Sheet Transport Mechanism With Distributed Curl Correction
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Solution Overview
Problem
Existing sheet handling apparatuses fail to sufficiently correct sheet curl due to curl correction mechanisms being limited to a single location, leading to incomplete curl correction of sheets transported to storage mechanisms or ejection outlets.
Innovation Solution
A sheet transport mechanism with multiple curl correction units positioned along the transport route between a feeding and acceptance mechanism, each unit creating creases at different points to enhance curl correction, utilizing flanges on pulleys to contact and straighten sheets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single curl correction unit is used, then the device complexity is reduced, but the curl correction effectiveness is insufficient
Solution Approach 1:
The curl correction mechanism is divided into multiple independent curl correction units positioned at different locations along the transport route. Each unit independently creates creases to correct curl, with the first unit positioned upstream and the second unit positioned downstream, working sequentially to achieve comprehensive curl correction throughout the sheet's journey from feeding to acceptance mechanism
Solution Approach 2:
Different curl correction units are positioned at specific locations along the transport route where curl correction is most needed. The first curl correction unit is positioned near the feeding mechanism to address initial curl, while the second curl correction unit is positioned near the acceptance mechanism to ensure final straightening, providing localized correction tailored to each section's requirements
2Manufacturing precision
If multiple curl correction units are added, then the curl correction effectiveness is improved, but the device complexity increases
Solution Approach 1:
Multiple curl correction units are integrated into a single sheet handling apparatus, sharing common structural elements such as the transport mechanism and control system. The multiple units work in coordination rather than isolation, with their combined effect achieving superior curl correction while their integration minimizes the overall complexity increase compared to having completely separate systems
3Manufacturing precision
If curl correction units are positioned at multiple locations, then the sheet straightening completeness is improved, but the device complexity increases
Solution Approach 1:
The first curl correction unit performs preliminary curl correction upstream in the transport route, addressing curl issues before the sheet reaches the acceptance mechanism. This preliminary action reduces the burden on downstream components and ensures that sheets are pre-straightened, improving overall straightening completeness while distributing the correction workload across multiple positions
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 multiple curl correction units effectively improve curl correction by creating multiple creases along the sheet's transport path, ensuring sheets are fully straightened before recognition and storage, enhancing the overall curl correction process.
Implementation Method 1
each comprising a contact unit, where the contact unit comes into contact with the sheet that is transported by the transport unit
Implementation Method 2
creating creases at different points to enhance curl correction, utilizing flanges on pulleys to contact and straighten sheets
Data Source
AI summary
Provided is a sheet transport mechanism disposed between a feeding mechanism feeding out a sheet and an acceptance mechanism receiving the sheet. The sheet transport mechanism includes: a transport unit that transports the sheet; and a plurality of curl correction units each including a contact unit which comes into contact with the sheet that is transported by the transport unit. The plurality of curl correction units is disposed at positions different from each other on a transport route of the transport unit, respectively.