Printing System Charge Measurement for Sheet Feeding Reliability
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Solution Overview
Problem
Existing printing systems fail to effectively adjust charge elimination settings based on the printing environment and sheet type, leading to insufficient or excessive charge neutralization, which can degrade print quality and cause sheet feeding failures.
Innovation Solution
A printing system with a measurement unit to assess charge levels on sheets post-processing and a display unit to prompt users to adjust charge elimination settings if the measured charge does not fall within predetermined ranges, ensuring appropriate charge neutralization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a voltage is applied to a conveying roller to eliminate charge on sheets, then charge elimination is achieved, but the user cannot determine whether sufficient charge elimination has been accomplished
Solution Approach 1:
The patent applies feedback by measuring the charge amount on sheets after charge elimination and providing this information back to the user through display units. The measurement unit quantifies residual charge, and the display unit presents this data along with evaluation results (sufficient/insufficient elimination), enabling users to verify charge elimination effectiveness and adjust settings accordingly.
2Adaptability or versatility
If fixed charge elimination settings are used, then the system is simple to operate, but charge elimination is insufficient for different sheet types and environmental conditions
Solution Approach 1:
The patent implements dynamics by enabling adjustable charge elimination settings that can be modified based on sheet type and environmental conditions. The system transitions from fixed to dynamic control, allowing users to optimize charge elimination parameters (such as voltage magnitude) according to specific printing conditions, thereby achieving adaptability without requiring complex automated systems.
3Productivity
If charge elimination is not sufficient, then the system operates continuously, but sheet sticking occurs degrading print quality and causing feeding failures
Solution Approach 1:
The patent applies preliminary action by measuring charge amounts and evaluating charge elimination sufficiency before sheets proceed to subsequent processing steps. This preliminary assessment allows the system to identify insufficient charge elimination early, preventing sheet sticking during conveyance and post-processing operations, thereby maintaining both productivity and reliability.
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
Ensures optimal charge elimination by allowing users to adjust settings dynamically, preventing sheet sticking and improving print quality and system reliability.
Implementation Method 1
Charge elimination with a configuration in which a voltage is applied to a conveying roller (hereinafter, referred to as 'charge eliminating roller') involves giving a charge of the opposite polarity to a charge on a sheet via the charge eliminating roller to the sheet to neutralize the charge on the sheet
Implementation Method 2
a measurement unit configured to measure an amount of charge on the sheet that has undergone the charge eliminating process
Data Source
AI summary
A method of controlling a printing system including a printing apparatus that prints an image on a sheet and a charge eliminating apparatus that performs a charge eliminating process on the sheet on which the image is printed includes measuring an amount of charge on the sheet that has undergone the charge eliminating process performed by the charge eliminating apparatus, and displaying a message prompting a user to change a setting for charge elimination to be performed by the charge eliminating apparatus in a case where the amount of charge on the sheet measured in the measuring does not fall within a predetermined range.