Developer Tank Segmentation for Overflow Prevention
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Solution Overview
Problem
Existing developing apparatuses face challenges in accurately detecting when a developer tank is full due to uneven developer distribution and limited sensor installation positions, leading to potential overflow issues.
Innovation Solution
The developing apparatus incorporates a dual-screw system with helical blades to circulate and agitate the developer, along with a developer detection sensor placed strategically to detect the developer amount, and a discharge screw mechanism to reverse direction when the tank is full, ensuring accurate fullness detection and preventing overflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a developer detection sensor is installed in the existing developing apparatus, then the developer amount can be detected, but the sensor installation position is limited and the developer surface change may not be correctly detected due to uneven developer distribution
Solution Approach 1:
The developer tank is divided into multiple storage chambers (first storage chamber, second storage chamber, third storage chamber) separated by partitions. Each chamber has its own developer detection sensor, allowing the large tank to be segmented into smaller detection zones where developer distribution is more uniform and detectable.
Solution Approach 2:
Conveyance members (screws with helical blades) are introduced as intermediaries to actively circulate and distribute the developer throughout the tank. These conveyance members ensure that the developer surface remains detectable by creating controlled flow patterns and preventing stagnant zones where detection would be unreliable.
2Productivity
If the developer tank capacity is increased to reduce replenishment frequency, then productivity improves, but the risk of overflow increases and detection becomes more difficult
Solution Approach 1:
By dividing the large-capacity tank into multiple smaller storage chambers, each chamber can be independently monitored by its own detection sensor. This segmentation maintains high overall capacity while enabling reliable detection at multiple points, preventing overflow even when the total volume is large.
Solution Approach 2:
Multiple developer detection sensors provide continuous feedback on the developer amount in each storage chamber. This feedback mechanism allows the system to monitor fill levels in real-time and trigger alerts or automatic shutdowns before overflow occurs, enabling reliable operation with large tank capacities.
3Measurement precision
If conveyance members are added to improve developer distribution, then detection accuracy improves, but device complexity increases
Solution Approach 1:
The conveyance members are designed to perform dual functions: they both circulate/distribute the developer (improving detection) and serves as structural components of the tank itself. The screws with helical blades are integrated into the tank walls, eliminating the need for separate external conveyance mechanisms and reducing overall device 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 solution allows for precise determination of the developer tank's fullness and prevents overflow by strategically placing the developer detection sensor and utilizing a reversible discharge screw, ensuring efficient operation and maintaining developer levels.
Implementation Method 1
conveyance members include a first screw and a second screw each having a helical blade provided on a periphery of a rotary shaft... rotate to circulate the developer in the developer tank
Implementation Method 2
controls the density of a developer by detecting the permeability of the developer with a magnetic sensor
Data Source
AI summary
A developing apparatus includes: a developer tank that contains a developer; and conveyance members that convey the developer while agitating the developer. The conveyance members include a first screw and a second screw. The developer tank includes: a first storage chamber in which the first screw is provided; a second storage chamber in which the second screw is provided; a partition that separates the first storage chamber from the second storage chamber; and a flow area that opens the partition to flow the developer between the first storage chamber and the second storage chamber; a developer detection sensor that detects an amount of the developer thereof; a discharge port that discharges the developer; and a discharge guide that guides the developer to the discharge port. The developer detection sensor detects that the developer tank is full according to the amount of the developer.