Movable Media Feed Roll for Toner Cartridge Alignment
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Solution Overview
Problem
In electrophotographic image forming devices, precise placement of print media through the toner transfer nip is challenging, affecting the accuracy of toner placement on the media, which impacts print quality.
Innovation Solution
A toner cartridge with a rotatable media feed roll that mates with corresponding media feed rolls in the image forming device, forming a media feed nip, allowing for precise media alignment and improved toner placement through a movable media feed roll assembly that adjusts its rotational axis relative to the housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed media feed roll is used in the toner cartridge, then the device complexity is reduced, but the manufacturing precision of media alignment deteriorates
Solution Approach 1:
The media feed roll is made movable relative to the housing, allowing its rotational axis position to be adjusted dynamically. This enables precise media alignment while maintaining a relatively simple overall device structure, as the adjustment mechanism is integrated into the existing housing rather than adding separate complex alignment systems.
Solution Approach 2:
The position of the media feed roll's rotational axis is changed as a variable parameter that can be adjusted within certain ranges. This allows optimization of media alignment precision without fundamentally redesigning the entire media feed system, achieving high precision through parameter optimization rather than structural complexity.
2Manufacturing precision
If the media feed roll position is fixed relative to the housing, then the ease of manufacture is improved, but the adaptability to achieve precise media placement deteriorates
Solution Approach 1:
The media feed roll is designed with movable mounting that allows adjustment of its rotational axis position relative to the housing. This dynamic configuration enables precise toner placement by allowing optimization of the media feed nip position, while the adjustment mechanism maintains manufacturing simplicity through integrated design rather than requiring separate precision adjustment assemblies.
Data Source
AI summary
A toner cartridge according to one example embodiment includes a housing having a reservoir for holding toner and an outlet in fluid communication with the reservoir for exiting toner from the toner cartridge. A rotatable media feed roll is positioned on an exterior portion of the housing to engage a corresponding media feed roll in the image forming device when the toner cartridge is installed in the image forming device for forming a media feed nip with the corresponding media feed roll in the image forming device when the toner cartridge is installed in the image forming device.