Movable Indicator for Sheet Feeder Alignment
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Solution Overview
Problem
Existing image reading and forming devices struggle to accurately align the center of documents with different widths within a mixed document bundle, leading to instability and skew during feeding.
Innovation Solution
A sheet feeder system that includes a movable indicator plate with a cover and press rollers, allowing the indicator to be positioned adjacent to the document for precise alignment of the document's center with the conveying reference position, even for mixed document bundles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed indicator is disposed on the upper cover, then the indicator is always visible, but the indicator cannot be adjacent to the sheet for precise alignment
Solution Approach 1:
The indicator is made movable between a first position adjacent to the sheet on the sheet placement unit and a second position farther from the sheet placement unit. This dynamic positioning allows the indicator to be close to the sheet for precise alignment while being movable to other positions when not in use, resolving the contradiction between visibility and alignment precision.
2Ease of operation
If the indicator is positioned far from the sheet, then the indicator does not interfere with sheet setting, but alignment precision deteriorates
Solution Approach 1:
The indicator can be positioned at a first position adjacent to the sheet for precise alignment or moved to a second position farther from the sheet placement unit when not needed, allowing the system to balance between alignment precision and ease of sheet setting without permanent interference.
3Measurement precision
If the indicator is always adjacent to the sheet, then alignment precision is maximized, but the indicator interferes with sheet setting operations
Solution Approach 1:
The movable indicator can be positioned adjacent to the sheet only when needed for alignment, and moved away when sheet setting operations are performed, thus maximizing alignment precision without permanently interfering with sheet setting ease.
Data Source
AI summary
A sheet feeder includes a sheet placement unit to place a sheet, and an indicator indicating a predetermined position at which the sheet is to be set on the sheet placement unit. The indicator is movable between a first position at which the indicator is adjacent to or in contact with the sheet on the sheet placement unit and a second position farther than the first position from the sheet placement unit.