Optical Scanner Cleaning Timing Control for Image Forming Apparatus
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Image forming apparatuses using the electrophotographic method face usability issues when regular cleaning processing is executed, as it suspends ongoing image forming jobs, leading to increased wait times for users, especially when multiple jobs are consecutive.
Innovation Solution
An image forming apparatus with a cleaning mechanism that cleans the transparent members of the optical scanning device after the completion of an input image forming job, based on a cumulative count of image-formed sheets, allowing continuous operation without suspending jobs for cleaning unless necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If regular cleaning processing is executed by suspending image forming jobs, then cleaning effectiveness is improved, but usability deteriorates due to increased wait times
Solution Approach 1:
The control unit determines in advance whether cleaning is necessary by checking the cumulative sheet count against a reference value before suspending jobs. This preliminary assessment allows the system to prepare for cleaning operations proactively, ensuring that cleaning is only suspended when truly necessary, thereby maintaining usability while ensuring cleaning effectiveness when needed.
Solution Approach 2:
The system continuously monitors the cumulative number of image-formed sheets and compares it with the reference cleaning threshold. This feedback mechanism enables dynamic decision-making about when to suspend jobs for cleaning, optimizing the balance between maintaining clean transparent members and minimizing disruption to image forming operations.
2Ease of operation
If cleaning is performed during image forming jobs, then usability is improved, but image quality deteriorates due to potential contamination
Solution Approach 1:
The system performs preliminary assessment of cleaning necessity based on cumulative sheet count before allowing image forming to continue. This ensures that cleaning is postponed only when the transparent members are still clean enough, preventing image quality deterioration while allowing usability to be maintained during low-risk periods.
Solution Approach 2:
The control unit acts as an intermediary that mediates between the cleaning mechanism and the image forming unit. It monitors the cumulative sheet count and makes intelligent decisions about when to prioritize cleaning versus when to allow image forming to continue, thereby balancing image quality requirements with usability considerations.
3Manufacturing precision
If cleaning threshold is set low, then cleaning frequency is increased improving transparency, but productivity decreases due to more suspensions
Solution Approach 1:
The system dynamically adjusts the effective cleaning threshold based on the current image forming state. When no jobs are suspended, the system allows cumulative sheet count to reach higher values before triggering cleaning, thereby reducing cleaning frequency and maintaining productivity. The parameter changes are made intelligently based on operational context.
Solution Approach 2:
The cleaning decision threshold is not fixed but dynamic, adapting to the current operational state. The control unit monitors both the cumulative sheet count and the current job execution state, making flexible decisions about when to trigger cleaning. This dynamic approach optimizes the balance between maintaining transparency quality and preserving image forming productivity.
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 enhances usability by minimizing wait times for users and preventing downtime due to cleaning operations, ensuring uninterrupted image formation even when the cumulative sheet count reaches the cleaning threshold.
Implementation Method 1
a transparent member configured to allow transmission of laser light, for scanning the photosensitive member, through the transparent member to outside of the optical scanning device
Implementation Method 2
a cleaning mechanism configured to clean the transparent member
Data Source
AI summary
An image forming apparatus configured to control the timing of the next cleaning such that, if there is a plurality of image forming jobs and a cumulative number of image-formed recording media is equal to or greater than a set number of sheets for cleaning, an image forming apparatus executes cleaning processing when the plurality of image forming jobs is completed.