Rotatable Heating Member Abrasion Control via Temperature-Adaptive Rubbing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing image heating apparatuses face issues with deep abrasion traces on the rotatable heating member due to projected edges of recording materials, leading to uneven glossiness, especially when the temperature of the rotatable heating member is increased, as the strength of the heating member is lowered, and conventional countermeasures are inadequate in managing this issue effectively.
Innovation Solution
An image heating apparatus equipped with a rotatable rubbing member that is controlled by a temperature sensor and moving mechanism to adjust its position relative to the rotatable heating member, ensuring optimal rubbing operations based on detected temperature, thereby minimizing abrasion and maintaining image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the temperature of the rotatable heating member is increased, then the heating efficiency is improved, but the strength of the heating member is lowered, causing deeper abrasion traces
Solution Approach 1:
The rubbing member is made movable between a spaced position and a contact position, allowing the system to dynamically adjust the rubbing operation based on temperature conditions. When the heating member temperature is high, the rubbing member contacts the surface to remove abrasion traces; when temperature is low, the rubbing member is spaced to avoid unnecessary wear. This dynamic adjustment resolves the contradiction by adapting the rubbing intensity to the thermal state of the heating member.
Solution Approach 2:
The system changes the operational parameters of the rubbing member based on temperature detection. The controller adjusts the position of the rubbing member (contact or spaced) according to the detected temperature of the heating member. This parameter change allows the system to optimize both heating efficiency and surface integrity by applying rubbing only when thermally appropriate.
2Reliability
If the rubbing member is contacted to the rotatable heating member to execute rubbing operation, then the trace of abrasion is removed, but the life of the rotatable heating member is shortened
Solution Approach 1:
The rubbing operation is performed periodically rather than continuously, based on the number of sheets processed or detected temperature conditions. The rubbing member contacts the heating member surface only when needed (periodically), removing abrasion traces at appropriate intervals while minimizing overall contact time. This periodic action maintains surface quality without excessively shortening the heating member's operational life.
Solution Approach 2:
The system uses the rubbing member to self-correct surface defects on the heating member. When abrasion traces are detected or predicted based on sheet count or temperature, the rubbing member automatically contacts the surface to remove these traces, enabling the system to maintain its own surface quality without external intervention. This self-service approach extends heating member life by addressing surface issues only when necessary.
3Duration of action of stationary object
If the rubbing member is spaced from the rotatable heating member, then the life of the heating member is extended, but deep abrasion traces occur when temperature is high
Solution Approach 1:
The system incorporates temperature detection and control feedback to determine when the rubbing member should contact the heating member. The controller monitors the temperature of the rotatable heating member and uses this feedback to decide whether to bring the rubbing member into contact with the surface. This feedback mechanism ensures that rubbing operations are performed only when temperature conditions are appropriate, preventing both unnecessary wear and inadequate surface maintenance.
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
The solution effectively reduces deep abrasion traces on the rotatable heating member, even at elevated temperatures, thereby preventing uneven glossiness and extending the lifespan of the heating member by dynamically adjusting the rubbing operation based on temperature readings.
Implementation Method 1
a temperature sensor for detecting a temperature of the rotatable heating member
Implementation Method 2
a rotatable rubbing member for rubbing the rotatable heating member
Implementation Method 3
execute a rubbing operation such that the rotatable rubbing member rubs the surface of the rotatable heating member
Data Source
AI summary
An image heating apparatus includes a rotatable heating member for heating an image on a recording material in a nip; a nip-forming member for forming the nip together with the heating member; a rotatable rubbing member for rubbing the heating member; a temperature sensor for detecting a temperature of the heating member; a moving mechanism for moving the rubbing member from a position where it is spaced from the heating member to a position where it rubs a surface of the heating member; and a controller for executing, by moving the rubbing member to the position where it rubs the surface of the heating member, a rubbing operation such that the rubbing member rubs the surface of the heating member. The controller executes the rubbing operation depending on the temperature detected by the temperature sensor when the recording material passes through the nip.