roller has a barrel with at least two separate sections. One of these casing sections is arranged in a manner which permits it to be changed independently of the other casing section.
摘要:
A printing unit of a rotary printing press includes a forme cylinder. An inking unit interacts with the forme cylinder and has a plurality of inking rolls. A dampening unit also interacts with the forme cylinder and has a plurality of dampening rolls. A washing device interacts with at least one of the inking rolls and dampening rolls for washing the inking unit and/or the dampening unit. The inking unit includes a plurality of ink applicator rolls which can be placed directly onto the forme cylinder during printing operation. The dampening unit has at least one dampening rotation applicator roll that can also be placed directly onto the forme cylinder during printing operations. In a washing position, one of the plurality of ink application rolls and the dampening rotation applicator roll are brought directly into contact with each other.
摘要:
A printing blanket or dressing includes a dimensionally stable carrier plate which has ends that can be secured to a transfer cylinder. A coating is applied to the carrier plate and forms the lateral surface of the transfer cylinder. A recess is located in the printing blanket or dressing intermediate the ends of the blanket or dressing.
摘要:
An adjustment of a transfer of printing ink is accomplished by arranging a first roller in an inker unit and by using that first roller to transfer ink to a forme cylinder. A temperature is adjusted on an outer surface of the first roller by the use of a first temperature control unit which includes an adjuster device. The adjuster device also adjusts a temperature to be set on an outer surface of the forme cylinder by the use of a second temperature control unit. These two temperature control units adjust parameters of the printing ink through the controls of the outer surfaces of their associated first roller and forme cylinders. The parameters of the printing ink which are adjusted are preferably the ink's tackiness and its viscosity.
摘要:
The contact pressure between an adjustably mounted first cylinder and a second cylinder in a printing machine, and particularly in a web-fed printing machine can be adjusted. An actuator is usable to force the first cylinder toward the second cylinder with an adjustable force. A fixing device is usable to fix the first cylinder in a desired position relative to the second cylinder.
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.