Transfer Current Correction for Image Transfer Interference
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Solution Overview
Problem
Current interference occurs between transfer units in a transfer device due to current flowing from the primary transfer unit to the secondary transfer unit, leading to potential transfer failures during image transfer onto an image recording medium.
Innovation Solution
An information processing system that calculates a correction coefficient based on voltage measurements of the primary and secondary transfer units and adjusts the transfer timing current using this coefficient to minimize current interference.
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 harmful current flow path by introducing a grounded portion that selectively grounds the intermediate transfer belt at specific positions. This removes the unwanted current interference between transfer units while maintaining the necessary electrical connections for image transfer, thus preventing current interference without requiring complete structural redesign.
Solution Approach 2:
The grounded portion acts as an intermediary element between the primary and secondary transfer units. It provides a controlled grounding path through the intermediate transfer belt, mediating the electrical interaction between the two transfer units and preventing direct current interference while allowing indirect electrical connection for normal operation.
2Reliability
If transfer timing primary current is adjusted using correction coefficient, then current interference is reduced, but measurement precision requirements increase
Solution Approach 1:
The patent implements a feedback mechanism where voltage measurement values from the primary transfer unit are used to calculate a correction coefficient. This coefficient then feeds back to adjust the transfer timing primary current, creating a closed-loop control system that automatically compensates for current interference based on actual measured conditions.
Solution Approach 2:
The system dynamically changes the transfer timing primary current parameter based on calculated correction coefficients. By adjusting this electrical parameter according to measured voltage conditions, the system optimizes current flow to reduce interference while adapting to varying operational conditions without requiring ultra-precise fixed measurements.
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 effectively reduces current interference between transfer units, ensuring stable and reliable image transfer operations.
Implementation Method 1
a primary transfer unit 33 and a secondary transfer unit 34 that transfer toner images onto an intermediate transfer belt 31 and an image recording medium, respectively
Data Source
AI summary
An information processing system includes at least one processor configured to: calculate a correction coefficient based on a voltage measurement value of a primary transfer unit in a first state in which voltages of same polarity are applied to the primary transfer unit and a secondary transfer unit in contact with an intermediate transfer belt of an image forming apparatus, 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.