Printing Machine Web Path Sequencing for Color Flexibility
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Solution Overview
Problem
Existing printing machines are inflexible and require two separate machines or units to handle different color sequences for printing on substrates, either with the image in front or behind the substrate, as they have fixed sequences for applying colors.
Innovation Solution
A printing machine with multiple web paths that allow the substrate to pass through printing units in varying sequences without changing the traveling direction, enabling the same machine to print images with the substrate in front or behind the image by selecting the appropriate web path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed sequence of printing units is used, then the machine structure is simple, but the adaptability to different color sequences is poor
Solution Approach 1:
The patent implements dynamic configurability by allowing the web path to be selectively routed through different sequences of printing units. The system transitions from a static fixed sequence to a dynamic reconfigurable path system, where the web can be directed to pass through printing units in different orders based on the required color sequence, resolving the contradiction between adaptability and structural simplicity.
Solution Approach 2:
The printing machine is designed with multiple web paths that enable a single machine to perform multiple printing sequences (e.g., CMYK-white, white-CMYK, CMYK-OV). This multi-functionality allows the same printing units to serve different purposes by changing the web routing path, eliminating the need for separate machines for different color sequences while maintaining reasonable structural complexity.
2Adaptability or versatility
If two separate printing machines are used for different color sequences, then the adaptability is improved, but the device complexity and space requirement increase
Solution Approach 1:
The patent merges the functionality of multiple printing machines into a single integrated system. By providing multiple web paths within one machine that route through the same printing units in different sequences, the system combines the capabilities of what would otherwise require separate machines, reducing the overall footprint while maintaining full adaptability to different color sequences.
Solution Approach 2:
A single printing machine is designed to universally handle multiple color sequences through reconfigurable web paths. The same physical printing units can be accessed in different orders by routing the web through different paths, making one machine universal for applications that would traditionally require multiple specialized machines, thereby reducing space requirements.
3Adaptability or versatility
If the web traveling direction is changed to achieve different color sequences, then the adaptability is improved, but the complexity of web handling increases
Solution Approach 1:
Instead of dynamically changing the web traveling direction, the system uses dynamic path selection within a fixed traveling direction. The web always moves in the same direction through the machine, but the routing path can be changed to pass through printing units in different sequences, reducing the complexity of web handling while maintaining adaptability.
Solution Approach 2:
The patent resolves the sequencing problem by adding a path dimension rather than changing the direction dimension. Multiple web paths are provided within the same traveling direction, allowing the web to be routed through printing units in different sequences without reversing or changing the fundamental direction of web movement, thereby simplifying web handling complexity.
Data Source
Figure 1~2
AI summary
A printing machine (10) for printing on a substrate having the form of a web (12) is described. It comprises a web entry unit (14) for receiving the web (12) on which a printing process is to be performed and a web exit unit (20) for dispensing the web (12) after the printing process. Furthermore, at least two printing units (26, 28, 30, 32, 34, 36, 38) are provided, wherein each of the printing units (26, 28, 30, 32, 34, 36, 38) is configured for applying an ink of a predetermined color on the web (12). Additionally at least two web paths (A, B) are provided between the web entry unit (14) and the web exit unit (20), each of the web paths (A, B) passing by all of the printing units (26, 28, 30, 32, 34, 36, 38). The web paths (A, B) pass the printing units (26, 28, 30, 32, 34, 36, 38) in a differing sequence. Moreover, a method for changing a color sequence within a printing process is presented. According to this method, the web (12) is arranged along an alternative web path (A, B) passing by the printing units (26, 28, 30, 32, 34, 36, 38) in a differing sequence, whereas a travelling direction of the web remains the same.