Patent ID: 6302020
Filing Date: 2001-10-16
Classification: B41C,H04N

Abstract:
A method for engraving at least one rotating printing cylinder for rotogravure with an engraving element in an electronic engraving machine, comprising the steps of:acquiring an engraving signal for driving the engraving element dependent on predetermined engraving parameters;with the engraving element, engraving cups into the at least one rotating printing cylinder arranged in a raster deformed by the predetermined engraving parameters, engraving depths of the cups representing engraved gradations;with the engraving element for engraving of the cups implementing a feed motion along the printing cylinder proceeding axially relative to the printing cylinder, a geometry of the raster being determined at least in part by a circumferential speed of the rotating printing cylinder and by a feed motion of the engraving element;setting at least one of circumferential speed and feed rate of the feed motion dependent on the predetermined engraving parameters;automatically implementing engravings of individual engraving jobs sequencing in chronological succession on engraving areas of the at least one printing cylinder with at least one engraving element in one pass by an automatic executive sequencer programmable according to the individual engraving jobs;dependent on respectively prescribed predetermined engraving parameters of the individual engraving jobs, generating control signals in the executive sequencer, said control signals, according to a position of the individual engraving areas on the printing cylinder automatically changing at least axial position and feed rate of the engraving element as well as the circumferential speed of the printing cylinder for a following subsequent engraving job after an end of an initial engraving job.