DE102007029099A1 - Rotogravure form imaging method for publication printing, involves providing cups of different dimensions to image rotogravure form, and assembling image data provided for imaging of form from image tiles - Google Patents

Abstract

The method involves providing rhomboid shape central cups (1, 2a, 2b) of different dimensions to image a rotogravure form to achieve different tone values or print densities by engraving. Image data for imaging the rotogravure form is assembled from image tiles (3, 4) e.g. polygonal image tiles, by a controller, where some of the image tiles contain a partial cup formed by a portion of adjacent central cups. The partial cup is connected with the central cups by an ink channel (8) in an ink-conducting manner. An independent claim is also included for a system for imaging of a rotogravure form.

Description

The The invention relates to a method and a device for imaging of intaglio printing forms, formed in the or with the wells, preferably engraved, become.

Of Furthermore, the invention relates to an imaged gravure printing form.

Of the Invention is based on the object, the imaging of a gravure printing to improve. In this case, preferably a Bebilderungsdatenverarbeitung be facilitated and / or automated and / or the gravure form be improved in their expression and / or improved sharpness of the printed image can be achieved.

These Task is according to the invention in process view in a first inventive solution thereby solved, that provided for imaging the gravure form image data from Picture tiles are assembled, preferably parquet.

The printed image can be printed easier, faster and more automated be constructed and analyzed if necessary.

Preferably is a respective according to the invention Picture tile constructed or selected that she is a cup and / or parts of neighbors' cups contains. With such picture tiles, the printed image can be complete and advantageous gapless collected and processed by appropriate tiling become.

Indeed give cups in a gravure form, from a certain minimum volume or smaller, the color picked up by them is not reliable and / or Completely to the substrate again. This depends on the one hand, for example from the well volume, on the other hand, for example, on the consistency of the color, in particular their viscosity, from. This can lead to a faulty expression, the in tonal gradients showy and undesirable is, but also in the edge contours of a picture, because such a contour then, for example, could appear frayed. This is especially true equally in publication printing as in packaging printing.

In order to also partial suppositories, for example, to help improve a contour, appropriate are printed, according to another solution of the invention, for the well independent protection is claimed, provided that at least one only partially trained cup with at least one neighboring well, which itself also a Teilnäpfchen could be, is color-connected. Form in this way according to the invention the cup and the submucosal or two or more partial suppositories together a bigger, if necessary bizarre trained cup or Näpfchensytem, that can deliver the paint properly.

Preferably are inventively also by Conditions of image data cut off by a picture edge Randnäpfchen as a part formed in the gravure form. Again, this can lead to the partially formed well a truncated by circumstances of image data by a picture edge Randnäpfchen is, which is introduced only as a partially trained wells in the printing plate and has difficulty in color output. Also to is preferred according to the invention provided that produced a color-conductive connection with a complete well becomes.

A preferred embodiment the method according to the invention provides that at one by circumstances of image data at one Edge of the image edge tile the marginal parts of neighbors cups as Teilnäpfchen be formed. In particular, according to the invention for avoidance isolated partial cells if necessary all marginal parts of neighbors' cups, so the Teilnäpfchen, which lie in the vicinity of an edge, with one from the picture border tile Completely detected wells and / or with another sub-well or with several wells or partial suppositories get connected.

Prefers are inventively easy in Substantially rectangular picture tiles used. Every picture tile could then, for example, essentially the area of a grid a cell picture grid to capture. Other polygonal image tile forms would of course be conceivable, for example, honeycomb shapes or diamond shapes, or even cornerless, for example, tongue-shaped Image tiles.

each Image tile captures or preferably comprises a central well and depending on the screen angle, essentially in diagonal directions the picture tile or in the direction of the respective screen angle finding parts of neighbors' cups.

Preferably, it could be provided according to the invention that connection options between wells and / or partial cells are provided in different directions. If desired, wells and / or partial wells are connected in pairs, but more wells or partial cells could also be connected to one another. In particular, the provided connection options also make it possible to provide selection criteria for the respective preferred connection and / or depending on the situation, for example in the form of a selection algorithm.

If a partial suppository or a picture tile adjacent to a picture edge, according to the invention, preferably automatically, data processing technology recognized by preferred to image the intaglio provided image data by suppositories and / or pixel-wise environment comparison on the edge of a picture edge located wells or parts thereof and / or picture border tiles and searches them thereby be identified. Could do this the entire environment of a cup, of a subcup and / or a pixel of a cup or partial suppository to be viewed as. It can also main search directions are given. Such a procedure can also be self-learning by, for example, previous search sequences become intelligent considered could become.

