Toner Container Airflow Filtration for Stable Discharge
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Solution Overview
Problem
Existing toner containers in electrophotographic image forming apparatuses face challenges in efficiently and stably discharging toner while managing air flow to prevent toner leakage and ensure consistent supply to the process cartridge.
Innovation Solution
A toner container design with a chamber containing toner, an air chamber with a filter, and a passage that allows air to flow in and discharge toner through a single outlet, using a pump to introduce air that fluidizes and conveys toner through a controlled passage, ensuring stable discharge and supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If air is introduced to fluidize and convey toner, then toner discharge efficiency is improved, but toner leakage risk increases
Solution Approach 1:
The patent introduces a filter as an intermediary component between the air chamber and container chamber. This filter allows air to pass through while blocking toner particles, thereby enabling efficient toner conveyance through fluidization while preventing toner leakage into the air chamber. The filter acts as a mediator that separates the functions of air flow and toner containment.
Solution Approach 2:
The toner container is divided into distinct functional chambers: a container chamber for holding toner, an air chamber for air introduction, and a filter chamber separating them. This segmentation allows independent optimization of each function - air flow for fluidization in the air chamber and toner containment in the container chamber - while maintaining efficient toner discharge through the passage.
2Adaptability or versatility
If multiple openings are provided for air and toner discharge, then discharge flexibility is improved, but toner leakage risk increases
Solution Approach 1:
The filter serves as a mandatory intermediary for any air-toner interaction. Even though multiple openings (inlet port in air chamber, outlet port in container chamber) are provided for flexible discharge, the filter ensures that toner cannot leak through the air chamber path. The passage with its openings provides discharge flexibility while the filter maintains leakage prevention.
3Reliability
If pump system is used for air ejection, then toner conveyance reliability is improved, but device complexity increases
Solution Approach 1:
The patent employs a pump system that utilizes pneumatic principles to eject air into the air chamber, which then fluidizes the toner and drives it through the passage. This pneumatic approach provides reliable toner conveyance through controlled air flow while avoiding the need for more complex mechanical conveying mechanisms such as screws, belts, or motors directly in contact with toner.
4Object-affected harmful factors
If filter is placed between air chamber and container chamber, then toner leakage prevention is improved, but air flow resistance increases
Solution Approach 1:
The filter is designed as a porous structure that allows air molecules to pass through while blocking larger toner particles. The porous configuration provides sufficient air permeability to maintain low flow resistance and enable efficient fluidization, while the pore size is small enough to effectively prevent toner leakage. This balances leakage prevention with energy efficiency.
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 design stabilizes toner discharge and supply, preventing leakage and ensuring consistent toner delivery to the process cartridge without additional suction pumps, facilitating efficient operation and reducing complexity.
Implementation Method 1
a filter configured to suppress passage of the toner and allow passage of air
Implementation Method 2
allowing air to flow into a chamber that contains the toner... a passage that is provided in the container chamber to pass the toner contained in the container chamber
Data Source
AI summary
A toner container configured to be detachably mountable to an apparatus main body includes a container chamber and is provided with an outlet port for discharging the contained toner to outside, a filter configured to prevent passage of the toner and allow passage of air, an air chamber that is provided with an inlet port for receiving the air and is adjacent to the container chamber with the filter in between, and a passage that is provided in the container chamber to pass the toner and has a first opening for receiving the toner and a second opening configured to communicate with the outlet port, the passage extending from the first opening to the second opening, wherein, the only opening through which the air flowing in from the inlet port and the toner is discharged from the container chamber is the outlet port.