Transport Apparatus Dynamic Load Detection for Paper Jams
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Solution Overview
Problem
Existing transport apparatuses in scanners and printers face challenges in accurately detecting paper jams and overload states, particularly when dealing with varying paper sizes and types, leading to potential damage due to inappropriate error detection criteria.
Innovation Solution
A transport apparatus equipped with a load detecting sensor and a processor that adjusts detection criteria based on the type of medium being transported, using a combination of continuous and cumulative error counting modes depending on the paper size and other factors, to determine abnormal states effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed threshold for current value is used to detect overload, then the detection method is simple, but the detection accuracy deteriorates when dealing with varying paper sizes and types
Solution Approach 1:
The patent applies dynamics by making the overload detection threshold variable rather than fixed. The threshold is dynamically adjusted based on the detected paper size, with different threshold values applied to different paper formats (e.g., A4, B4, A3). This allows the system to maintain high detection accuracy across varying paper sizes and types while managing complexity through a structured lookup approach.
Solution Approach 2:
The patent changes the parameter of the detection threshold based on the paper size parameter. By establishing a correspondence between paper size parameters and threshold parameters, the system adapts the detection criteria to match the specific characteristics of each paper type, thereby improving measurement precision without requiring completely different detection methods for each paper size.
2Reliability
If the integrated number of abnormal load occurrences is used as the determination criterion, then the false detection rate is reduced, but the response time to actual paper jams increases
Solution Approach 1:
The patent applies dynamics by making the determination criterion adaptive rather than static. Instead of using a fixed integrated threshold for all paper sizes, the system dynamically adjusts the determination criterion based on the paper size being transported. This allows the system to maintain reliability by reducing false detections while simultaneously improving response time by optimizing the criterion for each specific paper type.
Solution Approach 2:
The patent applies local quality by tailoring the detection criterion to the specific local condition of each paper size. Different paper sizes have different optimal detection criteria, and the system provides this localized optimization by selecting appropriate criteria based on the detected paper format, thereby achieving both high reliability and fast response for each specific case.
3Measurement precision
If a single determination criterion is used for all paper sizes, then the system is easy to operate, but the detection accuracy deteriorates for specific paper types
Solution Approach 1:
The patent applies universality by creating a single detection system that handles multiple paper sizes and types through a unified structure. The system maintains ease of operation by presenting a single interface to the user, while internally it performs multi-functional detection by selecting appropriate criteria based on the detected paper size. This allows the system to be both easy to operate and accurate for specific paper types.
Solution Approach 2:
The patent uses dynamics to enable the single system to adapt its behavior based on the input paper size. The determination criterion dynamically changes according to the paper size detected, allowing the system to maintain operational simplicity while achieving high detection accuracy for each specific paper type through automatic adaptation.
Data Source
AI summary
In a continuous mode, when a state in which a current value, which is output of a load detecting sensor, is equal to or more than a predetermined threshold (a current value) continues for a predetermined threshold (the number of times), it is determined that transportation is abnormal. In a cumulative mode, when the total number of times by which the current value, which is the output of the load detecting sensor, is equal to or more than the predetermined threshold (the current value) is equal to or more than a predetermined threshold, it is determined that the transportation is abnormal. A controller sets a detection mode of a first medium to the continuous mode, and sets a detection mode of a second medium to the cumulative mode.