Separator Roll Positioner for Media Feed Error Correction
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Solution Overview
Problem
Existing media feeding mechanisms in image forming devices face challenges in reliably separating heavy and light weight media sheets, as the fixed projection of separator rolls in removable media dams does not accommodate varying media types effectively, leading to misfeeds and inefficiencies.
Innovation Solution
A method that adjusts the position and rotational speed of separator rolls based on sensed media type, using a media type sensor, positioner motor, and drive source to optimize separation forces, allowing for adjustable projection of separator rolls and adaptive feeding rates to prevent misfeeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separator rolls are fixed in projection within removable media dams, then device complexity is reduced and ease of manufacture is improved, but adaptability to different media types deteriorates leading to misfeeds
Solution Approach 1:
The separator roll projection is made dynamically adjustable through a positioner mechanism that can change the roll's position relative to the media dam surface. This allows the same separator roll to adapt to different media types (heavy vs. light weight) by adjusting its projection distance, resolving the contradiction between fixed simple design and adaptive functionality.
2Force
If separator roll projection is increased to separate heavy media sheets, then separation force is improved, but light weight media may become stuck requiring reduced projection
Solution Approach 1:
The system changes the physical parameter of separator roll projection distance based on media type detection. For heavy media, the projection is increased to provide greater separation force; for light weight media, the projection is reduced to prevent sticking. This parameter adjustment resolves the contradiction between needing high force for heavy media and low projection for light media.
3Adaptability or versatility
If separator roll position is made adjustable to accommodate different media types, then adaptability is improved, but device complexity increases
Solution Approach 1:
The separator roll positioner system uses media type detection to automatically adjust the separator roll projection without requiring manual intervention. The system serves itself by detecting media characteristics and autonomously configuring the appropriate separator roll position, reducing the perceived complexity for the user while maintaining adaptability.
4Productivity
If media feeding speed is increased to improve productivity, then output is improved, but feed errors increase requiring speed reduction
Solution Approach 1:
The media feeding speed is made dynamically adjustable based on detected media type. For heavy media sheets, the feeding speed is reduced to prevent feed errors and misfeeds. For light weight media, higher speeds can be used to maintain productivity. This dynamic speed adjustment resolves the contradiction between high productivity and high reliability.
Data Source
AI summary
A method of using a separator roll positioner and separator roll rotational speed to correct media feed errors by angularly rotating a separator roll between a retracted position and an extended position to adjust the height of the separator roll with respect to a media contact surface or by varying separator roll rotational speed thereby varying the media sheet separation force.