摘要:
A printing press includes at least one printing unit having a cylinder and a cover covering the cylinder. Actuators are associated with the cylinder for changing a geometry of the cover in axial and/or circumferential direction of the cylinder. Positioning electronics are connected to the actuators and a printing press machine control system is connected to the positioning electronics. An image inspection device is connected to the printing press machine control system at least for geometric measurement of printed printing materials. A printing press computer processes measured results from the image inspection device for carrying out a desired/actual value comparison and for driving the actuators to minimize determined deviations, in the event that deviations are determined.
摘要:
Device for guiding a print carrier while the print carrier is respectively fed to and removed from a plate cylinder of a printing press includes a pair of guide elements arranged in parallel with the axis of the plate cylinder, and a setting mechanism for positioning the guide elements, the guide elements being formed, respectively, of at least one segment, one of the guide elements, during feeding of a print carrier to the plate cylinder, and another of the guide elements, during removal of the print carrier, being in engagement with the respective print carrier.
摘要:
Device for fastening a flexible printing plate on a plate cylinder of a rotary printing press includes a tensioning bar disposed axially parallel with the plate cylinder in a cylinder gap formed in the plate cylinder, a clamping bar swivellably fastened to the tensioning bar, a cam shaft supported in respective end walls of the plate cylinder, a first and a second cam pair carried by the cam shaft, first and second spring assemblies, respectively, cooperating with the first and the second cam pairs, the cam shaft being rotatable in one direction for actuating the first cam pair to shift the tensioning bar via cam rollers and against a force of the first spring assemblies into a printing-plate take-up position, and for actuating the second cam pair to open the clamping bar via pins attached thereto against a force of the second spring assemblies so that a trailing end of the printing plate is insertable into the open clamping bar, the cam shaft being rotatable in a direction opposite to the one direction for initially actuating the second spring assemblies to close the clamping bar and for then actuating the first spring assemblies to shift the tensioning bar into a printing-plate tensioning position.
摘要:
Dampening unit for an offset printing machine includes a metering roller, a dampening form roller for applying dampening medium to a plate cylinder of the printing machine, the metering roller and the form roller being in mutually pressing engagement at a contact zone along respective axially parallel lines on respective casings of the rollers, a drive for rotating the metering roller and the form rolelr with circumferential speeds which are substantially in a downward direction in vicinity of the contact zone, a storage space for dampening medium located above the contact zone and defined by surfaces of the casings of the metering roller and the form roller and sealing elements located at respective ends of the metering roller and the form roller, and a traversing distributor roller disposed in direct friction contact with the metering roller.
摘要:
A device for clamping and tensioning an edge of a printing plate on a plate cylinder of a printing press includes a single actuating shaft for releasing clamping and tensioning forces. The actuating shaft has a control cam for releasing the tensioning forces and a control roller for releasing the clamping forces. A printing unit having the device and a printing press having the printing unit are also provided.
摘要:
A device for clamping and tensioning an edge of a printing plate on a plate cylinder of a printing press includes a single actuating shaft for releasing clamping and tensioning forces. The actuating shaft has a control cam for releasing the tensioning forces and a control roller for releasing the clamping forces. A printing unit having the device and a printing press having the printing unit are also provided.
摘要:
Device for holding perforating tools opposite a sheet-carrying cylinder of a rotary printing press includes a bearing and indexing shaft, a carrier body axially displaceably supported by the shaft, the carrier body being formed with a bore extending therethrough axially parallel to the shaft, the carrier body being provided with a clamping device for clamping the carrier body relative to the shaft and with an actuating device for, respectively, effecting a mutual clamping of the shaft and the carrier body and for releasing a mutual clamping of the shaft and the carrier body, the actuating device including rotatably supported rings carried by the carrier body around the shaft, the rings including an eccentric ring provided with a perforating tool.
摘要:
A device for pivoting flexible printing plates on the plate cylinder of a rotary printing machine comprises clamping rails for mounting and clamping the two plate ends, articulated levers pivot-mounted on the cylinder body and articulatingly connected to the clamping rails so that both clamping rails are adjustable relative to each other such that the printing plate may be cocked on the plate cylinder.
摘要:
A plate cylinder of a rotary printing press with a device for adjusting a flexible printing form by a swivelling motion, includes a sleeve adjustable by the adjusting device, the sleeve having an outer cylindrical surface thereon a flexible printing form is mountable.
摘要:
Provided in a printing press having a printing-press housing and an impression cylinder are a numbering box having a numbering-box shaft for holding numbering devices, an inking device with an ink form roller, and a switching or control device, including telescopic rails mounted in the printing-press housing, the numbering box being disposed on the telescopic rails and being displaceable thereon into and out of engagement with the impression cylinder, and a mechanism for simultaneously effecting mutual engagement and disengagement of the inking device and the numbering-box shaft.