摘要:
A printing machine has at least one printing unit on which a web of material, which is to be imprinted, is imprinted by offset printing in a variable cut length. A folder is mounted downstream, in the direction of travel of the printed web, of the at least one printing unit. The folder may be located directly or indirectly from the at least one printing unit and has a variable cut length.
摘要:
A rotary roller printing press has a printing unit for printing a web in six printed pages arranged axially next to each other. A superstructure is used to cut the web longitudinally into three partial webs. A folding installation is used to fold the partial webs and includes at least one roller for transporting the partial webs, and at least one folding apparatus. The printing unit, the at least one roller for transporting the partial webs of the folding installation, and the folding apparatus, which is arranged after in the direction of web travel, the other devices, are each separately mechanically driven by a separate drive motor.
摘要:
A rotary roller printing press has a printing unit for printing a web in six printed pages arranged axially next to each other. A superstructure is used to cut the web longitudinally into three partial webs. A folding installation is used to fold the partial webs and includes at least one roller for transporting the partial webs, and at least one folding apparatus. The printing unit, the at least one roller for transporting the partial webs of the folding installation, and the folding apparatus, which is arranged after in the direction of web travel, the other devices, are each separately mechanically driven by a separate drive motor.
摘要:
A turning bar is used to turn a web of material. The turning bar includes an outer jacket that is provided with holes on at least one section of its circumference. An inner chamber of the turning bar is provided with compressed air. A piston is arranged in the inner chamber and is movable to block selected ones of the holes. A motor is used to move the piston via a control signal provided by a control circuit. The turning bar can be pivoted by 90° on a frame around a pivot axis that is perpendicular to a longitudinal axis of the turning bar. A transmission couples a rotational movement of the piston around the longitudinal axis to a pivoting motion of the turning bar.
摘要:
A guiding roller, that is used to turn a web of material, has a jacket surface provided with holes over at least a portion of its periphery. An inner surface of the guiding roller is provided with compressed air. A piston is axially displaceable in the roller inner surface and can occlude selected ones of the holes. A motor is provided for displacing the piston in response to a control signal supplied by a control circuit. The guiding roller is pivotally supported by a frame and can pivot through 90° about a pivot axis which is perpendicular to the longitudinal axis of the roller. A gear mechanism couples a rotational movement of the piston about the axis to the pivotal movement of the guiding roller.
摘要:
A device for feeding a web of material utilizes a pair of low angle bar superstructures situated adjacent to each other. Two cross or transverse folding devices are situated on the same or on different planes after, in the direction of web travel, the superstructures. Wide webs of material can be processed and if one of the transverse folders fails, production can be shifted to the other folder.
摘要:
A turning bar arrangement for redirecting the path of travel of a material web utilizes at least one turning bar and at least one register roller. The web of material is caused to be enwrapped about both and extends between both to define a plane. When viewed in a direction perpendicular to this plane, the turning bar and the register roller do not overlap.
摘要:
A pair of partial paper web receiving superstructure units are placed above a transverse folding unit in a folding apparatus. Either a drawing unit or a longitudinal folder and its associated folder hopper inlet can be placed between the superstructure units and the transverse folder. Use of the two superstructure units allows the folding apparatus to have a low structural height.
摘要:
A drawing roller drive for the conveyance of a web in a rotary printing press utilizes a differential gear to accomplish a very exact change in the speed of the drawing roller. A single drive shaft and a single power take-off shaft are aligned coaxially with respect to each other. The differential gear arrangement includes a ball race gear and a downstream tension shaft gear.
摘要:
A printing unit for a rotary printing press, and that is capable of accomplishing a flying printing change, uses a single counter-pressure cylinder and two printing cylinders and ink application rollers. The counter-pressure cylinder and the ink application rollers are shiftably supported with respect to the printing cylinders. They also carry eccentric support disks that engage concentric support disks or the printing cylinders. These disks are usable to adjust the contact force between the cylinders to compensate for printing plate wear.