A method for manufacturing an embossing tool with a code-containing topography

EP4732074A1Pending Publication Date: 2026-04-29BOEGLI GRAVURES SA
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Patent Information

Application Number
EP2024737822
Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-06-26
Filing Date
2024-06-06
Publication Date
2026-04-29

AI Technical Summary

Technical Problem

Existing methods for combining alphanumeric or image codes with images for embossing lack an effective alternative that can adapt the code into the image for embossing, particularly in achieving secure and readable code-containing topographies on surfaces.

Method used

A method involving the transformation of image files into primary and code rasters, followed by logical operations and translations, to project and engrave surface structures onto an embossing tool, creating a code-containing topography that represents a combination of image and alphanumeric or graphical information.

Benefits of technology

The method enables the creation of embossing tools with code-containing topographies that are readable and decodable, influencing visual, haptic, and mechanical properties of materials, while ensuring security through view-angle dependent optical effects.

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Abstract

A method for manufacturing an embossing tool with a code-containing topography that comprises a plurality of surface structures on the embossing tool surface, comprising providing an image file of the image containing a raster of image pixels with a determined bit depth and an initial image resolution, transforming the image file into a primary raster of image pixels with the determined resolution, providing a code raster of image pixels for the alphanumerical or graphical code, applying a first logical operation to combine the code raster of image pixels and the primary raster of image pixels in order to obtain a first image raster of image pixels as a result. The method further comprises applying a second logical operation to combine the first image raster of image pixels and the code raster of image pixels in order to obtain a second image raster of image pixels). The code raster of image pixels, the first image raster of image pixels and the second image raster of image pixels respectively comprise pixels of bit depth 1, wherein for each raster, a "1"-state of the pixel indicates that a raster-specific surface structure for that raster is to be planned in the topography for a location on the embossing tool surface corresponding to a position (m,n) of the image pixel in the raster, whereas a "0"-state of the pixel indicates that no raster-specific surface structure for that raster is to be planned in the topography for a further location on the embossing tool surface corresponding to a further position of the image pixel in the raster. The method further comprises projecting the code raster of image pixels, the first image raster of image pixels and the second image raster of image pixels onto the embossing tool surface to obtain the topography raster of the locations on the embossing tool surface for the raster specific surface structures, and engraving on the embossing tool surface the raster specific surface structures at their respective obtained locations and hence obtain the code containing topography.
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