Static Charge Elimination Control for Humidity-Variable Printing
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Solution Overview
Problem
Static electricity on sheets during printing causes sheets to stick together, leading to quality issues and potential device damage, and existing methods for static electricity elimination are inadequate due to variations in print environment and sheet type, requiring optimal charge adjustment values that are not consistently maintained.
Innovation Solution
A printing system with a static electricity elimination device and sensors to detect humidity and sheet conveyance path changes, adjusting the static electricity elimination settings based on detected changes to prevent inappropriate charge adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If static electricity elimination is performed using a fixed charge adjustment value, then the device complexity is reduced, but the reliability deteriorates due to environmental variations and sheet type differences
Solution Approach 1:
The patent implements dynamic adjustment of the charge adjustment value based on detected environmental conditions (humidity, temperature) and sheet characteristics. The control unit automatically modifies the static electricity elimination parameters in real-time, transitioning from a fixed-value system to a dynamic adaptive system that responds to changing conditions.
Solution Approach 2:
The patent incorporates detection units that measure environmental parameters and sheet properties, feeding this information back to the control unit. The control unit uses this feedback to automatically adjust the charge adjustment value, creating a closed-loop control system that maintains optimal static electricity elimination performance.
2Reliability
If the charge adjustment value is increased to eliminate static electricity on high-resistance sheets, then sheets with low electrical resistance may become overcharged, causing sheets to stick together
Solution Approach 1:
The patent applies different charge adjustment values tailored to specific sheet types and environmental conditions. Instead of using a uniform high charge adjustment value for all sheets, the system dynamically selects appropriate values based on the electrical resistance characteristics of the specific sheet being processed, ensuring optimal neutralization without overcharging.
Solution Approach 2:
The patent dynamically changes the charge adjustment parameter based on detected sheet electrical resistance and environmental conditions. The control unit modifies the voltage or charge amount applied to each sheet according to its specific properties, preventing both insufficient neutralization and overcharging that would cause sticking.
3Object-generated harmful factors
If the charge adjustment value is decreased for low-resistance sheets, then sheets with high electrical resistance will not have sufficient static electricity eliminated, causing sheets to stick together
Solution Approach 1:
The system dynamically adjusts the charge adjustment value upward when high-resistance sheets are detected, ensuring sufficient static electricity elimination. The control unit monitors sheet properties in real-time and modifies the charge parameters to match the specific electrical characteristics of each sheet type being processed.
Solution Approach 2:
The patent changes the charge adjustment parameter based on the electrical resistance of the sheet being processed. When high-resistance sheets are detected, the system increases the charge adjustment value to ensure complete static electricity elimination, while lowering it for low-resistance sheets to prevent overcharging.
4Manufacturing precision
If manual adjustment of charge adjustment value is required for each environment change, then the manufacturing precision is improved, but the ease of operation deteriorates
Solution Approach 1:
The patent implements a self-adjusting system where the control unit automatically detects environmental conditions and sheet properties, then autonomously modifies the charge adjustment value without requiring manual intervention. The system serves itself by using built-in detection units to trigger appropriate parameter changes.
Solution Approach 2:
The system uses feedback from detection units that continuously monitor environmental parameters and sheet characteristics, automatically adjusting the charge adjustment value in response to detected changes. This closed-loop control eliminates the need for manual adjustment while maintaining precise charge control.
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 sheets from sticking together by dynamically adjusting static electricity elimination settings, reducing waste and maintaining print quality by ensuring appropriate charge neutralization.
Implementation Method 1
a component (hereinafter, referred to as 'static electricity elimination roller') that applies the voltage to the conveyance rollers cancels static electricity by applying a charge opposite to a charge on a sheet to the sheet via the static electricity elimination roller
Implementation Method 2
a sensor configured to detect humidity
Data Source
AI summary
There is provided a system for performing static electricity elimination properly in a case where there is a change in humidity. A method for controlling a printing system includes printing an image on a sheet, performing static electricity elimination on the sheet with the image printed on the sheet, detecting humidity, and notifying a user to change a setting value of the static electricity elimination in a case where the detected humidity has changed.