Electrostatic Adsorption Belt Resistivity Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The stability of the attractive force for conveying a recording medium in medium convey devices is unstable due to varying volume resistivity and moisture absorbency of the recording medium, affecting the current generated and thus the adsorption process.
Innovation Solution
A medium convey apparatus with an endless belt and surface layer member using a resin material containing an ion conductive resistivity control material, with specific voltage applied to electrodes to stabilize the attractive force, ensuring consistent conveyance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional electrode plate and earth plate configuration is used to attract the recording medium, then the adsorption mechanism is simple, but the attractive force becomes unstable due to varying volume resistivity and moisture absorbency of different recording media
Solution Approach 1:
The patent changes the electrical parameter (volume resistivity) of the adsorption mechanism components. The endless belt is made of a resin material with a specific volume resistivity range (10^9 to 10^14 Ω·cm), and ion conductive resistivity control material is added to these components. This parameter adjustment stabilizes the current flow through the recording medium regardless of its varying resistivity, thereby stabilizing the attractive force generated by the electrostatic adsorption mechanism.
Solution Approach 2:
The patent uses composite materials in the adsorption mechanism. The endless belt and surface layer members are made of resin materials containing ion conductive resistivity control material. This composite structure combines the insulating properties of resin with the ion conductive properties of the control material, creating a material that can stabilize current flow while maintaining the necessary electrostatic properties for adsorption.
2Reliability
If the volume resistivity of the resin material is too low (high conductivity), then current flow is stable, but the electrostatic adsorption capability decreases
Solution Approach 1:
The patent identifies and controls the critical parameter of volume resistivity within a specific range (10^9 to 10^14 Ω·cm). This parameter optimization balances two competing requirements: low enough to allow stable current flow for electrostatic generation, but high enough to maintain electrostatic charge and adsorption capability. The ion conductive resistivity control material enables precise adjustment within this optimal range.
3Force
If the volume resistivity of the resin material is too high (low conductivity), then electrostatic adsorption capability is maintained, but current flow becomes unstable
Solution Approach 1:
The patent uses composite materials in the adsorption mechanism. The endless belt and surface layer members are made of resin materials containing ion conductive resistivity control material. This composite structure combines the insulating properties of resin with the ion conductive properties of the control material, creating a material that can stabilize current flow while maintaining the necessary electrostatic properties for adsorption.
4Adaptability or versatility
If different types of recording media are used with varying moisture absorbency, then the system becomes versatile, but the attractive force becomes unstable due to current variation
Solution Approach 1:
The patent changes the electrical parameter (volume resistivity) of the adsorption mechanism components. The endless belt is made of a resin material with a specific volume resistivity range (10^9 to 10^14 Ω·cm), and ion conductive resistivity control material is added to these components. This parameter adjustment stabilizes the current flow through the recording medium regardless of its varying resistivity, thereby stabilizing the attractive force generated by the electrostatic adsorption mechanism.
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 provides a stable attractive force for conveying recording media, reducing fluctuations in current and adsorption, ensuring reliable and consistent conveyance of the medium.
Implementation Method 1
an attract member using electrostatic action as described above, an attractive force of the recording medium depends upon a current generated in a path extending from the first electrode to the second electrode via the endless belt and the recording medium
Implementation Method 2
a volume resistivity of the resin material ranges from 10^10 to 10^14 Ω·cm when the specific voltage is applied in an environment at a temperature of 22.5° C. and a relative humidity of 50%
Data Source
AI summary
A medium convey apparatus including: a convey mechanism including an endless belt having a medium-placed face; and a first adsorbing mechanism which includes first and second electrodes each facing a face of the convey mechanism opposite to the medium-placed face, and which adsorbs a recording medium to the medium-placed face by applying a specific voltage to between the first and second electrodes; wherein a surface layer member covers the first and second electrodes; and wherein at least one of the endless belt and the surface layer member has at least an area facing the first and second electrodes, wherein the area is formed of a resin material containing an ion conductive resistivity control material, and wherein a volume resistivity of the resin material ranges from 1010 to 1014 Ω·cm when the specific voltage is applied in an environment at a temperature of 22.5° C. and a relative humidity of 50%.