Dynamic Pressing Mechanism for Paper Curl Reduction
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Solution Overview
Problem
Existing ink jet printers face issues with paper curling and damage during discharge, leading to poor stacking properties due to strong pressing forces that can cause scratches on the paper surface.
Innovation Solution
A processing apparatus with a first contact section that can switch between a pressing position and a retracted position to corrugate the paper in the medium width direction, reducing the occurrence of damage by releasing the pressing force during discharge, and a second contact section to further enhance corrugation and stacking properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a pressing force is applied to the paper by the first portions and second portions to corrugate the paper and reduce curling, then the stacking properties are improved, but the paper surface may be damaged with scratches
Solution Approach 1:
The first contact section is made movable between a first position for pressing the medium and a second position closer to the one side than the first position. This dynamic positioning allows the pressing force to be applied only when needed for corrugation, and released during discharge to prevent surface damage, thus resolving the contradiction between improving stacking properties and preventing paper damage
Solution Approach 2:
The first contact section is switched between the first position and the second position at specific timings during the medium processing cycle. By periodically applying and releasing the pressing force in sync with the medium transport and discharge cycle, the system achieves both effective corrugation for stacking and protection against surface damage
2Stability of the object's composition
If the first contact section is positioned to press the medium for corrugation, then the medium stacking properties are improved, but the pressing force may cause damage to the medium surface
Solution Approach 1:
The first contact section transitions from a static pressing structure to a dynamic one that can change position. By moving between the first position (for corrugation) and the second position (closer to the one side, reducing pressing force), the system maintains medium integrity while achieving good stacking properties
Solution Approach 2:
The first contact section is positioned and pressed in advance during the medium transport phase to achieve corrugation before discharge. This preliminary corrugation action ensures good stacking properties, while the subsequent position change before discharge prevents surface damage
Data Source
AI summary
A processing apparatus includes a processing section configured to perform processing to a medium, a discharge section configured to discharge the medium that has been transported from the processing section along a medium transport path, and a first contact section configured to come into contact with the medium that has passed through the processing section and being transported toward the discharge section in the medium transport path to press the medium from one side toward the other side. The first contact section is switched between a first position for pressing the medium and a second position that is closer to the one side than the first position.