For a gravure form according to the invention characterized in that they are according to the inventive method is pictured, as well as for a inventive device for imaging a gravure form, which cups in a gravure form which distinguishes itself by being one after the inventive method able-bodied and / or for such a control mechanism, preferably programming or programmability, respectively, is also independent protection claimed. In particular, could the inventive method also be wholly or partially incorporated in a software, with the respective print job conditions can be specified.

One Inventive edge section a picture detail, to which the inventive method again for Part explained is shown in the only drawing figure. From this drawing can also show other inventive features, but should the Invention should not be limited in scope to this embodiment.

The figure shows only schematically and by way of example a possible section of a raster image of wells. The cups are called diamonds 1 . 2a . 2 B indicated. Each with a central cup 1 in the middle are rectangular picture tiles 3 . 4 been formed, whose boundaries with dashed lines 5 are indicated and with which the raster image is captured in a parquet.

In addition, there is a corner of a picture border with solid lines 6 . 7 indicated in the drawing.

Through the course of the picture border 6 . 7 are cups 2 B severed, part of which would be outside the picture border. From such wells 2 B Therefore, in a printing form only that part is respectively formed, preferably engraved, which lies within the image in order to draw as sharply as possible the image contour corresponding to the image edge course.

As already mentioned, every picture tile includes a central cup 1 and in each case in the corner areas of the picture tile a quarter of a Nachbaräpfchens.

The picture tiles 3 are picture border tiles that are at the edge of the picture 6 . 7 adjoining and therefore also sub-cells of Randnäpfchen 2 B include. They also include cups 2a leading to several picture tiles 3 . 4 belong. image tiles 4 are inner picture tiles, which in their corner areas only inner, to several picture tiles belonging Teilnäpfchen of wells 2a exhibit. These inner cups 2a become in the interaction of the picture tiles 3 . 4 completely formed on the printing plate.

The Randnäpfchen 2 B but are only, as I said, partially trained, as far as they are within the picture 6 . 7 lie. This creates small bowl areas that have difficulty dispensing paint to a substrate.

According to the invention, therefore, image data are checked to see which image tiles are image border tiles 3 are and therefore Randnäpfchen 2 B exhibit. Such Randnäpfchen 2 B then become color-guiding through additional color channels 8th or Nähenchendurchstiche connected to the respective central wells of the edge of the picture tile so as to produce a Gesamtnäpfchen that can deliver the color of the Randnäpfchen properly. These color channels are thus generated in the printing form in the imaging with, preferably engraved with. If necessary, a respective color channel is sufficient 8th for connecting a Teilnäpfchens 2 B with a central well 1 out.

Claims (14)

Method for imaging gravure printing forms, in which wells, preferably of different extent, in particular different volumes, are formed, preferably engraved, to obtain different tonal values or print densities, characterized in that image data provided for imaging the intaglio printing form are composed of image tiles, preferably parquetted , Method according to claim 1, characterized in that a respective image tile contains a well and / or parts of neighboring wells. Method for imaging gravure forms, at the cup be formed, preferably according to claim 1 or 2, characterized characterized in that at least one partially trained wells connected in color with at least one adjacent well becomes. Method for imaging gravure forms, at the cup be formed, preferably according to one of the preceding claims, characterized characterized in that also by circumstances of image data by an image edge trimmed Randnäpfchen as Teilnäpfchen in the gravure mold are formed. Method according to claims 3 and 4, characterized that the partially formed well a by circumstances of image data by a picture edge truncated Randnäpfchen is. Method according to one of the preceding claims, characterized characterized in that by a given conditions of image data at an edge of the image located edge of the tile edge parts of Neighborhood as Teilnäpfchen be formed. Method according to Claim 6, characterized that all marginal parts of neighbor cups with that of the picture border tile completely recorded wells get connected. Method according to one of the preceding claims Claims, characterized in that substantially polygons, preferably rectangular picture tiles are used. Method according to one of the preceding claims Claims, characterized in that each image tile substantially the Detected area of a grid mesh of a well grid. Method according to claims 8 and 9, characterized each image tile captures a central well and, depending on Screen angle, essentially approximately in diagonal directions of the picture tile too finding parts of neighbors' cups includes. Method according to one of the preceding claims, characterized characterized in that in different directions connectivity options between wells and / or partial suppositories be provided. Method for imaging gravure forms, at the cup be formed, preferably according to one of the preceding claims, characterized characterized in that provided for imaging the gravure form Image data by dropping and / or pixel-wise environment comparison on the edge of a picture edge located wells or parts thereof and / or picture border tiles and searches them thereby be identified. Gravure printing form, which wells, preferably engraved cups, characterized in that they according to the method one or more of the preceding claims is illustrated. Apparatus for imaging a gravure printing form, which cups formed in a gravure form, preferably engraved, characterized characterized in that they are one after the process according to one or more of the preceding claims able-bodied and / or for such a control mechanism, preferably programming or programmability.