Drying Apparatus Moisture Feedback Control Inkjet Offset
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Solution Overview
Problem
Existing image forming systems, particularly those with inkjet type image forming apparatuses, face challenges in achieving optimal drying of recording media, leading to issues like offset, image blur, yellowing, and curling due to insufficient or excessive drying, which requires cumbersome adjustments and lacks effective control mechanisms.
Innovation Solution
A drying apparatus equipped with a conveyance part, heating part, measurement part, and controller that conveys and dries the medium while measuring moisture content and adjusting energy supply to maintain optimal drying, using a combination of conveyance and heating controls based on estimated moisture levels to prevent offset and curling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the drying apparatus uses fixed energy supply and conveyance speed, then the device complexity is low, but the drying quality deteriorates due to insufficient control over moisture removal
Solution Approach 1:
The drying apparatus employs a feedback control mechanism where a measurement part detects moisture content in the recording medium, and a controller adjusts the energy supply amount based on this detection. This closed-loop feedback system dynamically optimizes drying quality by matching energy input to actual moisture levels, resolving the contradiction between high drying precision and device complexity.
Solution Approach 2:
The system changes operational parameters (energy supply amount and conveyance speed) based on detected moisture content. The controller dynamically adjusts these parameters to achieve optimal drying conditions for different moisture levels, thereby improving drying quality without requiring overly complex fixed mechanisms.
2Manufacturing precision
If the drying apparatus adjusts energy supply based on moisture measurement, then the drying quality improves, but the device complexity increases due to additional measurement and control components
Solution Approach 1:
The measurement part continuously monitors moisture content and provides feedback to the controller, which adjusts energy supply accordingly. This feedback loop ensures uniform drying across different regions and conditions while keeping the control mechanism relatively simple through automated closed-loop control.
Solution Approach 2:
The drying apparatus performs self-adjustment by automatically modifying energy supply based on its own moisture measurements. This self-service capability eliminates the need for complex external control systems or manual intervention, achieving high drying uniformity with minimal added complexity.
3Reliability
If the drying apparatus uses high energy supply to ensure adequate drying, then insufficient drying is prevented, but excessive drying causes yellowing and curling
Solution Approach 1:
The controller dynamically changes the energy supply parameter based on real-time moisture content measurements. When moisture content is high, energy supply is increased to prevent insufficient drying; when moisture content is low, energy supply is reduced to avoid yellowing and curling. This dynamic parameter adjustment resolves the contradiction between drying sufficiency and preventing harmful effects.
Solution Approach 2:
The measurement part provides continuous feedback on moisture content, allowing the controller to adjust energy supply in real-time. This feedback mechanism prevents both insufficient drying and excessive drying by maintaining energy input within optimal ranges, thereby eliminating yellowing and curling while ensuring adequate drying.
4Ease of operation
If the drying apparatus operates without moisture measurement, then the device complexity is low, but offset and image blur occur due to insufficient drying control
Solution Approach 1:
The measurement part automatically detects moisture content and provides feedback to the controller, which adjusts energy supply accordingly. This automated feedback system maintains high image quality by preventing offset and blur through proper drying control, while keeping the operation simple as no manual intervention is required.
Solution Approach 2:
The drying apparatus performs self-adjustment based on its own moisture measurements, automatically optimizing drying conditions to prevent image defects. This self-service capability maintains excellent image quality without requiring complex user operation or external control systems.
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 controls the drying process to prevent offset and curling by adjusting energy application and conveyance speed, ensuring consistent and uniform drying, thereby improving image quality and reducing operational complexity.
Implementation Method 1
irradiates the image (the ink) on the recording medium with light, evaporates moisture contained in the ink using energy generated when the ink absorbs the light
Implementation Method 2
evaporates moisture contained in the ink using energy generated when the ink absorbs the light
Implementation Method 3
evaporates moisture contained in the ink using energy generated when the ink absorbs the light
Data Source
AI summary
A drying apparatus which dries a medium on which an image is formed with ink while conveying the medium includes a conveyance part, a heating part, a measurement part and a controller. The conveyance part conveys the medium in a predetermined conveyance direction. The heating part supplies energy to the image on the sheet conveyed in the conveyance part and dries the image. The measurement part measures a value accompanied with moisture contained in the medium. The controller estimates an amount of moisture contained in the medium based on the value measured by the measurement part, and controls at least one of the conveyance part and the heating part so as to change an amount of the energy supplied to the image based on the estimated amount of moisture.