Charge-Removal Voltage Adjustment for Deviated Toner Placement
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Solution Overview
Problem
Existing charge removing methods in printing systems fail to account for variations in toner use amount and placement, leading to unsuitable application voltage settings that can cause electrostatic adhesion of sheets, especially in double-side printing and when toner placement is deviated.
Innovation Solution
A system that includes a printing apparatus and a charge removing apparatus, with a control unit to adjust application voltage based on toner use amount and placement, and a display unit to prompt users for voltage adjustment when deviations are detected, ensuring optimal charge removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the same application voltage value is set based on toner use amount and area, then charge removal is optimized for uniform toner distribution, but electrostatic adhesion occurs when toner placement is deviated
Solution Approach 1:
The patent applies dynamics by making the application voltage adjustable and adaptable rather than fixed. The system dynamically adjusts the application voltage value based on detected toner placement deviation, transforming a static voltage setting into a dynamic one that responds to actual printing conditions, thereby resolving the contradiction between optimized charge removal and adaptability to varying toner placement
Solution Approach 2:
The patent implements feedback by detecting toner placement deviation and using this information to adjust the application voltage value. The detection unit monitors toner placement, and when deviation is detected, the system feeds back this information to modify the voltage setting, creating a closed-loop control system that ensures reliable charge removal across different printing scenarios
2Ease of operation
If charge removing control is performed without considering toner use amount and placement, then the system is simple to operate, but sheets adhere due to insufficient charge removal
Solution Approach 1:
The patent applies self-service by enabling the system to automatically detect toner placement deviation and adjust the application voltage without requiring manual intervention. The detection unit and control mechanism work autonomously to optimize charge removal, maintaining simplicity of operation while ensuring reliable charge removal effectiveness through automated adaptation to printing conditions
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
Prevents electrostatic adhesion by dynamically adjusting the application voltage according to toner use and placement, maintaining sheet alignment and print quality in post-processing.
Implementation Method 1
charges opposite to charges on the sheet are applied to the sheet via the charge removing roller to eliminate the static electricity
Data Source
AI summary
A method of controlling a system, the system including a printing apparatus configured to print an image on a sheet, and a charge removing apparatus configured to perform charge removing processing on the sheet on which the image is printed, includes controlling an application voltage of the charge removing processing based on a use amount of a recording material for one page of the image, determining whether a recording material placed region in the one page is deviated, and displaying, in a case where the recording material placed region in the one page is deviated, a screen for prompting a user to select whether to adjust the application voltage of the charge removing processing, on an operation unit.