Toner Pack Discharge Geometry for Aggregation Control
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Solution Overview
Problem
Existing toner replenishment systems face issues with electrostatic aggregation of toner in storage containers, leading to toner residue after replenishment and fogging during image formation, particularly due to insufficient charge control and discharge design.
Innovation Solution
A toner pack design featuring a flexible bag-shaped storage portion with a discharge member having an inclined surface and controlled toner composition, including first and second toners with specific surface treatments, to manage electrostatic aggregation and improve discharge efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a flexible bag is used in the toner storage portion to reduce transportation costs and save resources, then cost efficiency is improved, but the toner may be prone to electrostatic aggregation and remain in the storage container after replenishment
Solution Approach 1:
The patent applies parameter changes by controlling the charge quantity of toner particles within a specific range (-15 to -35 e/particle) and adjusting the composition ratio between first and second toner particles (0.10 to 20% by number of second toner). These parameter optimizations resolve the contradiction by preventing electrostatic aggregation while maintaining cost efficiency through flexible bag usage.
2Reliability
If the charge quantity on the toner is controlled to suppress electrostatic aggregation, then toner discharge performance is improved, but insufficient charge control causes fogging during image formation
Solution Approach 1:
The patent precisely controls the charge quantity parameter within the range of -15 to -35 e/particle and optimizes the ratio of second toner particles at 0.10 to 20% by number. This parameter optimization prevents both electrostatic aggregation (improving discharge performance) and fogging (by avoiding excessive charge reduction), thereby resolving the contradiction.
3Volume of moving object
If the discharge section is made smaller to improve compactness, then device size is reduced, but toner may easily remain in the storage container after replenishment
Solution Approach 1:
The patent compensates for the smaller discharge section size by optimizing toner properties: controlling charge quantity at -15 to -35 e/particle and setting second toner composition at 0.10 to 20% by number. These parameter changes improve toner flowability and prevent aggregation, enabling complete discharge from compact sections.
4Productivity
If an inclined surface with 45-90 degrees angle is used to move toner toward the discharge port, then discharge efficiency is improved, but the design complexity increases
Solution Approach 1:
The patent employs an inclined surface with a specific angle range (45-90 degrees) to create a smooth curved path for toner movement. This curved geometric design improves discharge efficiency by guiding toner flow toward the discharge port while maintaining relatively simple structural implementation.
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 reduces toner residue in storage containers and minimizes fogging during image formation by effectively controlling toner charge and enhancing discharge performance.
Implementation Method 1
the internally stored toner may be prone to electrostatic aggregation
Implementation Method 2
an inclined surface to move the received toner toward the discharge port
Data Source
AI summary
A toner pack stores a toner that has first and second toner particles. The surface of the second toner particle has a portion formed by connecting a plurality of silicon-containing protrusions on its surface, with the content of the second toner particle within a specific range relative to the content of the first toner particle. The toner pack has a storage portion and a discharge member, where the discharge member has a receiving port, a discharge port, a fixing part to which the storage portion is fixed, and an inclined surface that causes the toner to move toward the discharge port. The inclined surface that is the closest to the storage portion is at an angle of 45 degrees or more and less than 90 degrees.