Variable Rotation Paddle for Finisher Buckling Control
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Solution Overview
Problem
Finishers face challenges in successfully compiling stapled jobs due to variations in recording media types, environmental conditions, and ink content, often resulting in paper jams and poor edge registration.
Innovation Solution
A finisher equipped with a rotatable shaft and paddle units that can rotate in both forward and reverse directions, with the amount and speed of reverse rotation controlled by a controller to manage buckling, allowing for variable adjustment based on the height of the recording medium stack.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a paddle rotates in a fixed direction with fixed amount of rotation, then the structure is simple, but buckling occurs during compilation due to variations in media type, environmental conditions, and ink content
Solution Approach 1:
The paddle rotation system transitions from a fixed, static configuration to a dynamic one where the rotation amount and direction are variable. The controller adjusts the paddle's rotation based on detected stack height, enabling adaptive response to different media types, environmental conditions, and ink content variations, thereby preventing buckling while maintaining compilation success rate.
Solution Approach 2:
The system changes the operational parameters of the paddle rotation dynamically. By varying the rotation amount (and potentially speed) based on stack height detection, the system adapts to different compilation conditions without requiring complex mechanical reconfiguration, resolving the contradiction between reliability and device complexity.
2Reliability
If the paddle rotates in a reverse direction to push down buckles, then buckling is reduced, but the device complexity increases due to controlled variable rotation
Solution Approach 1:
The system implements a feedback control mechanism where the controller detects stack height and uses this information to adjust the paddle's reverse rotation amount. This closed-loop control ensures that the paddle applies appropriate force to push down buckles and improve edge registration quality without requiring overly complex mechanical structures, as the intelligence is embedded in the control logic rather than the hardware.
3Reliability
If the paddle rotation amount is increased to prevent buckling, then compilation reliability improves, but the risk of paper jams increases due to excessive rotation
Solution Approach 1:
The system dynamically adjusts the paddle rotation parameter based on stack height detection. By varying the rotation amount within an optimal range rather than using a fixed high rotation, the system prevents buckling while avoiding excessive rotation that could cause paper jams, thus resolving the contradiction between compilation reliability and paper jam risk.
Data Source
AI summary
An paddle apparatus for a finisher includes a rotatable shaft and a paddle coupled to the rotatable shaft. The paddle is rotatable in a forward direction to compile a recording medium toward an end of a register tray of the finisher, and is rotatable in a reverse direction to apply a downward force to the compiled recording medium. An amount that the paddle is rotated in the reverse direction can be varied based on a height of the compiled recording medium in the register tray.