Kba-giori S.a.

Kba-notasys Sa

De La Rue Giori S.a.

Laurent Mathys

Jacques Perrier

Fausto Giori

Dirk Dauw

Lan Guex

There is described a method of checking producibility of a composite security design of a security document, in particular of a composite banknote design, on a line of production equipment, the composite security design being the product of a combination of multiple sets of design features that are to be provided on a substrate as a result of a plurality of successive production operations carried out by means of the line of production equipment. The method comprises the steps of (a) providing digital design data representative of the composite security design of the security document, (b) modelizing, in a computer environment, the line of production equipment by means of which the composite security design is intended to be produced, (c) performing a computer simulation of production results of the plurality of successive production operations on the basis of the digital design data and the modelized line of production equipment, and (d) evaluating the computer simulated production results and determining, on the basis of these computer simulated production results, whether the composite security design can be produced on the line of production equipment.

Method of checking producibility of a composite security design of a security document on a line of production equipment and digital computer environment for implementing the same

The control element has a first drawing printed on a first side of the article, comprising at least a first set of geometrical shapes. It includes a second drawing printed on a second side of said article, the second drawing being printed so as to face the first drawing and be in register with the latter, said second drawing comprising at least a second set of geometrical shapes corresponding to the first screen. At least one of said geometrical sets includes sectors which are offset so that, when the front side/reverse side register is correct, the control element has regions of variable density which are visible in transmitted light and are created by said offset sectors.

Control element for printed articles

A method of manufacturing an engraved plate used in intaglio printing, said plate being engraved by a tool, for example a laser beam, characterized in that the engraving tool uses data from a depth-map, based on a three-dimensional raster image of the document to be printed.

Method of manufacturing an engraved plate

Control element for printed matters

A net of parallel lines is generated with the aid of a computer. The ratio of the width to the spacing of two consecutive lines is equal to r.sub.o. The spacing and width of the lines are successively modulated such that their ratio is equal to r.sub.o. Subsequently, the straight lines can if so chosen be transformed into differently shaped lines or the width of the strokes can be altered in order to reproduce geometrical or artistic images.

Growing community of inventors

Plan-les-Ouates, Switzerland

Laurent Mathys