Contact Process Cartridge Rectifier for Jumping Development
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Solution Overview
Problem
Current process cartridges for electrophotographic technology are limited by their specific development methods, requiring different bias voltages for contact and jumping development, making them printer-specific and increasing manufacturing costs due to high accuracy requirements for gap maintenance between the photosensitive drum and developer roller.
Innovation Solution
A contact process cartridge design that includes a rectifier to convert alternating current bias voltage into direct current bias voltage, allowing the cartridge to be used in printers with jumping development methods, eliminating the need for precise gap maintenance between the photosensitive drum and developer roller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a contact process cartridge is designed with direct current bias voltage for contact development method, then the development efficiency is improved, but the cartridge cannot be used in jumping development printers
Solution Approach 1:
The patent applies parameter changes by incorporating a rectifier that converts alternating current bias voltage into direct current bias voltage. This allows the contact process cartridge to receive the appropriate voltage type for contact development while maintaining compatibility with jumping development printers that supply alternating current voltage. The rectifier transforms the electrical parameter to enable universal compatibility.
2Productivity
If a non-contact process cartridge is designed with alternating current bias voltage for jumping development method, then the development mechanism is optimized, but the cartridge cannot be used in contact development printers
Solution Approach 1:
The rectifier component changes the electrical parameter from alternating current to direct current, enabling the contact process cartridge to function in contact development printers while maintaining its original design advantages.
3Manufacturing precision
If the gap between photosensitive drum and developer roller is maintained with high precision in non-contact development, then the printing quality is improved, but the manufacturing cost increases
Solution Approach 1:
The patent replaces the mechanical gap maintenance system with an electrical field-based contact development mechanism. By using direct current bias voltage to drive developer transfer through electrical attraction, the system eliminates the need for precise mechanical gap control, thereby reducing manufacturing precision requirements and associated costs.
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
This solution reduces manufacturing costs and improves printing quality by enabling the use of contact process cartridges in jumping development printers without requiring precise gap accuracy, enhancing versatility and efficiency.
Implementation Method 1
a rectifier for converting an alternating current bias voltage into a direct current bias voltage
Implementation Method 2
A developer is moved from the developer roller to the photosensitive drum through voltage difference between the photosensitive drum and the developer roller
Implementation Method 3
it is carried by a doping vehicle and absorbed on the outer surface of the magnetic roller component 4′ by the permanent core of the magnetic roller component 4′
Data Source
AI summary
A process cartridge used in an image forming apparatus, the process cartridge having a photosensitive drum, a developer roller, a conductive electrode and a rectifier. The photosensitive drum and the developer roller are contacted with each other. The conductive electrode is contacted with a power supply electrode in the image forming apparatus to receive a developing bias. The rectifier converts an alternating current bias voltage into a direct current bias voltage. The rectifier is electrically connected between the conductive electrode and the developer roller. A rectifier converting an alternating current bias voltage into a direct current bias voltage is added into a contact process cartridge in the present invention. Therefore, the contact process cartridge can be applied to a printer using a jumping development method.