Fuser Belt Temperature Control via Dual-Sensor Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The ODF type fuser experiences temperature deviations between the heating member and the fusing belt, leading to suboptimal printing quality due to cold or hot offset issues, as the existing methods of controlling heat generation are inadequate in maintaining a consistent fusing temperature, affecting the fusing level of toner images.
Innovation Solution
The implementation of a dual-temperature sensing system, where a first temperature sensor monitors the fusing belt's outer surface and a second temperature sensor monitors the heating member, allowing for precise control of heat generation based on the belt's temperature to maintain a stable fusing nip temperature, thereby preventing cold or hot offset and ensuring consistent printing quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the heating member generates high heat to maintain fusing temperature, then the fusing level of toner is improved, but temperature deviation between heating member and fusing belt increases causing hot offset
Solution Approach 1:
The patent implements a feedback control system where a temperature sensor detects the actual temperature of the fusing belt, and this detected temperature is fed back to a controller that adjusts the heating member's power consumption accordingly. This closed-loop feedback mechanism dynamically compensates for temperature deviations between the heating member and fusing belt, preventing both cold and hot offset while maintaining reliable fusing levels.
2Temperature
If the heating member generates insufficient heat, then temperature deviation is reduced, but cold offset occurs due to insufficient fusing temperature
Solution Approach 1:
The feedback control system continuously monitors the fusing belt temperature and adjusts the heating member's power output in real-time. When the belt temperature drops below the target range, the controller increases heating power to prevent cold offset, while the feedback mechanism ensures the temperature doesn't overshoot, thus maintaining both temperature consistency and reliable fusing levels.
3Manufacturing precision
If temperature control is improved to prevent offset, then printing quality is improved, but device complexity increases due to additional temperature sensor
Solution Approach 1:
The patent adds a single temperature sensor to create a closed-loop feedback system that automatically adjusts heating power. This feedback mechanism provides precise temperature control and prevents offset issues, improving printing quality. The system's automated control eliminates the need for complex manual monitoring and adjustment procedures, making the enhanced control system manageable despite the added sensor.
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 approach effectively stabilizes the fusing temperature, reducing the occurrence of cold or hot offset, improving printing quality and reducing the first print out time by ensuring the fusing belt reaches the optimal temperature before initiating printing, while also preventing overheating of the heating member.
Implementation Method 1
a heating member 10... generating heat
Implementation Method 2
heat generated by a heating member 10... temperature of a belt... in a fusing nip
Data Source
AI summary
A fuser includes a heating member, a fusing belt including an inner circumferential surface, the fusing belt to be heated by the heating member by having the inner circumferential surface of the fusing belt in contact with the heating member, a first temperature sensor to sense a first temperature of an outer circumferential surface of the fusing belt, and a second temperature sensor to sense a second temperature of the heating member.