Primary Transfer Voltage Control After Intermediate Transferor Replacement
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Solution Overview
Problem
Existing image forming apparatuses face challenges in efficiently adjusting primary transfer voltage and image density after replacing the intermediate transferor, leading to inconsistent image quality and potential wear of components due to environmental changes.
Innovation Solution
The apparatus includes a primary transfer electric current detector and a controller that determines the primary transfer voltage based on detected electric current values, adjusting the voltage when the intermediate transferor is replaced and performing image density adjustments to stabilize image quality and extend component life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the primary transfer voltage is determined based on electric current values without considering intermediate transferor replacement, then the control process is simple, but the image quality becomes inconsistent and component wear increases
Solution Approach 1:
The controller performs preliminary actions by automatically detecting intermediate transferor replacement through the control-input device and executing initial image density adjustment before normal operation resumes. This preliminary detection and adjustment prevent image quality degradation from occurring in the first place, resolving the contradiction between simple control and consistent image quality.
Solution Approach 2:
The system implements feedback by continuously monitoring electric current values from the primary transferor and using this information to adjust the primary transfer voltage. When intermediate transferor replacement is detected, the feedback mechanism triggers a reset of the counter value and initiates image density adjustment, ensuring consistent image quality while maintaining a relatively simple control structure.
2Measurement precision
If the counter value is not reset after intermediate transferor replacement, then the control logic is simple, but the primary transfer voltage determination becomes inaccurate
Solution Approach 1:
The controller performs preliminary detection of intermediate transferor replacement through the control-input device and automatically resets the counter value before proceeding with normal operation. This preliminary reset action ensures that the counter value accurately reflects the new intermediate transferor's usage, improving measurement precision without requiring complex conditional logic throughout the control process.
Solution Approach 2:
The system performs self-service by automatically detecting intermediate transferor replacement and resetting the counter value without requiring manual intervention or complex external control. The controller monitors the control-input device, detects the replacement event, and autonomously resets the counter, improving accuracy while keeping the control logic relatively simple.
3Reliability
If image density adjustment is not performed after intermediate transferor replacement, then the operational flow is simple, but image quality deteriorates due to environmental changes
Solution Approach 1:
The controller performs preliminary image density adjustment after detecting intermediate transferor replacement before normal printing operations begin. This preliminary action stabilizes the image density to prevent deterioration from environmental changes, and by executing it as part of the replacement protocol, the system maintains operational efficiency without requiring continuous adjustments during normal operation.
Solution Approach 2:
The system maintains continuity of useful action by integrating image density adjustment into the standard replacement procedure. Rather than requiring separate, interruptive adjustments during operation, the controller continuously monitors for replacement events and performs adjustment as part of the natural workflow, ensuring image density stability while minimizing impact on 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 ensures consistent image quality and extends the life of the intermediate transferor and photoconductors by stabilizing the primary transfer voltage and adjusting image density, reducing wear and improving operational efficiency.
Implementation Method 1
a primary transferor (11) to be applied with a primary transfer voltage... primarily transfers a toner image formed on an image bearer (1) onto an intermediate transferor (3)
Implementation Method 2
A primary transfer electric current detector detects an electric current value of an electric current supplied to the primary transferor
Data Source
AI summary
An image forming apparatus includes an image bearer and a primary transferor to be applied with a primary transfer voltage. The primary transferor is disposed opposite the image bearer via an intermediate transferor to form a primary transfer portion where the primary transferor transfers a toner image formed on the image bearer onto the intermediate transferor. A primary transfer electric current detector detects an electric current value of an electric current supplied to the primary transferor. A control-input device receives intermediate transferor replacement data that indicates that the intermediate transferor is replaced. A controller performs a primary transfer voltage determination control that determines the primary transfer voltage based on the detected electric current value and performs the primary transfer voltage determination control at a time when the control-input device receives the intermediate transferor replacement data and a time after an initial image formation after the intermediate transferor is replaced.