Universal Toner Seal with Selective Alignment Features
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Solution Overview
Problem
In electrophotographic image forming devices, toner leakage occurs due to misalignment of seals between toner handling components and the housing, leading to inefficiencies and increased costs from improper sealing.
Innovation Solution
A toner seal with alignment features, such as slots and tabs, is designed to selectively align with corresponding features on different types of toner containers, ensuring proper positioning and preventing toner leakage by covering openings in the toner reservoirs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a seal is used to prevent toner leakage, then toner containment is improved, but alignment precision deteriorates due to misalignment between the seal and toner container
Solution Approach 1:
The alignment features (projections and recesses) enable the seal to self-align with the toner container during installation. The geometric constraints of the mating features automatically position the seal correctly without requiring external alignment tools or complex positioning mechanisms, thereby improving alignment precision while maintaining reliable toner containment.
Solution Approach 2:
The alignment features act as intermediary elements between the seal and the toner container. These features mediate the positioning relationship by providing fixed geometric references that ensure accurate alignment, thereby resolving the contradiction between reliable sealing and precise alignment.
2Manufacturing precision
If different seals are used for different toner container types, then alignment precision is improved, but device complexity increases
Solution Approach 1:
A single seal design incorporates multiple alignment features (projections and recesses) that can mate with corresponding features on different types of toner containers. This universal seal design maintains alignment precision across various container types while reducing the number of different seal varieties needed, thereby decreasing device complexity.
Solution Approach 2:
The alignment functionality is segmented into discrete features (projections and recesses) that can be independently configured to match different toner container types. This segmentation allows a single seal to accommodate multiple container variations through selective feature engagement, reducing the need for multiple specialized seals.
3Manufacturing precision
If alignment features are added to the seal, then alignment precision is improved, but manufacturing complexity increases
Solution Approach 1:
The seal is constructed as a flexible or elastomeric component that can incorporate molded-in alignment features (projections and recesses). The flexibility of the material allows these features to be integrated into the sealing element during molding without requiring separate assembly steps, thereby maintaining ease of manufacture while achieving improved alignment precision.
Solution Approach 2:
The seal combines sealing material with integrated alignment features in a composite structure. This allows the alignment features to be formed as part of the seal manufacturing process (e.g., through injection molding or compression molding), avoiding additional manufacturing steps and maintaining ease of production while achieving precise alignment.
Data Source
AI summary
A toner sealing system is described including a seal having first and second alignment features. The seal is selectably installable on one of a first toner container of a first type and a second toner container of a second type. The first alignment feature is matable with a first corresponding alignment feature on the first toner container when the seal is installed on the first toner container for aligning the seal to the first toner container. The second alignment feature is matable with a second corresponding alignment feature on the second toner container when the seal is installed on the second toner container for aligning the seal to the second toner container. Embodiments include those wherein the first alignment feature does not align the seal to the second toner container, and the second alignment feature does not align the seal to the first toner container.