Image Forming Apparatus High-Chroma Mode Load Tracking
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Solution Overview
Problem
High-chroma printing in electrophotographic image forming apparatuses imposes heavier loads on components, leading to issues like sheet wrapping around the fixing device, toner contamination, and reduced component lifespan, necessitating a method to accurately assess these loads.
Innovation Solution
The implementation of an image forming apparatus with a printer engine that operates in two modes: a normal mode and a high-chroma mode, where the number of image formations in the high-chroma mode is specifically counted to monitor the increased loads, and the rotation speeds and toner usage are adjusted to manage these loads effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high-chroma printing is implemented to improve image chroma, then image quality is improved, but component lifespan is reduced
Solution Approach 1:
The patent segments the printing operations into two distinct modes: normal printing mode and high-chroma printing mode. This segmentation allows the system to track and manage the different loads imposed on components by each mode separately, enabling better prediction of component lifespan based on the cumulative effect of high-chroma printing operations.
Solution Approach 2:
The patent changes the operational parameters of the image forming apparatus by adjusting the circumferential-surface speed ratio of the developing roller to the photosensitive drum. This parameter change enables high-chroma printing by increasing toner supply, while the system simultaneously tracks these parameter changes to assess component wear and predict replacement timing.
2Manufacturing precision
If high-chroma printing is implemented to improve image chroma, then image quality is improved, but toner contamination increases
Solution Approach 1:
The patent implements a feedback mechanism that tracks the cumulative number of high-chroma printing operations and uses this information to predict when components will become contaminated or fail. This feedback allows the system to provide advance warning to users about toner contamination risks and component replacement needs.
Solution Approach 2:
The patent performs preliminary assessment of component lifespan by tracking high-chroma printing usage before actual contamination or failure occurs. This allows users to take preventive actions, such as replacing components or adjusting printing habits, before toner contamination becomes a serious problem.
3Manufacturing precision
If high-chroma printing is implemented to improve image chroma, then image quality is improved, but sheet wrapping around fixing device occurs
Solution Approach 1:
The patent segments the printing operations into normal and high-chroma modes, allowing separate tracking of the thermal and mechanical loads imposed on the fixing device by each mode. This segmentation enables more accurate prediction of sheet wrapping issues based on cumulative high-chroma printing usage.
4Manufacturing precision
If high-chroma printing is implemented to improve image chroma, then image quality is improved, but replacement timing prediction becomes difficult
Solution Approach 1:
The patent segments printing operations into normal and high-chroma modes and maintains separate counters for each mode. This segmentation transforms the difficult problem of predicting component replacement timing into a manageable calculation based on the cumulative number of high-chroma printing operations, providing clear guidance for maintenance scheduling.
Solution Approach 2:
The patent replaces complex mechanical wear assessment with a computational approach that uses software to track high-chroma printing operations and predict component lifespan. This substitution of mechanical assessment with digital tracking and calculation simplifies the prediction process and provides more accurate replacement timing information.
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 allows for proper grasping and management of the loads imposed by high-chroma printing, extending component lifespan and preventing issues like sheet wrapping and toner contamination by accurately tracking high-chroma printing usage.
Implementation Method 1
forming an electrostatic latent image on a photosensitive drum
Implementation Method 2
developing the electrostatic latent image by applying toner onto the photosensitive drum using a developing device
Implementation Method 3
transferring the toner from the photosensitive drum onto a recording sheet
Implementation Method 4
a heating rotary body to support and convey a sheet with a toner image formed thereon
Data Source
AI summary
An image forming apparatus that is capable of properly grasping a load that is imposed on the image forming apparatus by performing high-chroma printing. The image forming apparatus includes a printer engine that causes a heating rotary body to support and convey a sheet with a toner image formed thereon and performs an image formation on the sheet. The printer engine is controlled to perform the image formation on sheets in a first mode in which a toner image based on a piece of image data is formed with a first amount of toner, or a second mode in which a toner image based on the piece of image data is formed with a second amount of toner larger than the first amount of toner. A count function for counting the number of times of the image formation performed in the second mode, rather than the first mode, is performed.