Inkjet Printer Adhesive Layer Control for Foil Transfer Clarity
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Solution Overview
Problem
Existing inkjet printing technologies face challenges in forming precise adhesive layers for transferring foil, as conventional inks often result in unevenness and spreading issues, especially when forming thin-line images, leading to transfer unevenness and loss of image clarity.
Innovation Solution
An inkjet printer system utilizing two types of inks with different wet spreadabilities, where a first ink with higher spreadability forms image areas wider than a threshold and a second ink with lower spreadability forms areas narrower than the threshold, controlled by processing circuitry to prevent excessive spreading and ensure clear, stable foil transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a conventional ink with high wet spreadability is used to form the adhesive layer, then the ink can cover larger areas, but the ink spreads excessively on thin-line images causing transfer unevenness and loss of image clarity
Solution Approach 1:
The patent applies local quality by using different inks with different wet spreadabilities for different image area widths. For narrow image areas (thin-line images), an ink with low wet spreadability is used to prevent excessive spreading and maintain image clarity. For wide image areas, an ink with high wet spreadability is used to ensure adequate coverage. This allows each region to have the optimal ink properties for its specific requirements.
Solution Approach 2:
The patent changes the parameter of wet spreadability by selecting different inks based on the image area width. The control unit determines the width of the image area and selects the appropriate ink accordingly. This parameter change enables the system to adapt to different printing requirements and resolve the contradiction between coverage area and image precision.
2Manufacturing precision
If a conventional ink with low wet spreadability is used to form the adhesive layer, then the image area boundaries remain sharp, but the ink cannot cover sufficient areas leading to incomplete adhesive coverage
Solution Approach 1:
The patent applies local quality by matching ink properties to the specific requirements of different image areas. For narrow image areas, low wet spreadability ink maintains sharp boundaries. For wide image areas, high wet spreadability ink ensures adequate coverage. This localized optimization resolves the contradiction between boundary precision and coverage area.
Solution Approach 2:
The patent changes the wet spreadability parameter of the ink based on the image area width. The control unit dynamically selects the appropriate ink type, thereby changing the parameter to match the printing requirements. This enables the system to achieve both sharp boundaries and adequate coverage where needed.
3Device complexity
If a single type of ink is used for all image areas, then the printing process is simple, but the system cannot simultaneously achieve both thin-line image clarity and wide image area coverage
Solution Approach 1:
The patent applies local quality by using different inks for different image areas based on their width characteristics. The control unit identifies the image area width and selects the appropriate ink type, thereby optimizing the adhesive layer formation for each specific case. This resolves the contradiction between process simplicity and image precision.
Solution Approach 2:
The patent changes the ink type parameter based on the image area width. The control unit determines the width and selects the corresponding ink, enabling the system to adapt to different printing requirements. This parameter change allows the system to achieve both thin-line clarity and wide area coverage without excessive complexity.
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
The system effectively suppresses transfer unevenness and enhances the visual clarity of thin-line images by using the appropriate ink based on image area width, ensuring a stable and glossy foil transfer.
Implementation Method 1
The second ink has a lower wet spreadability than a wet spreadability of the first ink
Data Source
AI summary
An inkjet printer for forming, on a base, an image layer and an adhesive layer on which foil is to be formed includes a first head, a second head, and processing circuitry. The first head discharges an ink for the image layer. The second head discharges inks for the adhesive layer including a first ink and a second ink. The second ink has a lower wet spreadability than a wet spreadability of the first ink. The processing circuitry controls the second head to form an image area included in the adhesive layer with the second ink in a case where a width of the image area is less than a threshold, and form the image area with the first ink in a case where the width of the image area is not less than the threshold.