摘要:
Variable-format web-fed offset printing machine having printing-unit cylinders comprising core cylinders to which compressed air can be applied and onto which intermediate sleeves can be pushed axially and shrunk on radially. Each intermediate sleeve includes a carrier layer whose inner face rests on the core cylinder, a compressible intermediate layer, a transition layer, and a variable-thickness bridging layer, which ends with a covering layer to which a further surface like a printing plate or a rubber blanket can be fitted.
摘要:
A method of operating a printing machine and a printing machine apparatus in which basic knowledge about the interaction between operating media in the printing machine is obtained through printing trials or during production. This knowledge is stored in an expert system and made available for the printing operation or else for the production of the printing plate. The expert system is preferably a self-teaching system. For color reproduction, basic calibrations are carried out in a first quality step, in a second step, the imaging operation is adapted to the areas and half tones to be imaged, and ink-density regulation is carried out in a third step.
摘要:
A method for adjusting contact between two rollers of a printing mechanism of a rotary printing press, which rollers are adjustable with respect to their distance relative to one another. The method includes separating the two rollers, driving a first one of the rollers at a first speed, moving the rollers toward one another on one end until they reach a point where the first roller drives a second roller, and sensing rotation of the second roller and registering value data representing the point where the first roller drives the second roller. Next, the rollers are separated after the value data has been registered. Following this separation the method continues with moving the rollers toward one another on a second end until the first roller drives the second roller, sensing rotation of the second roller and stopping movement of the rollers at the second end when rotation of the second roller is sensed. Finally, the first end is adjusted to the point where the first roller drives the second roller.
摘要:
A method and device for producing a permanent as well as erasable image on a printing plate, in particular within a printing press, is disclosed. A printing plate with a rewritable and erasable surface is made available. The surface of the printing plate made available is erased and a permanent and erasable image is created on the erased surface. Following the erasing of the surface, the surface is imaged, gummed and fixed, namely in such a way that, on the one hand, the imaging and the gumming and the fixing occur relative to the erasing in a chronologically sequential and spatially sequential manner, and that, on the other hand, the imaging and the gumming and the fixing each occur relative to one another in a chronologically parallel but spatially sequential manner.
摘要:
A printing press and a method for operating the printing press is disclosed. The press has at least one printing unit including at least one printing couple with a transfer cylinder, a form cylinder carrying an imageable and de-imageable printing form, an inking couple and a dampening unit. A memory is assigned inside the printing press to at least one printing unit having several memory locations for form cylinders, where the form cylinders for the printing units can be transferred automatically by at least one transport device between a printing couple of the printing unit and a memory location of the memory, where the form cylinders can be transferred automatically inside the memory between the various memory locations, and where an imaging device is assigned to at least one memory location to image and de-image in advance an imageable and de-imageable printing form positioned on a form cylinder.
摘要:
A printing unit of a web-fed rotary press, with several printing couples, wherein each printing couple has a form cylinder, a transfer cylinder, an inking couple and preferably a dampening unit. At least one printing couple of the printing unit is positioned on each side of the printing unit, wherein on both sides of the printing unit, the inking couple and possibly the dampening unit of the printing couple or of each printing couple arranged on the respective side of the printing unit form an inking module. Each inking module of the printing unit can be moved relative to the other assemblies of the printing unit by an air cushion conveyance device.
摘要:
A printing cylinder for a rotary web press to which at least one printing form is attached and a method for operating a rotary web press is disclosed. The printing cylinder is built up of at least one cylinder core and an adapter sleeve installed thereon, wherein the adapter sleeve is configured in such a way that either printing forms in the shape of sleeves or printing plates can be attached thereto before the printing process, depending on the size of the print run.
摘要:
In order to create preconditions, in a web-fed rotary press, for good format variability of the printed products and economic utilization of the printing material, at least two printed pages of different heights are arranged in the circumferential direction on a form cylinder.
摘要:
A web-fed press is provided. The web-fed press includes a reel carrier and a plurality of printing units arranged one after another for printing a printing material with a static printed image. The web-fed press includes a folder superstructure that is arranged after the printing units and a folding unit arranged after the folder superstructure. An imprinting unit for individualizing the static printed image with, in particular, changing text and/or image constituents is integrated into the web-fed press in the region of the folder superstructure.
摘要:
A method for producing a printing form of a rewritable type erases the surface of the printing form and than images the erased surface to provide a permanent and erasable image on the surface. The erasure and imaging of the surface of the printing form are carried out in such a way that only at least one selected section or region of the surface, rather than the entire surface, of the printing form is erased and re-imaged.