Tensioned Strap Edge Holder for Media Deformation Control
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Solution Overview
Problem
Imaging systems face issues with media deformation and quality errors due to ink or heat effects, particularly at the edges of the media, which can lead to interference with other components during printing or scanning operations.
Innovation Solution
An edge holder device is introduced to retain the edges of the media to the operation surface, using a tensioned strap mechanism that is removable and designed to break if impacted, preventing deformation and maintaining image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vacuum or negative pressure is applied to retain media to the operation surface, then media retention is improved, but edge deformation still occurs and media may elevate above the surface
Solution Approach 1:
The solution divides the media retention function into two segments: vacuum pressure applied to the bulk of the media through the operation surface, and physical edge holders positioned at the media edges. This segmentation allows the vacuum to handle general retention while edge holders specifically prevent edge deformation and elevation, resolving the contradiction between overall retention and edge stability.
Solution Approach 2:
Edge holders act as intermediary elements between the vacuum system and the media edges. These holders provide direct physical contact and support at the vulnerable edge regions, mediating the force distribution to prevent edge deformation while allowing the vacuum to maintain overall media retention without causing edge-related issues.
2Manufacturing precision
If media is retained closely to the operation surface to prevent deformation, then image quality is improved, but media may interfere with other components like printhead carriage
Solution Approach 1:
The edge holders provide localized support only at the media edges, allowing the bulk of the media to maintain its natural position close to the operation surface for high-quality imaging. This local quality approach ensures that edge stability is enhanced without forcing the entire media stack closer to the surface, thereby avoiding interference with printhead carriage or other components.
3Stability of the object's composition
If edge holders are made robust to prevent deformation, then media stability is improved, but device complexity increases and components may be damaged on impact
Solution Approach 1:
The edge holders are designed as inexpensive, replaceable components that can be easily manufactured from simple materials. Rather than creating a complex, robust permanent structure, the solution uses simple, replaceable edge holders that provide adequate stability for their intended lifespan and can be replaced if damaged, reducing overall device complexity while maintaining media stability.
Solution Approach 2:
The edge holders are positioned and designed to absorb or cushion any potential impact forces before they can reach more critical components. This beforehand cushioning approach protects expensive components like the printhead carriage by placing simple, sacrificial edge holders in the potential impact path, reducing device complexity while ensuring media stability during operation.
Data Source
AI summary
In an example, an edge holder may include a strap, a first end cap fixed to the strap, and a second end cap fixed to an opposite end of the strap from the first end cap. The second end cap may include a fixed end and a cam engaged with the fixed end. The cam may adjustably tension the strap between the first end cap and the second end cap.