Translation of "Druckformherstellung" in English

The ink application process is controlled using digital data derived from data for production of the print form.

The FM raster dot is smaller, with variations in the printing plate production more clearly visible.

In addition, the management of measurement and control elements necessitates not inconsiderable expense for the printing block preparation.

Within control desk 4, a device 14 for the preparation of printing forms and an image recording system 15 are installed.

It is also easy to resolve any errors that occur while producing the formes.

Fewer process steps are thus required for blockmaking, which improves productivity and reliability in production.

This cuts down on investment costs, saves time and money, and means that filmless blockmaking is very easy.

The quick and simple printing plate manufacture and short setup times of the Alprinta V provide for a high degree of job flexibility.

In electronic printing form production using engraving devices and scanners, the masters to be produced are scanned point-by-point and line-by-line with opto-electronic scanning means and the image signal thus obtained is corrected according to the requirements of the reproduction process.

Thus, it is necessary to regain the reduced contrast or, respectively, the reduced image sharpness in the printing form production or of even increasing it relative to the original for editorial reasons.

This invention relates in general to electronic production of printing forms and in particular to the reproduction by engraving devices and scanners and particularly relates to a method and apparatus for intensifying contrast during the reproduction of masters.

If one now, shortly before the preparation of the printing block, retrieves, via the document plan, the actual mean values of the half-tone dot sizes for the individual inking systems, then the deviations between the set values and the actual values of the halftone dot size can still be taken into account in the printing block preparation.

This is again copied and provides a color separation which now bears the combination of rastered half-tone images and unrastered line drawings and is utilized for the production of forms.

In electronic printing form production utilizing engraving devices and scanners, a master to be reproduced is scanned point-wise and line-wise with an opto-electronic scanning element and the image signal thereby obtained is corrected in accordance with the requirements of the reproduction process.

For certain coating uses, e.g., the production of printing forms for offset printing, it can also be advantageous to use transparent inking agents.

SUMMARY OF THE INVENTION The object of the invention is therefore to further develop a generic process, as well as a device for carrying out this process, which permits a printing form to be produced, especially on a seamless printing form cylinder with a smooth surface, in a simple manner that can be integrated into the printing machine, without the gases created during laser imaging detectably disrupting the transfer of material from the thermotransfer foil, i.e., the image quality.

The method according to claim 1, which comprises maintaining the modification of the raster tonal values when predefining the raster tonal values during production of the printing plate.

The present invention proceeds from an electron beam generating system that has been specifically designed for material processing and for the production of printing forms.

In printing form production with electron beams, the imaging scale of the electron source on the source of the printing form is modulated gradation-dependent for engraving different cup geometries.

We benefit from the many years of experience offered by our partners in print form manufacturing, as well as from our close partnerships with major printers.

To ensure perfect results on paper, there must be perfect collaboration in the printworks: image processing, preliminary work, printing plate production, exposure, printing and controlling – all work procedures and processes that are perfectly co-ordinated at LONGO's printworks in Bozen/Bolzano and Augsburg .

To meet these requirements, this model company in Italy recently completely revamped its blockmaking operations for rotary screen printing formes.

Key topics of the seminar are data handling and printing plate manufacture in offset printing, ink systems, suitable materials (such as PE or PLA) and the range of uses of stepless, variable size web offset technology.