Sheet Feeding Apparatus Stapled Original Detection
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Solution Overview
Problem
Conventional sheet feeding apparatuses face inefficiencies and risk of damage when detecting stapled originals, as they often incorrectly identify non-stapled sheets as stapled, leading to unnecessary stopping of the feeding process and decreased operation efficiency.
Innovation Solution
The apparatus employs multiple speed detecting units positioned along the width direction of the sheet to accurately detect the speed variations caused by stapled originals, allowing for precise identification of stapled sheets and preventing damage by stopping the feeding process only when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional sheet feeding apparatus uses single-point detection or simple oscillation detection to identify stapled originals, then the detection process is simple, but the detection accuracy is low leading to erroneous detection of non-stapled sheets as stapled
Solution Approach 1:
The patent divides the detection system into multiple independent speed detecting units positioned at different locations (first and second speed detecting units at opposite sides, third speed detecting unit at center). Each unit independently measures sheet speed, and the control unit compares these segmented measurements to detect rotation. This segmentation approach improves detection accuracy by capturing speed variations across the sheet width while keeping each individual detector relatively simple.
Solution Approach 2:
The patent combines multiple speed detecting units into a unified detection system where the control unit integrates information from all detectors. By merging the detection results from multiple positions and comparing them collectively, the system achieves high detection accuracy for stapled originals without requiring each individual detector to be overly complex.
2Reliability
If sheet feeding apparatus stops feeding upon detection of stapled original to prevent damage, then sheets and apparatus are protected from damage, but operation efficiency decreases due to unnecessary stopping when non-stapled sheets are erroneously detected
Solution Approach 1:
The system uses feedback from multiple speed detecting units to make informed decisions about stopping feeding. By continuously monitoring speed variations at multiple positions and comparing them against predetermined thresholds, the control unit provides accurate feedback about actual stapled original presence. This feedback mechanism ensures feeding stops only when genuinely needed, preventing damage while avoiding unnecessary interruptions that would reduce productivity.
3Measurement precision
If multiple speed detecting units are positioned along the width direction to detect speed variations, then detection accuracy improves, but device complexity and cost increase
Solution Approach 1:
The patent positions speed detecting units at specific strategic locations (opposite sides and center of sheet width) rather than uniformly distributing them. This local quality approach places detectors where speed variations are most indicative of stapled originals, achieving high detection accuracy with a minimal number of units. Each detector is positioned to capture critical local information about sheet rotation behavior.
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
This solution enhances the accuracy of stapled original detection, preventing damage to sheets and the apparatus while maintaining operation efficiency by correctly distinguishing between stapled and non-stapled sheets.
Implementation Method 1
a plurality of speed detecting units that respectively detect a speed of the medium fed by the feeding unit, at a plurality of positions along a width direction of the medium orthogonal to a feeding direction of the medium
Data Source
AI summary
A sheet feeding apparatus includes a feeding unit capable of feeding a sheet-like medium, plural speed detecting units capable of respectively detecting a speed of the medium fed by the feeding unit, at plural positions along a width direction of the medium orthogonal to a feeding direction of the medium, and a bound-medium detecting unit capable of detecting the medium having a part thereof bound with another one of the medium, based on the speed detected respectively by the speed detecting units.