Movable Drying Unit for Curling Sheet Protection
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Solution Overview
Problem
Existing inkjet printing apparatuses face challenges in preventing image damage during color measurement, as the fixed distance between the drying unit and the sheet can cause rubbing, especially with sheets having strong curling characteristics, leading to inefficiencies in throughput and accuracy.
Innovation Solution
A printing apparatus with a mechanism to vary the distance between the drying unit and the sheet, allowing for adjustable drying control based on operational modes and sheet types, incorporating a movable drying unit and discharge guide to optimize drying and measurement processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the drying unit is arranged with a fixed interval to the sheet, then the structure is simple, but the printed image may be damaged due to rubbing, especially with sheets having strong curling characteristics
Solution Approach 1:
The drying unit is designed with a variable interval mechanism that allows the distance between the drying unit and the sheet to be dynamically adjusted based on sheet characteristics. This resolves the contradiction by transitioning from a fixed static structure to a dynamic adjustable structure, preventing image damage while maintaining operational simplicity through automated control.
Solution Approach 2:
The interval between the drying unit and the sheet is changed as a variable parameter rather than a fixed value. By adjusting this parameter according to sheet curling characteristics and drying requirements, the system prevents image damage without significantly increasing structural complexity, as the change is implemented through control mechanisms rather than fundamental structural redesign.
2Object-affected harmful factors
If the relative distance between the drying unit and the sheet is made variable to prevent image damage, then image damage is prevented, but the drying range varies causing losses in drying row number or non-dried patch rows, affecting total throughput and color measurement accuracy
Solution Approach 1:
The system adjusts the interval parameter to optimize the balance between preventing image damage and maintaining adequate drying range. By carefully controlling the variable interval within specific ranges, the system prevents rubbing damage while ensuring sufficient drying effectiveness across all required rows, thus maintaining throughput and measurement accuracy.
Solution Approach 2:
The system incorporates control mechanisms that monitor drying effectiveness and adjust the interval accordingly. This feedback loop ensures that the variable interval setting achieves both image protection and sufficient drying coverage, preventing losses in drying row number and maintaining color measurement accuracy through adaptive optimization.
3Adaptability or versatility
If the relative distance is varied to accommodate different sheet types, then adaptability to different sheet characteristics is improved, but the control complexity increases
Solution Approach 1:
The system uses parameter adjustment (interval variation) as the primary adaptation mechanism for different sheet types. This approach provides high adaptability while keeping control complexity manageable, as it involves adjusting a single key parameter rather than reconfiguring multiple system components for each sheet type.
Solution Approach 2:
The variable interval mechanism serves multiple functions: preventing image damage, accommodating different sheet curling characteristics, and optimizing drying effectiveness. This multi-functionality achieves high adaptability without proportionally increasing control complexity, as a single mechanism handles multiple adaptation requirements.
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 solution prevents image damage, enhances the throughput of color measurement, and improves colorimetric accuracy by ensuring efficient drying control and minimizing interference between the drying unit and the sheet.
Implementation Method 1
a drying unit, provided downstream of the colorimetric measurement unit in the conveyance direction, configured to perform drying of the sheet subjected to the printing by the printing unit
Data Source
AI summary
There is provided a printing apparatus capable of improving total throughput of color measurement and preventing damage to a printed image. Therefore a colorimetric housing 180 including a drying unit 140 or a discharge guide 16 is structured to be movable upwards and downwards, and a distance between the drying unit 140 and the discharge guide 16 is changed corresponding to an operational mode or a kind of a sheet.