Toner Cartridge Shutter with Biasing Mechanism
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Solution Overview
Problem
Toner cartridges lack an effective mechanism to control toner movement, leading to potential leaks and print defects during installation and removal, which can also result in toner contact with users or workstations, and existing solutions may increase the cartridge's cost.
Innovation Solution
A toner cartridge design featuring a shutter mechanism with a biasing system that rotates between open and closed orientations to control toner flow, preventing leaks and ensuring safe installation and removal, while maintaining cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a shutter mechanism is added to control toner movement, then toner leak prevention is improved, but device complexity increases
Solution Approach 1:
The shutter is designed as a movable component that dynamically transitions between open and closed positions based on cartridge insertion/removal states. The biasing mechanism provides automatic dynamic adjustment without requiring complex control systems, resolving the contradiction by implementing simplicity through dynamic mechanical behavior rather than static complex structures.
Solution Approach 2:
The biasing mechanism automatically urges the shutter to the closed position without external intervention, and the cartridge insertion/removal process itself actuates the shutter through cam engagement. This self-service operation eliminates the need for additional motors, sensors, or control circuits, maintaining cost-effectiveness while providing reliable toner containment.
2Reliability
If a biasing mechanism is added to urge the shutter closed, then toner containment is improved, but manufacturing cost increases
Solution Approach 1:
The biasing mechanism uses simple, inexpensive mechanical elements such as springs or elastic components that can be manufactured at low cost. These components are designed to be disposable along with the cartridge, eliminating the need for expensive durable materials or complex assembly processes, thereby maintaining cost-effectiveness while ensuring reliable toner containment.
Solution Approach 2:
The biasing function is extracted as a separate, simple mechanical subsystem that can be independently manufactured and assembled. This modular approach allows for cost-effective production using standard manufacturing techniques for spring elements or elastic components, avoiding the need for integrated complex mechanisms that would increase overall manufacturing cost.
3Ease of operation
If the shutter is designed to rotate between open and closed orientations, then toner flow control is improved, but device complexity increases
Solution Approach 1:
The shutter mechanism is segmented into distinct functional components: the shutter blade itself, the biasing mechanism, and the cam actuation element. This segmentation allows each component to be optimized independently for simplicity, using basic mechanical shapes and standard manufacturing processes, thereby reducing overall device complexity while maintaining effective toner flow control through the rotation motion.
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 shutter mechanism effectively prevents toner leaks during cartridge insertion and removal, ensuring print quality and user safety without increasing the cartridge's overall cost.
Implementation Method 1
A biasing mechanism may be operatively connected to the shutter. The biasing mechanism may urge the shutter towards one of a closed orientation to prevent toner from moving through the outlet
Data Source
AI summary
The present application is directed to cartridges for use with an image forming device. The cartridge includes a body with an interior reservoir sized to contain toner, and an outlet to move the toner to the image forming device. A shutter is rotatably connected to the body and movable between a closed orientation to prevent toner from passing from the cartridge and into the image forming device, and an open orientation to allow toner to pass. A biasing mechanism is operatively connected to the shutter and the body of the cartridge. The biasing mechanism urges the shutter towards one of the open and closed orientations.