Digital Printing Edge Stripe Marking for Quality Monitoring
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Solution Overview
Problem
Digital printing processes often result in poor-quality prints due to interruptions such as ink depletion or power failures, making it difficult to detect and address quality issues, especially in automated manufacturing environments.
Innovation Solution
A method involving a continuous edge stripe marking parallel to the decoration on printing paper, which monitors print quality, allowing for detection of poor-quality prints and adjusting cut marks accordingly, ensuring only high-quality prints are produced.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If digital printing is continued after interruption (ink depletion, maintenance, power failure), then productivity is maintained, but print quality deteriorates
Solution Approach 1:
The system performs preliminary quality assessment by printing and monitoring edge stripe markings before the main decorative image. This early detection mechanism allows the system to identify print quality issues caused by interruptions (ink depletion, maintenance, power failures) before they affect the entire decorative image, enabling preventive action while maintaining productivity.
Solution Approach 2:
Edge stripe markings serve as an intermediary element between the printing process and quality assessment. These markings are printed alongside the main decor and provide a simplified, standardized target for optical monitoring devices to evaluate print quality parameters (color accuracy, dot placement, ink deposition) without requiring complex analysis of the entire decorative image.
2Measurement precision
If optical monitoring devices assess the entire decorative image, then measurement precision is high, but device complexity and processing time increase
Solution Approach 1:
The quality assessment function is segmented into two parts: edge stripe markings for rapid parameter verification and decorative images for final product output. The optical monitoring system focuses on analyzing only the edge stripe markings, which contain sufficient information to evaluate print quality parameters, thereby reducing computational complexity and processing time while maintaining measurement precision.
Solution Approach 2:
The edge stripe markings are designed with specific local characteristics (uniform color blocks, defined geometry, known color values) that make them ideal for quality assessment. Rather than analyzing the entire decorative image with varying complexity, the system concentrates monitoring resources on these standardized local elements where quality parameters can be precisely measured and compared against reference values.
Data Source
AI summary
The invention relates to a method for imprinting printing paper (1) with at least one decor (2) comprising a decor image (3) for use in flat components, particularly floor, wall, ceiling or furniture applications, wherein the printing paper (1) is imprinted by a digital printing device using a digital printing method. In order to provide a printing method for producing prints of high print quality, the invention provides for the printing paper (1) to have a continuous edge strip marking (17) parallel to the decor (2) and with at least one longitudinal colored strip (18) printed thereon and for the print quality to be monitored as a function of the edge strip marking (17).