Fusing Device Paper Rolling Detection via Temperature Feedback
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Solution Overview
Problem
Image forming apparatuses face challenges in determining whether a paper rolling state has occurred and if it has been resolved, primarily due to the inability to effectively utilize temperature variations of the fusing device for diagnosis.
Innovation Solution
An image forming apparatus equipped with a temperature sensor, memory, and controller that detects initial temperatures, applies power to the fusing device for a predetermined time, and judges the removal of the paper rolling state based on temperature variations, including comparisons with reference temperatures and gradients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the image forming apparatus stops operation and displays an error message when paper rolling occurs, then the paper rolling state is detected, but the apparatus cannot automatically determine whether the paper rolling has been removed
Solution Approach 1:
The patent implements a feedback mechanism by continuously monitoring the temperature of the fusing device and comparing it with reference temperatures. The temperature sensor provides continuous feedback about the fusing device state, and the controller uses this feedback to automatically determine whether paper rolling has occurred and whether it has been removed, eliminating the need for complex manual diagnosis systems.
Solution Approach 2:
The patent replaces complex mechanical or manual diagnosis systems with a thermal-based detection system. Instead of using mechanical sensors or manual inspection methods to detect paper rolling, the system uses temperature sensing and thermal analysis to automatically detect and diagnose paper rolling states, simplifying the overall system complexity.
2Ease of operation
If manual inspection methods are used to determine paper rolling state, then the diagnosis process becomes complex, but the system cannot automatically ascertain recovery
Solution Approach 1:
The patent implements self-service functionality by enabling the system to automatically detect, diagnose, and determine recovery from paper rolling states without external intervention. The temperature sensor and controller work together to autonomously monitor the fusing device temperature, compare it with reference values, and automatically ascertain whether paper rolling has been removed, eliminating the need for manual inspection and reducing diagnosis time.
Solution Approach 2:
The patent applies preliminary action by pre-storing reference temperatures and comparison criteria in the controller before operation. When paper rolling occurs, the system can immediately compare real-time temperature data against pre-established reference values, enabling rapid automatic determination of the paper rolling state and recovery status without requiring complex real-time analysis or manual intervention.
3Loss of information
If temperature sensor is used to detect fusing device temperature, then temperature variation information becomes available, but the initial art cannot utilize this information for paper rolling diagnosis
Solution Approach 1:
The patent implements a feedback mechanism by continuously monitoring the temperature of the fusing device and comparing it with reference temperatures. The temperature sensor provides continuous feedback about the fusing device state, and the controller uses this feedback to automatically determine whether paper rolling has occurred and whether it has been removed, eliminating the need for complex manual diagnosis systems.
Solution Approach 2:
The patent utilizes parameter changes by monitoring temperature variations of the fusing device as a diagnostic parameter for paper rolling detection. The system detects changes in temperature (dT) and compares them with reference temperature changes to determine the paper rolling state. This approach transforms the temperature parameter into a useful diagnostic tool, enabling precise automatic detection without requiring additional sensors or complex measurement systems.
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
Enables accurate confirmation of paper rolling occurrence and removal using temperature data, allowing for timely error handling and apparatus recovery.
Implementation Method 1
a temperature sensor to sense a temperature of the fusing device
Implementation Method 2
heats the fusing device by applying power to the fusing device for a predetermined time
Data Source
AI summary
An image forming apparatus and a control method thereof in which occurrence or removal of a paper rolling state in a fusing device is judged based on temperature of the fusing device. The apparatus includes a temperature sensor to sense temperature of the fusing device, a memory to store information about occurrence or removal of the paper rolling state, and a controller to judge occurrence or removal of the paper rolling state. The controller detects an initial temperature of the fusing device when the apparatus is turned off and then on in a state in which the information about occurrence of the paper rolling state is stored in the memory, heats the fusing device by applying power thereto for a predetermined time based on the initial temperature, and judges occurrence or removal of the paper rolling state based on temperature of the fusing device detected after power application.