Inkjet Printing Image Decomposition for Surface Alignment

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Solution Overview

Problem

Existing inkjet printing methods struggle with aligning images to the surface of manufactured articles, often causing misalignment and potential damage, and require sophisticated equipment or large memory for image processing.

Innovation Solution

A method and equipment that decompose the final image into decorative portions, rotate them digitally based on the article's inclination, and apply these portions using independent processing units to align the image accurately without physical interaction, using common computers and less sophisticated components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a mechanical centering device is used to align the manufactured article with the printer, then the alignment accuracy is improved, but the manufactured article may be damaged by the mechanical element rubbing against its edges

Engineering Contradiction:
Improvealignment accuracyVSAvoiddamage to manufactured article
Core Design Contradiction:
Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the mechanical centering device with a digital image processing system. Instead of using physical mechanical elements to align the manufactured article, the system captures an image of the article, detects its orientation and position digitally, and then adjusts the printing path accordingly. This substitution eliminates the harmful mechanical contact that could damage the article while maintaining alignment accuracy through computational methods.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Adaptability or versatility

If movable print heads are used to adapt to the position of the exposed surface, then the alignment flexibility is improved, but the printing speed decreases due to slow movement operations

Engineering Contradiction:
Improvealignment flexibilityVSAvoidprinting speed
Core Design Contradiction:
Adaptability or versatilityVSProductivity

Solution Approach 1:

The patent replaces the movable print head mechanism with a stationary print head combined with digital image processing. Instead of physically moving the print heads to follow the exposed surface position, the system keeps the heads fixed and uses software to calculate and adjust the printing path based on the detected article orientation. This eliminates the slow mechanical movement operations while maintaining alignment flexibility through computational adaptation.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Adaptability or versatility

If multiple versions of the same image are processed to suit different inclinations, then the adaptability to article orientation is improved, but the memory requirements and system complexity increase

Engineering Contradiction:
Improveadaptability to article orientationVSAvoidsystem complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent uses parameter changes in the digital image processing approach. Instead of storing multiple versions of the same image with different orientations, the system captures a single image and dynamically adjusts printing parameters (such as rotation angle, scaling, and positioning) based on the detected article orientation. This allows the system to adapt to any article inclination without requiring large memory capacity or complex multi-version image management.

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentEP4267395B1Computer-implementated method for inkjet printing and related equipment
Publication Date: 2025.09.10 PROJECTA ENGINEERING SRL
  • EP4267395B1 patent drawingFigure 1
  • EP4267395B1 patent drawingFigure 2
  • EP4267395B1 patent drawingFigure 3

AI summary

The method for inkjet printing, comprises at least the following phases of: providing at least one inkjet printing device (4) provided with a plurality of print heads (5) and provided with a plurality of dedicated processing and control units (8), each of which is operatively connected to at least one related print head (5); providing at least one manufactured article to be decorated (M1) having an exposed surface (Ma); movement of the manufactured article to be decorated (M1) with respect to the printing device (4) along a direction of forward movement (3); providing a final image (F) in digital format to be applied on the exposed surface (Ma); decomposition of the final image (F) into a plurality of decorative portions (P); sending each of the decorative portions (P) in digital format to a related dedicated processing and control unit (8); application of each of the decorative portions (P) on the exposed surface (Ma) by means of the print heads (5) operated by the dedicated processing and control units (8) so as to obtain a decorated manufactured article (M2) with the final image (F).