Man Roland Druckmaschinen Ag

Gregor Enke

Armin Weichmann

Karlheinz Huber

A method for monitoring and analysing the printing process of a press includes both measured data which reproduce or influence the quality of the printed product and measured data which reproduce the state and consumption of the press or its parts are acquired. To monitor and analyse the printing process, the acquired measured data are placed in a relationship with one another, so that the printing process can be monitored effectively via new data produced as a result.

Method for monitoring and analysing the printing process of a press

A method for calibrating a digitally controllable printing machine having a permanent printing plate, for which image data has been created in machine-independent format in a pre-press stage. The image data is prepared for the printing process by a data processing device and is fed in adapted form to the printing machine . The data processing device uses a profile which corresponds precisely with the current machine condition, for the final data preparation for printing. The profile can be addressed using the correct color-space conversion for the printing machine (i.e., calibrated). For this purpose, at the time at which the data is prepared for image setting, a machine condition forecast for the time of printing is called up and, from this, together with the knowledge of the operating materials, the machine profile which most closely approaches that for the print job is determined. This profile is then used for the data preparation.

Method for profiling and calibrating a digitally controllable printing machine having a permanent printing plate

A process corrects geometric errors in the transfer of information without mechanical intervention on the printing form, to compensate for the errors that occur and thus attain optimized print quality prior to imaging. The corrections are visually indiscernible, so that the artifacts created in the printed result by the corrections do not stand out in the image. A device-independent description of the page information to be printed is converted by a Raster Imaging Process into at least one device-dependent digital matrix. Each matrix with m rows and n columns contains the information for a certain color to be printed. After the individual matrices are produced, they are supplied to a matrix manipulation device, which subjects each matrix to a correction transformation using specific parameters. After the matrices are adjusted, they are supplied by a matrix transfer device to the digital imaging devices in the printing mechanisms.

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Augsburg, Germany

Gregor Enke