Multi-Layer Printing for Barcode Contrast on Corrugated Material
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Solution Overview
Problem
Printing bar codes on corrugated materials poses challenges due to variability in color and reflectance, leading to low symbol contrast and difficulty in scanner readability, which can result in monetary penalties for manufacturers.
Innovation Solution
A printing system with one or more print heads configured to print different colors in a multi-layer or interdigitated pattern onto a target object, achieving a symbol contrast of at least 40% to ensure scanner readability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If single-color printing is used on corrugated material, then printing process is simple, but symbol contrast is low and barcode readability is poor
Solution Approach 1:
The printing process is segmented into multiple layers: a base layer (white or light-colored) printed first, followed by a data layer (dark-colored barcode) printed on top. This segmentation allows each layer to serve a specific function - the base layer provides high reflectance while the data layer provides low reflectance, achieving the required symbol contrast of at least 40% for scanner readability
Solution Approach 2:
The solution transitions from single-color (one-dimensional) printing to multi-color (two-dimensional) printing by adding a vertical layering dimension. The base layer and data layer are printed at different times and positions, creating a multi-layer structure that achieves high symbol contrast while maintaining process simplicity
2Manufacturing precision
If multi-color printing is used to improve symbol contrast, then barcode readability improves, but printing system complexity increases
Solution Approach 1:
The printing system is segmented into separate functional units: a base layer print head for applying the white or light-colored background, and a data layer print head for applying the dark-colored barcode. This segmentation allows each print head to be optimized for its specific function while working together to achieve high symbol contrast
Solution Approach 2:
The base layer is printed in advance before the data layer. This preliminary action ensures that the high-reflectance background is already in place when the dark-colored barcode is applied, guaranteeing the required symbol contrast without requiring complex real-time coordination between multiple print heads
Data Source
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AI summary
A printing system (100) and method print different colors onto a target object (106) to form a machine-readable data representation (112). The printing system (100) and method direct print heads (110) to print the different colors by printing a base layer of a first color on the target object (106) and printing an upper layer of a different, second color on top of the base layer of the first color. The different colors are printed on to the target object (106) such that none of the different colors is printed on top of another color.