Sheet Charge Elimination Control for Static-Free Printing
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Solution Overview
Problem
Static electricity on sheets during printing can cause sheets to stick together, leading to degraded print quality and paper jams, especially with different paper types and environmental conditions, and existing charge elimination methods are inadequate for varying sheet types and environments.
Innovation Solution
A printing system that includes a charge elimination apparatus and a control unit to acquire and apply charge elimination settings based on sheet type, using a charge elimination roller and ionizer to neutralize static charge effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed charge elimination voltage is applied to the charge elimination roller, then the structure is simple, but charge elimination effectiveness varies across different sheet types and humidity conditions
Solution Approach 1:
The charge elimination roller's voltage is made dynamically adjustable based on detected sheet types and environmental humidity conditions. The control unit modifies the roller's charge elimination characteristics in real-time to match different paper properties, transforming a static system into an adaptive one that maintains optimal performance across varying conditions.
Solution Approach 2:
The system changes the electrical parameters (voltage, charge elimination strength) of the charge elimination roller according to detected sheet type and humidity levels. By adjusting these parameters dynamically, the system achieves effective charge elimination for different sheet types without requiring multiple physical rollers or complex hardware modifications.
2Reliability
If charge elimination control is adjusted for each sheet type, then charge elimination effectiveness is optimized, but the control complexity increases
Solution Approach 1:
The system incorporates a detection unit that identifies sheet types and measures humidity conditions, providing feedback to the control unit. This feedback loop enables the control unit to automatically select appropriate charge elimination parameters for each sheet type, ensuring reliable charge elimination while reducing manual intervention and control complexity through automation.
Solution Approach 2:
The system performs self-adjustment by automatically detecting sheet types and environmental conditions, then autonomously configuring the charge elimination roller parameters accordingly. This self-service capability eliminates the need for manual programming of sheet-type-specific parameters, reducing operational complexity while maintaining high reliability across different paper types.
3Manufacturing precision
If synthetic paper and coated paper are used, then printing quality is improved, but static electricity accumulation increases due to high electrical resistance
Solution Approach 1:
The system applies a preliminary counteracting electric charge to synthetic and coated papers before they undergo printing and post-processing operations. By pre-charging the paper with opposite polarity charge, the system prevents subsequent static electricity accumulation and sticking issues, allowing these specialized papers to be used without compromising printing quality or causing mechanical problems.
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 for various sheet types, preventing sheet sticking and jams, thereby maintaining print quality and apparatus reliability.
Implementation Method 1
applying an electric charge of the polarity opposite to that of an electric charge on a sheet to the sheet via the charge elimination roller to eliminate the static electricity
Implementation Method 2
a charge elimination apparatus 200-3a, which includes a charge elimination roller 322 and an ionizer 323
Data Source
AI summary
A method for performing printing while changing a charge elimination setting value for each sheet type subject to printing is disclosed. A method for controlling a printing system includes printing an image on a sheet, acquiring a charge elimination setting value corresponding to a type of the sheet, and performing control to perform charge elimination on the sheet based on the charge elimination setting value.