Conductive Shielding Member for Ink Jet Head Dust Prevention
Solution Overview
Problem
High-speed transportation of recording sheets in ink jet printers leads to paper dust adhesion to the ink jet recording head due to electrostatic charging and dielectric polarization, causing quality issues and nozzle obstruction, with existing solutions either being costly or ineffective in maintaining long-term performance.
Innovation Solution
A conductive shielding member is placed along the edge of the recording medium to prevent paper dust adhesion by creating a conductive barrier and maintaining an equipotential state to eliminate electrostatic forces, combined with a simplified mounting structure that reduces costs and effectively prevents paper dust from reaching the recording head.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-speed transportation of recording sheets is implemented, then productivity is improved, but paper dust adhesion to the ink jet recording head increases due to electrostatic charging and dielectric polarization
Solution Approach 1:
A conductive shielding member is introduced as an intermediary component between the recording sheet and the ink jet recording head. This shielding member, made of electrically conductive material, acts as a mediator that prevents paper dust from adhering to the recording head by providing a conductive barrier that eliminates electrostatic forces would otherwise cause dust adhesion during high-speed transportation
Solution Approach 2:
The conductive shielding member is electrically connected to the recording sheet or support member to maintain an equipotential state. By ensuring that the shielding member and the recording sheet are at the same electric potential, electrostatic forces that would otherwise cause paper dust to adhere to the recording head are eliminated, allowing high-speed transportation without dust adhesion problems
2Object-affected harmful factors
If electrostatic control is applied to prevent paper dust adhesion, then harmful factors are reduced, but device complexity and cost increase due to existing solutions requiring complex electric field control systems
Solution Approach 1:
The complex electric field control system is replaced by extracting only the essential function: a simple conductive shielding member that passively prevents paper dust adhesion. This removes the need for complex active control systems while maintaining effectiveness in preventing dust adhesion during high-speed transportation
Solution Approach 2:
The invention uses a simple, inexpensive conductive shielding member that can be easily manufactured and installed. Rather than implementing a complex, expensive electric field control system, the solution employs a straightforward conductive barrier that provides effective dust prevention at minimal cost and structural complexity
3Object-affected harmful factors
If existing electric field control techniques are used, then paper dust adhesion is prevented, but manufacturing cost increases due to complex control mechanisms
Solution Approach 1:
The invention replaces expensive complex electric field control systems with a inexpensive conductive shielding member. The shielding member can be made from simple conductive materials and provides effective paper dust adhesion prevention at minimal manufacturing cost, making the solution economically viable for production
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 solution ensures reliable prevention of paper dust adhesion to the ink jet recording head, maintaining recording quality by physically and electrostatically shielding the area, and accommodating various sheet sizes with a simplified and cost-effective design.
Implementation Method 1
paper dust adhesion to the ink jet recording head due to electrostatic charging and dielectric polarization
Implementation Method 2
A conductive shielding member is placed along the edge of the recording medium to prevent paper dust adhesion by creating a conductive barrier
Implementation Method 3
maintaining an equipotential state to eliminate electrostatic forces
Implementation Method 4
physically and electrostatically shielding the area
Data Source
AI summary
A liquid ejecting apparatus having a liquid ejecting unit that ejects liquid toward a target ejection medium and a target ejection medium support member that is disposed so as to oppose the liquid ejecting unit and supports the target ejection medium, includes a conductive shielding member that covers a first side of the target ejection medium, which opposes the liquid ejecting unit, at an edge area including an edge perpendicular to a feeding direction of the target ejection medium.