Developer Supply Path Layout for Reverse Gas Flow in Image Forming
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Solution Overview
Problem
The existing configurations in image forming apparatuses require separate flow paths for gas and developer, complicating the apparatus design and leading to inefficient gas flow, especially when the developer occupies a large cross-sectional area, hindering smooth gas movement.
Innovation Solution
The image forming apparatus integrates a developer flow path that allows gas to flow towards the upstream side in the developer's movement direction, using a shared path with the developer, thereby simplifying the configuration and enhancing gas flow efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate flow path is provided for gas to move from the developing device to the supplying device, then gas flow is enabled, but the apparatus configuration becomes complicated
Solution Approach 1:
The patent merges the gas flow path and developer flow path into a single shared flow path. The gas flow path and developer flow path are combined in the supplying device, allowing both gas and developer to move through the same path without requiring separate dedicated channels. This reduces structural complexity while maintaining functional separation through temporal or spatial sequencing within the shared path.
Solution Approach 2:
The flow path is designed to serve multiple functions: it acts as both a gas flow path and a developer flow path. The supplying device's flow path can accommodate both gas movement from the developing device and developer supply to the developing device, making the path universal and multi-functional rather than dedicated to a single purpose.
2Quantity of substance
If the developer occupies a large cross-sectional area in the flow path, then developer transporting capacity is increased, but gas flow smoothness is hindered
Solution Approach 1:
The patent employs dynamic control of the flow path characteristics. The supplying device adjusts operational parameters to dynamically manage the balance between developer transport capacity and gas flow smoothness. This may involve varying flow rates, pressure conditions, or timing sequences to optimize both functions under different operating conditions.
Solution Approach 2:
The system maintains continuous operation where developer transport and gas flow occur in a coordinated manner without interruption. The flow path design ensures that both developer and gas can move continuously through the shared path, with the developer's large cross-sectional area occupancy being managed to maintain continuous gas flow capability.
Data Source
AI summary
An image forming apparatus includes an image carrier; a developing device that applies a developer to the image carrier; and a supplying device that supplies a developer to the developing device, the supplying device having a developer flow path along which a developer that moves toward the developing device passes, the supplying device being configured such that a gas that has flowed from the developing device to the supplying device passes along the developer flow path toward an upstream side in a movement direction of a developer.