Post-Processing Device Dynamic Gas Blowing for Paper Stacking
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Solution Overview
Problem
Existing image forming apparatuses face issues with improper stacking of media due to uneven gas blowing, which affects the alignment and stacking of different types of paper, such as thin and thick paper, leading to potential buckling and incorrect ordering.
Innovation Solution
A post-processing device with a blow-out unit that adjusts the direction of gas blowing based on the type of medium, using blow-out holes that can be oriented differently for plain, thin, and thick papers to prevent buckling and ensure proper alignment and stacking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gas is blown in the same direction for all medium types, then the cooling effect is consistent, but improper stacking occurs due to uneven gas distribution on different medium types
Solution Approach 1:
The blow-out unit is configured to change the gas blowing direction dynamically based on medium type. The gas blowing direction is set to substantially parallel to the leading end for thin media, and substantially perpendicular to the leading end for thick media, allowing the system to adapt to different medium characteristics without manual intervention
Solution Approach 2:
The system changes the gas blowing parameters (direction and angle) according to medium type. By adjusting the gas blowing direction parameter based on whether the medium is thin or thick, the system achieves proper gas distribution and prevents improper stacking while maintaining a relatively simple device structure
2Manufacturing precision
If gas blowing direction is adjusted for different medium types, then stacking accuracy improves, but the control mechanism becomes more complex
Solution Approach 1:
The blow-out unit dynamically adjusts gas blowing direction based on medium type detection. The system automatically switches between different gas blowing patterns (parallel to leading end for thin media, perpendicular for thick media), achieving precise alignment without requiring complex manual control mechanisms
Solution Approach 2:
The system performs self-adjustment by automatically detecting medium type and selecting the appropriate gas blowing direction. This self-service capability eliminates the need for complex external control systems while maintaining high alignment precision across different medium types
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 solution effectively reduces improper stacking by ensuring the gas blowing direction aligns with the medium's characteristics, preventing buckling and maintaining proper alignment and order of paper sheets during output.
Implementation Method 1
a blow-out unit that is disposed below the output unit and that blows gas toward the medium that is output
Data Source
AI summary
A post-processing device includes an output unit that outputs a medium; a stacking unit on which the medium that is output is stacked; and a blow-out unit that is disposed below the output unit and that blows gas toward the medium that is output, wherein a direction in which the gas is blown differs in accordance with a type of the medium.