Other

Helmut Eichler

Franz Knopf

Friedrich W Vorhagen

Hans M Hutten

The color scanning signals generated by scanning the original are first converted into three primary color signals having actual color values in a predetermined color coordinate system corresponding substantially identically to theoretical color values of the original. It is only after this conversion that the primary signals or signals derived from these signals are converted to another color rendition system, or the gradation is altered, or the color rendition of individual colors in the overall image or in discrete areas is altered, or any other non-linear processing takes place.

Method for the reproduction of originals which, with respect to their

A method for electrostatic assistance of the printing process in printing machines, in which method a printing substrate, being of a material which is not electrically conductive, is passed between a printing cylinder coated with printing ink and a contact pressure roller which mechanically presses the substrate against the cylinder and which is provided with a non-conductive or weakly-conductive outer layer, during which procedure the application of a high voltage between the printing cylinder and at least one of the electrode arrangements running in a longitudinal direction to the contact pressure roller results in electrons and ions being sprayed by corona discharge onto the surface of the contact pressure roller, which, as a result of its rotating and/or its intrinsic conductivity conveys these charged particles into the printing gap and enables them to flow off over this gap, and also a corresponding printing machine.

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Durbach, Germany

Helmut Eichler