Patent ID: 6741369
Filing Date: 2004-05-25
Classification: B41C

Abstract:
A method for operation of an engraving element in an electronic engraving machine for engraving a printing cylinder for rotogravure, comprising the steps of:before at least one of a start of engraving and during an engraving interruption, heating the engraving element in order to achieve a good engraving quality by substantially reducing heat induced permeability changes and dimension changes affecting the engraving element; forming an engraving signal of a superimposition of an image signal representing gradations to be engraved with a periodic raster signal for generating the raster; then engraving with an engraving stylus of the engraving element controlled by an engraving signal a sequence of cups arranged in a raster into the rotating printing cylinder; and executing with the engraving element a feed motion along the printing cylinder proceeding in an axial direction of the printing cylinder for the engraving the cups.