Multi-Section Heating Roller for Variable Sheet Size Energy Efficiency
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Solution Overview
Problem
Conventional heating rollers with a single heater waste energy and lead to overheating when handling sheets of different sizes, as the entire heater length is used regardless of sheet size, resulting in inefficient energy use and potential system pauses.
Innovation Solution
A heating roller with three heaters of different sections and a rotating base that adjusts position based on sheet width, allowing for optimal heat distribution and energy use across various sheet sizes, combined with a control processor to manage the heating sections and toner fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single heater covering the entire axial length of the heating roller is used, then the maximum copy area can be designed to be equal to the A3 size, but energy is wasted when handling smaller sheets (e.g., A4 size) and the heating roller overheats in the axial areas not covered by sheets
Solution Approach 1:
The heating roller is divided into multiple heating sections (first, second, and third heating sections) along the axial direction, each corresponding to different sheet size ranges. This segmentation allows only the necessary heating sections to be activated based on the inserted sheet size, preventing energy waste in areas not covered by the sheet.
Solution Approach 2:
The heating roller employs a rotatable base that can be driven to different position states to selectively position different heating sections facing the pressure roller. This dynamic adjustment allows the system to adapt the heating configuration to match the sheet size being processed, ensuring energy efficiency and preventing overheating.
2Adaptability or versatility
If a single heater covering the entire axial length of the heating roller is used, then the maximum copy area can be designed to be equal to the A3 size, but the temperature in the axial areas on two sides of the heating roller gets too high when handling smaller sheets, causing the copier to enter a pause state
Solution Approach 1:
The heating roller is divided into multiple heating sections (first, second, and third heating sections) along the axial direction, each corresponding to different sheet size ranges. This segmentation allows only the necessary heating sections to be activated based on the inserted sheet size, preventing temperature rise in areas not covered by the sheet.
Solution Approach 2:
The heating roller employs a rotatable base that can be driven to different position states to selectively position different heating sections facing the pressure roller. This dynamic adjustment ensures that heating is applied only where needed, preventing overheating and maintaining stable operation.
3Loss of energy
If three heaters with different heating sections are used to handle various sheet sizes, then energy waste and overheating are avoided, but the device complexity increases due to the need for a rotating base and driving mechanism
Solution Approach 1:
The rotatable base serves multiple functions: it positions different heating sections, acts as a support structure for the heaters, and integrates with the driving mechanism for automated control. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
Solution Approach 2:
The dynamic positioning system allows a single heating roller structure to perform multiple heating configurations, replacing what would otherwise require multiple separate heating rollers or complex independent heating control systems for different zones.
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 efficient printing or copying of multiple sheet sizes while preventing overheating and energy waste, ensuring stable operation and meeting environmental energy-saving requirements.
Implementation Method 1
first to third heaters, which are mounted on the base, and respectively have a first heating section, a second heating section and a third heating section
Data Source
AI summary
A heating roller includes: a roller cylinder rotatably disposed; a base rotatably disposed in the roller cylinder; first to third heaters, which are mounted on the base and respectively have a first heating section, a second heating section and a third heating section extending respectively in directions substantially parallel to an axial direction of the roller cylinder; and a driving mechanism, which is connected to the base and rotates the base to multiple position states. An image forming apparatus using the heating roller is also disclosed.