Ink Flushing for Packaging Pouch Design Quality
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Solution Overview
Problem
In the packaging industry, printing apparatuses face challenges in maintaining design quality for packaging pouches since traditional line flushing methods can create visible linear eject patterns on the packaging pouches, which are unsuitable for continuous printing areas without discard regions, especially during the bag making process.
Innovation Solution
A printing method and apparatus that convey packaging base materials in an elongated strip and perform flushing processes by ejecting ink towards invisible regions on the printing surface, determined by position information, to prevent design quality impairment post-bag making process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If line flushing is performed to prevent ink viscosity increase, then nozzle reliability is improved, but design quality deteriorates due to visible linear eject patterns on the packaging pouch
Solution Approach 1:
The patent applies local quality by differentiating the treatment of different regions on the packaging base material. Instead of uniform flushing, the system identifies invisible regions (where the pouch will be sealed or folded) and applies flushing only to those specific locations, while leaving visible regions unflushed to maintain design quality.
Solution Approach 2:
The patent employs preliminary action by determining the invisible regions before the flushing process occurs. The system analyzes the packaging design to pre-identify areas that will be sealed or folded, and plans the flushing operation to target only those predetermined regions, avoiding any impact on visible design areas.
2Productivity
If continuous printing is performed without discard areas, then productivity is improved, but ink viscosity increases causing nozzle clogging
Solution Approach 1:
The system applies local quality by concentrating flushing operations in specific invisible regions rather than performing uniform flushing across the entire printing surface. This allows continuous printing to proceed without interruption while still providing necessary flushing to prevent ink viscosity increase in the nozzle.
Solution Approach 2:
The patent implements self-service by using the packaging base material itself as the flushing medium. The invisible regions of the base material serve the dual purpose of both packaging function and flushing target, eliminating the need for separate discard areas or additional flushing materials.
3Reliability
If flushing is performed on visible regions to maintain nozzle performance, then reliability is improved, but appearance quality deteriorates due to visible linear patterns
Solution Approach 1:
The patent applies local quality by selectively applying flushing only to invisible regions of the packaging base material. The system determines which regions will be sealed or folded during bag making, and restricts flushing to those areas, thereby maintaining nozzle performance without creating visible patterns on the packaging pouch.
Solution Approach 2:
The patent extracts the flushing function from the visible printing areas and relocates it to invisible regions. By separating the flushing operation from the visible design areas, the system preserves both nozzle performance and appearance quality, as the flushing occurs in areas that will not be visible to consumers.
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 approach allows for satisfactory printing on packaging pouches without compromising design quality, reducing ink consumption, and optimizing the flushing process based on the bag size, thereby enhancing the manufacturing efficiency and cost-effectiveness.
Implementation Method 1
printing by ejecting ink to a printing surface of a packaging base material from a nozzle
Implementation Method 2
performing a flushing process by ejecting the ink toward the invisible region from the nozzle
Data Source
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AI summary
In a printing method, is obtained position information of an invisible region invisible from outside, out of the printing surface of the packaging base material. Then a flushing process in which ink is ejected the ink toward the invisible region from the nozzle based on the position information is performed. Therefore, printing for packaging pouch (300) can be satisfactorily performed on the packaging base material without impairing the design quality of the packaging pouch manufactured by applying the bag making process to the packaging base material.