Sheet Alignment via Dynamic Overlap Control
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Solution Overview
Problem
Conventional sheet processing apparatuses struggle to maintain accurate alignment of sheets across multiple trays and types of paper, as they are designed for single conveying paths and do not adapt to varying destinations or paper types effectively.
Innovation Solution
The apparatus adjusts the stacking condition of sheets in a temporary stacking unit based on the conveying destination or type of paper, using mechanisms like bifurcating claws, carriage rollers, and sensors to align sheets accurately across multiple paths, including upper and lower conveying paths, and incorporates features like feelers and jogger fences for precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If sheets are made to overlap at the initiation stage of conveyance to improve alignment, then alignment accuracy is improved, but the apparatus cannot adapt to multiple conveying destinations or different paper types
Solution Approach 1:
The patent applies dynamics by making the overlap amount variable rather than fixed. The control unit dynamically adjusts the overlap amount based on the conveying destination tray and paper type, allowing the system to adapt to different conditions while maintaining alignment accuracy. This resolves the contradiction by enabling both precise alignment and versatility through conditional variability.
Solution Approach 2:
The patent changes the parameter of overlap amount based on different conveying destinations and paper types. By adjusting this critical parameter dynamically, the system achieves both accurate alignment (when optimized for each condition) and adaptability (across multiple conditions). This directly resolves the technical contradiction between precision and versatility.
2Device complexity
If a fixed overlap amount is used for all sheets, then the apparatus structure is simple, but alignment accuracy deteriorates when conveying to different trays or processing different paper types
Solution Approach 1:
The patent implements multi-functionality by enabling a single overlap control mechanism to serve multiple conveying destinations and paper types. The control unit universally applies the overlap control across different trays and paper types by adjusting the overlap amount according to the specific condition, achieving both structural simplicity and high alignment accuracy through conditional adaptability.
Solution Approach 2:
The system uses feedback from the conveying destination and paper type information to dynamically adjust the overlap amount. This feedback mechanism allows the apparatus to maintain simple structure while achieving high alignment accuracy by automatically adapting the overlap parameter based on real-time conditions.
3Adaptability or versatility
If sheets are conveyed without overlapping, then the apparatus can handle multiple destinations flexibly, but alignment accuracy deteriorates
Solution Approach 1:
The patent applies dynamics by conditionally applying overlap based on the conveying destination and paper type. The system dynamically determines whether to overlap sheets and by how much, maintaining flexibility in handling multiple destinations while ensuring alignment accuracy is improved when overlap is applied. This resolves the contradiction by making overlap a dynamic rather than static feature.
Solution Approach 2:
The patent changes the overlap parameter from a fixed state (either overlap or no overlap) to a variable state where the overlap amount is adjusted based on destination and paper type. This parameter change enables the system to maintain flexibility while achieving improved alignment accuracy through conditional overlap adjustment.
Data Source
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Figure 3A~3D
AI summary
A sheet processing apparatus (FR) includes an overlap conveying unit that conveys two or more sheets (P) in an overlapping manner; a stacking unit (21) that stacks therein the sheets conveyed in the overlapping manner; an aligning unit that includes a rotating body (41) and a regulating member (24, 25) and is configured to bring the rotating body into contact with a topmost sheet among the stacked sheets, so as to make the sheet abut the regulating member and align ends of the sheets; and a controller (FR1) that controls the overlap conveying unit. The controller is configured to determine, according to sheet information, whether to make the topmost sheet overlap in a condition of projecting from the other sheets.