Method for printing and automatically cutting a textile sheet
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Solution Overview
Problem
Existing methods for printing and automatically cutting textile sheets face challenges in avoiding imperfections under various lighting conditions and minimizing fabric waste, as visible ink markings can become visible and require increased spacing between patterns, while invisible ink markings may become visible under UV light and also result in fabric waste.
Innovation Solution
The use of invisible inks with an emission peak at wavelengths longer than the visible spectrum, allowing markings to be printed both internally and externally without affecting the final product's appearance, and detectable only under specific lighting conditions, enabling precise automatic cutting without fabric waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If visible ink is used for printing markings on the textile sheet, then the markings are visible for cutting guidance, but the markings create aesthetic imperfections on the final product and increase fabric waste
Solution Approach 1:
The patent applies invisible ink that changes its optical properties based on illumination wavelength. The ink appears invisible under visible light (avoiding aesthetic imperfections) but becomes visible under UV or infrared illumination (enabling cutting guidance). This wavelength-dependent visibility resolution directly addresses the contradiction between marking visibility and aesthetic quality.
Solution Approach 2:
The patent changes the illumination parameter (wavelength) to control the visibility of markings. By using different wavelengths for detection (UV/IR) versus normal viewing (visible light), the system achieves both invisible appearance under normal conditions and visible guidance during cutting, resolving the contradiction between aesthetic quality and functional visibility.
2Object-affected harmful factors
If markings are printed outside the patterns to avoid imperfections, then aesthetic quality is maintained, but fabric waste increases due to increased spacing between patterns
Solution Approach 1:
The patent uses invisible ink that can be printed directly on the pattern edges without creating visible aesthetic imperfections. Since the ink is invisible under normal lighting, patterns can be placed closer together without concern for visible markings, thereby reducing fabric waste while maintaining aesthetic quality.
Solution Approach 2:
The patent creates an optical copy or representation of the pattern contours using invisible ink markings that can be detected by specialized cameras. These markings serve as precise guides for cutting without requiring additional spacing, enabling tight pattern nesting and reducing fabric waste while maintaining aesthetic quality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution ensures that markings are not visible under normal lighting conditions, reducing fabric waste and allowing for precise cutting control, while remaining detectable for automated systems, thus minimizing imperfections and fabric loss.
Implementation Method 1
which, on the contrary, emit in the visible by fluorescence when excited with UV radiation
Implementation Method 2
said automatic cutting machine (3) comprising an image acquisition system (20) with at least one camera (21) having at least one sensor sensitive to infrared radiations
Data Source
Figure 1
Figure 2~3
AI summary
Method for printing and automatically cutting a textile sheet (10), the method comprising printing a plurality of patterns (11) on the textile sheet (10), printing markings (23, 23', 24, 24') on the textile sheet (10), the markings representing useful information for the automatic cutting and/or for treatment of the textile sheet and/or of the cut patterns (12), the markings being printed using an ink that is substantially invisible to the human eye and having an emission peak at a wavelength greater than 700nm, detecting the printed markings (23, 23', 24, 24'), obtaining the information from the detected markings and carrying out the automatic cutting and/or the treatment as a function of the obtained information