Cyclonic Toner Separation for Image Forming Apparatus
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electrophotographic image forming apparatuses face challenges in efficiently conveying toner from a toner container to a developing apparatus, particularly in separating toner from air to prevent toner leakage and maintain separation performance.
Innovation Solution
The image forming apparatus incorporates a cyclonic separating portion with an intake port, a first discharge port communicating with the toner storage portion, and a second discharge port communicating with the outside, which takes in air mixed with toner, separates the toner and air, and discharges them separately, ensuring efficient toner supply and air separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter is used to discharge air containing toner, then toner leakage is reduced, but the apparatus size increases and pressure loss increases
Solution Approach 1:
The patent replaces the conventional filter-based air discharge system with a cyclonic separation system. The cyclone separator uses centrifugal force generated by swirling airflow to separate toner particles from air, eliminating the need for filters and reducing pressure loss while preventing toner leakage.
Solution Approach 2:
The patent employs a cyclonic separator that utilizes pneumatic principles to separate toner from air through centrifugal force. The intake port is positioned at a lower end portion of the conical component, and the separation chamber is formed by a conical surface, creating a cyclonic flow that effectively separates toner particles from the air stream.
2Reliability
If a filter is used to discharge air containing toner, then toner leakage is reduced, but pressure loss increases
Solution Approach 1:
The patent replaces the filter-based system with a cyclonic separation system that uses centrifugal force to separate toner from air. This substitution eliminates the pressure loss associated with filter media while maintaining effective toner leakage prevention.
Solution Approach 2:
The cyclonic separator utilizes pneumatic principles to create a low-resistance separation path. The conical geometry and strategic positioning of the intake port optimize airflow patterns, reducing pressure loss compared to conventional filter systems.
3Volume of stationary object
If the conical portion projects downward, then the apparatus size is reduced, but the structure becomes more complex
Solution Approach 1:
The patent merges the cyclonic separation function with the air discharge function by integrating the conical separator directly into the air discharge path. The conical component serves both as the separation chamber and as a structural element that projects downward to reduce apparatus size.
Solution Approach 2:
The cyclonic separator is nested within the existing air discharge structure of the developing apparatus. The conical component is positioned to project downward into the toner storage portion, utilizing available space to reduce overall apparatus dimensions without adding external complexity.
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 configuration effectively separates toner from air, reducing toner leakage and maintaining separation performance over time, while also allowing for a downsized apparatus due to reduced pressure loss and the use of smaller components.
Implementation Method 1
a cyclonic separating portion including an intake port, a first discharge port communicating with an interior of the toner storage portion, and a second discharge port communicating with an outside of the toner storage portion, the cyclonic separating portion being configured to take in the air mixed with the toner through the intake port, separate the toner and the air from each other
Implementation Method 2
a cyclonic separating portion including an intake port, a first discharge port communicating with an interior of the toner storage portion, and a second discharge port communicating with an outside of the toner storage portion, the cyclonic separating portion being configured to take in the air mixed with the toner through the intake port, separate the toner and the air from each other
Implementation Method 3
a cyclonic separating portion including an intake port, a first discharge port communicating with an interior of the toner storage portion, and a second discharge port communicating with an outside of the toner storage portion, the cyclonic separating portion being configured to take in the air mixed with the toner through the intake port, separate the toner and the air from each other
Data Source
AI summary
An image forming apparatus includes a photosensitive drum, a toner storage portion, a developing roller including a toner bearing portion, and a cyclonic separating portion including an intake port, a first discharge port communicating with an interior of the toner storage portion, and a second discharge port communicating with an outside of the toner storage portion. The cyclonic separating portion includes a conical portion formed in a conical frustum shape whose radius decreases as the conical frustum shape extends downward. The first discharge port is disposed at a lower end portion of the conical portion. At least a portion of the conical portion projects downward with respect to an inner upper surface of the toner storage portion.