Transfer Current Correction for Intermediate Belt Image Transfer
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Solution Overview
Problem
Current interference occurs between transfer units in a transfer device due to current flowing from a primary transfer unit to a secondary transfer unit via an intermediate transfer belt during image transfer, leading to potential transfer failures.
Innovation Solution
An information processing system that calculates a correction coefficient based on voltage measurements of transfer units with same and opposite polarities to adjust the transfer timing current, ensuring equal voltages are applied to minimize current interference and improve transfer accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a grounded portion is connected between primary transfer unit and secondary transfer unit to prevent current interference, then current interference is prevented, but device complexity increases
Solution Approach 1:
The patent extracts the grounded portion from the physical structure and replaces it with a computational approach. Instead of physically grounding the intermediate transfer belt, the system calculates a correction coefficient based on voltage measurements and uses this coefficient to adjust the primary transfer voltage, thereby eliminating the need for physical grounding structures while preventing current interference
Solution Approach 2:
The patent replaces the mechanical/electrical grounding system with an information processing system. Voltage measurement values are acquired, a correction coefficient is calculated through information processing, and the primary transfer voltage is adjusted based on this coefficient, substituting physical grounding with computational correction
2Manufacturing precision
If transfer timing primary current is increased to improve transfer accuracy, then transfer accuracy is improved, but current interference to secondary transfer unit increases
Solution Approach 1:
The patent implements a feedback mechanism where voltage measurement values from the primary transfer unit are continuously acquired, a correction coefficient is calculated based on these measurements, and the primary transfer voltage is adjusted accordingly. This closed-loop feedback system optimizes transfer accuracy while preventing excessive current that would cause interference
Solution Approach 2:
The patent dynamically changes the voltage parameter of the primary transfer unit based on calculated correction coefficients. Instead of using a fixed high current, the system adjusts the voltage parameter in real-time based on measured conditions, achieving accurate transfer while minimizing harmful current interference
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 system enhances the accuracy of the correction coefficient, reduces the need for secondary transfer unit cleaning, and prevents current interference, thereby ensuring reliable image transfer.
Implementation Method 1
a primary transfer unit and a secondary transfer unit that transfer toner images onto an intermediate transfer belt and an image recording medium, respectively
Data Source
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AI summary
An information processing system (80) includes at least one processor (11) configured to: calculate a correction coefficient based on a voltage measurement value of a primary transfer unit (33) in a first state in which voltages of same polarity are applied to the primary transfer unit and a secondary transfer unit (34) in contact with an intermediate transfer belt (31) of an image forming apparatus (80A), and a voltage measurement value of the primary transfer unit in a second state in which voltages of opposite polarities are applied to the primary transfer unit and the secondary transfer unit, with a setting to make a same current as in the first state flow through the primary transfer unit; and adjust, using the correction coefficient, a transfer timing primary current to flow through the primary transfer unit when an image is transferred to an image recording medium (P).