Developer Device Airflow Passages for Toner Containment
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Solution Overview
Problem
Toner scattering within image forming apparatuses, such as copiers and printers, leads to malfunctions due to toner adherence on electrostatic chargers, requiring additional components like filters and fans for collection, which increase device size and maintenance complexity.
Innovation Solution
A developer device with a developing roller and an elastic sheet that guides airflow through specific passages to capture and recirculate toner, reducing scattering by utilizing the magnetic properties of the developing roller and airflow to contain toner within the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If filters and fans are added to collect scattered toner, then toner scattering is reduced, but device size and complexity increase
Solution Approach 1:
The patent extracts the toner scattering problem from the overall system by creating a dedicated containment structure (housing with airflow passages) that isolates and manages scattered toner locally, eliminating the need for external filtration and collection systems
Solution Approach 2:
The developing roller itself serves dual functions: it not only develops the image but also acts as a toner containment mechanism through its magnetic properties and the airflow passages integrated into its structure, making the system self-sufficient without external filters or fans
2Object-affected harmful factors
If filters and fans are added to collect scattered toner, then toner scattering is reduced, but device size increases
Solution Approach 1:
The patent nests the airflow passages and toner containment structure within the existing developing roller assembly, integrating multiple functions into a compact nested configuration that eliminates the need for additional external components
Solution Approach 2:
The patent merges the toner containment function with the existing developing roller structure by integrating airflow passages into the roller housing, combining multiple functions (development, containment, airflow management) into a single integrated component
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 solution effectively minimizes toner scattering, eliminating the need for external filters and fans, resulting in a smaller, more maintainable device with improved image forming performance.
Implementation Method 1
guiding airflow along a first airflow passage, which is formed in the housing and partially facing the second portion of the developing roller, and guiding airflow along a second airflow passage facing the third portion of the developing roller
Implementation Method 2
a developer device with a developing roller and an elastic sheet that guides airflow through specific passages to capture and recirculate toner, reducing scattering by utilizing the magnetic properties of the developing roller
Data Source
AI summary
A developing method in a developer device having a developing roller configured to rotate within a housing, the developing roller having a first portion that is exposed through an opening of the housing, a second portion at which developer attached to the developing roller separates from the developing roller and a third portion between the first and second portions, and an elastic sheet in contact with the developing roller between the second and third portions of the developing roller, the method includes guiding airflow along a first airflow passage, which is formed in the housing and partially facing the second portion of the developing roller, and guiding airflow along a second airflow passage facing the third portion of the developing roller and adjacent to the first airflow passage.