Duplex Scanner Elastic Pressing Member for Sheet Deflection Control
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Solution Overview
Problem
Conventional duplex scanning apparatuses face challenges in scanning documents of varying thicknesses, leading to paper jams, image distortion, and vertical deflections due to the need for adjustable clearances that compromise scan quality.
Innovation Solution
A duplex scanning apparatus with an elastic pressing member positioned between scan positions to stabilize and press documents, preventing vertical deflections and ensuring smooth passage through the scanning modules, thereby enhancing scan quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the sheet passageway is configured to be wide to allow smooth passage of various thickness sheets, then thicker sheets can pass without jamming, but thin sheets produce vertical deflections causing image distortion
Solution Approach 1:
The patent applies parameter changes by making the passageway width adjustable rather than fixed. The optical module can move between a first position (for thin sheets) and a second position (for thick sheets), allowing the system to adapt its parameters to match the sheet thickness being scanned. This resolves the contradiction by enabling the system to maintain high scan quality across varying sheet thicknesses through dynamic parameter adjustment.
2Manufacturing precision
If the passageway clearance is reduced to prevent vertical deflections of thin sheets, then scan quality improves, but thicker sheets cannot enter and pass the scan region smoothly
Solution Approach 1:
The patent implements dynamics by making the optical module position adjustable rather than fixed. The system dynamically changes the optical module's position between a first position (closer to the sheet path for thin sheets) and a second position (farther for thick sheets) based on the sheet thickness. This dynamic adaptation allows the system to maintain optimal scan quality for thin sheets while accommodating thick sheets without jamming.
3Device complexity
If the passageway is configured with fixed clearance, then the structure is simple, but it cannot accommodate both thin and thick sheets with optimal scan quality
Solution Approach 1:
The patent applies universality by designing the optical module to serve multiple functions through position adjustment. The same optical module can scan both thin and thick sheets by changing its position, eliminating the need for separate scanning systems for different sheet types. This multi-functional capability maintains scan quality across various sheet thicknesses while avoiding the complexity of multiple dedicated 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 apparatus effectively stabilizes documents of various thicknesses, reducing the likelihood of paper jams and image distortion, ensuring high-quality scans by maintaining document alignment and preventing curl-induced issues.
Implementation Method 1
an elastic pressing member, disposed between the first scan position and the second scan position, pushes the original sheet towards an original supporting plane
Data Source
AI summary
A duplex scanning apparatus includes a passageway, a first optical module, a second optical module, a transporting mechanism and an elastic pressing member. The first optical module is disposed on one side of the passageway. The second optical module is disposed on the other side of the passageway. The transporting mechanism transports an original sheet through the passageway and past a first scan position of the first optical module and a second scan position of the second optical module, and images of front and reverse sides of the original sheet are obtained, respectively. The elastic pressing member, disposed between the first scan position and the second scan position, pushes the original sheet towards an original supporting plane.