Sheet Charge Elimination Control Using Voltage and Conveyance Speed
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional charge eliminating apparatuses fail to adequately adjust or eliminate charge on sheets due to insufficient charge elimination bias adjustment based on sheet properties, leading to conveyance and stacking failures.
Innovation Solution
A charge eliminating apparatus that controls both the applied voltage and conveyance speed of a charge eliminating member based on a set charge elimination amount, using a contact-type and noncontact-type charge eliminating units to enhance charge elimination effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If only voltage adjustment is used for charge elimination, then the control mechanism is simple, but the charge elimination amount is insufficient for sheets with high charge requirements
Solution Approach 1:
The patent changes multiple parameters simultaneously - both voltage magnitude and sheet conveyance speed - to achieve effective charge elimination. The control unit adjusts voltage based on sheet resistance and modifies conveyance speed to optimize the interaction time between the charge eliminating member and the sheet, thereby achieving reliable charge elimination for various sheet types.
Solution Approach 2:
The system dynamically adjusts both voltage and conveyance speed based on real-time sheet properties. The control unit modifies operational parameters adaptively, making the charge elimination process dynamic rather than static, which improves effectiveness across different sheet conditions.
2Productivity
If conveyance speed is increased to improve productivity, then output increases, but charge elimination effectiveness decreases
Solution Approach 1:
The system coordinates changes in both conveyance speed and voltage magnitude. When productivity needs to be increased, the control unit increases conveyance speed while simultaneously adjusting voltage to maintain adequate charge elimination, rather than treating these parameters independently.
Solution Approach 2:
The charge elimination process maintains continuous effective action by ensuring that even at higher conveyance speeds, the voltage application and sheet interaction remain sufficient to achieve the desired charge elimination level throughout the entire sheet.
3Reliability
If high voltage is applied to eliminate charge quickly, then charge elimination amount increases, but the risk of electrostatic damage to the sheet or apparatus increases
Solution Approach 1:
The patent uses graduated parameter adjustment where voltage magnitude and conveyance speed are modified in coordinated steps based on sheet resistance measurements. This allows achieving effective charge elimination through optimized parameter combinations rather than simply applying maximum voltage, thereby reducing electrostatic damage risk.
Solution Approach 2:
The control unit receives feedback from sheet resistance measurements and adjusts voltage and conveyance speed accordingly. This feedback mechanism prevents excessive voltage application by tailoring the charge elimination parameters to the actual sheet conditions, reducing the risk of electrostatic damage.
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 apparatus effectively increases charge elimination and adjustment amounts, reducing electrostatic conveyance and stacking failures by optimizing voltage and speed settings.
Implementation Method 1
a charge eliminating member configured to eliminate charge of the sheet conveyed by the conveying unit
Implementation Method 2
a conveying unit configured to convey a sheet
Data Source
AI summary
A charge eliminating apparatus includes a conveying unit configured to convey a sheet, a charge eliminating member configured to eliminate charge of the sheet conveyed by the conveying unit, a setting unit configured to set a charge elimination amount by the charge eliminating member, and a controller configured to control both a voltage applied to the charge eliminating member and a sheet conveyance speed of the conveying unit based on the charge elimination amount set by the setting unit.