Inkjet Printing Drying Control for Overlapping Ink Layers
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Solution Overview
Problem
Conventional inkjet printing methods fail to distinguish between regions where one ink has been applied and regions where multiple inks have been applied on non-absorbent printing media, leading to inefficient drying and increased power consumption.
Innovation Solution
An inkjet printing apparatus with separate first and second image forming units and drying units, where the drying temperature for the second ink is set lower when applied over the first ink, and the drying conditions are tailored to the type of printing medium and mode, reducing power consumption and enhancing drying efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the same drying temperature is applied to all regions regardless of ink layer composition, then the drying process is simple to control, but power consumption increases and drying efficiency decreases
Solution Approach 1:
The patent applies different drying temperatures to different regions based on the number of ink layers. Regions with multiple ink layers receive higher drying temperatures, while regions with single ink layers receive lower temperatures. This localized quality adjustment optimizes power consumption by avoiding unnecessary high-temperature drying in single-ink regions while ensuring proper drying in multi-ink regions.
Solution Approach 2:
The drying temperature is made dynamically adjustable based on the ink layer configuration. The system automatically determines the number of ink layers in each region and adjusts the drying temperature accordingly, transforming a static drying process into a dynamic one that adapts to varying printing conditions.
2Productivity
If higher drying temperature is used for all regions, then drying speed increases, but risk of ink damage and quality degradation increases
Solution Approach 1:
The patent applies higher drying temperatures only to regions with multiple ink layers where faster drying is necessary, while maintaining lower temperatures in single-ink regions to prevent ink damage. This localized temperature adjustment achieves optimal drying speed without causing harmful effects to the printed material.
Solution Approach 2:
The drying temperature parameter is changed based on the ink layer configuration. By varying the temperature parameter according to the specific printing conditions in different regions, the system achieves both fast drying where needed and ink protection where required.
3Ease of operation
If uniform drying conditions are applied to all printing regions, then the drying process is easier to manage, but drying efficiency and power utilization are suboptimal
Solution Approach 1:
The patent implements localized drying conditions where each region receives drying parameters optimized for its specific ink layer composition. This approach improves power utilization efficiency by avoiding energy waste in regions that don't require high-temperature drying, while still maintaining manageable operation through automated control.
Solution Approach 2:
The system automatically determines the ink layer configuration in each region and self-adjusts the drying parameters without requiring manual intervention. This self-service capability maintains ease of operation while achieving optimal energy utilization through intelligent, adaptive drying control.
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 apparatus effectively manages drying conditions based on printing medium type and mode, reducing power requirements and improving drying efficiency, particularly for non-absorbent media, by allowing the second ink to penetrate into the first ink layer, thus optimizing drying temperatures and loads.
Implementation Method 1
a first drying unit configured to heat the printing medium to which the first ink has been applied, and a second drying unit configured to heat the printing medium to which the second ink has been applied
Data Source
AI summary
An inkjet printing apparatus comprising, in the following order, a first image forming unit configured to form an image by applying a first ink to a printing medium, a first drying unit configured to heat the printing medium to which the first ink has been applied, a second image forming unit configured to form an image by applying a second ink to the printing medium, and a second drying unit configured to heat the printing medium to which the second ink has been applied, and wherein a drying temperature T1 of the second drying unit in a case where the second ink is applied over a region where the first ink has been applied differs from a drying temperature T2 of the second drying unit in a case where the second ink is applied to a region where the first ink has not been applied.