Developing Device Sheet Member for Transport Leakage Control
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Solution Overview
Problem
Existing developing devices face issues with developer leakage during transportation due to the absence of effective sealing mechanisms, which compromises the integrity of the developing process and the device's functionality upon installation.
Innovation Solution
A developing device design featuring a removable sheet member that forms an enclosed space containing the developer, with a protruding portion for easy removal, ensuring the developer remains contained during transportation and installation, and includes a compartmentalized structure with rotatable developing and supplying rotators supported by side plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sheet member is used to isolate the developer compartment, then developer leakage is prevented during transportation, but the device complexity increases due to the additional sealing component
Solution Approach 1:
The patent employs a sheet member (flexible thin film) to isolate the developer compartment from the outside environment. This thin film structure effectively prevents developer leakage during transportation while avoiding the complexity of rigid sealing mechanisms. The sheet member can be easily installed and removed, providing reliable containment without significantly increasing device complexity.
2Reliability
If the sheet member is completely enclosed, then developer containment is maximized, but the ease of operation deteriorates due to difficulty in removal and installation
Solution Approach 1:
The sheet member is designed with a protruding portion that extends beyond the compartment opening, creating a segmented structure where the main body remains enclosed while the protruding part serves as a convenient handle. This segmentation allows users to easily grip and remove the sheet member without compromising the enclosed containment structure, thus improving ease of operation while maintaining reliable developer containment.
3Productivity
If the developing device is prefilled with developer, then productivity is improved by ready-to-use functionality, but the object-generated harmful factors increase due to potential developer leakage during transport
Solution Approach 1:
The sheet member is installed in the developing device before the device is dispatched from the factory, creating a preliminary protective barrier against developer leakage during transportation and storage. This preliminary anti-action prevents harmful leakage effects while maintaining the productivity benefit of having the device prefilled with developer ready for immediate use upon installation.
Data Source
AI summary
A developing device contains a developer and includes a developing roller that bears the developer and a developer supplying rotator that is disposed opposite the developing roller. The developer supplying rotator rotates in a predetermined direction to supply the developer onto the developing roller. A compartment accommodates the developer supplying rotator. A first developing side plate supports the developing roller rotatably. A second developing side plate supports the developer supplying rotator rotatably. A sheet member separates the developing roller from the developer supplying rotator. The sheet member forms an enclosed space that contains the developer in the compartment. The sheet member is removed from the developing device. The first developing side plate has a sheet opening that is disposed opposite the second developing side plate. A part of the sheet member protrudes toward an outside of the developing device through the sheet opening.