Rotating Dosing Member Prevents Substance Leakage in Container Closure
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Solution Overview
Problem
Existing dosing closures for containers lack features that prevent substances from being dispensed into a retaining space, leading to inefficiencies in dispensing specific amounts of liquids or particulate materials.
Innovation Solution
A doser assembly with a dosing member having a bottom wall, retaining wall, and separating wall is configured to retain a dispensable amount of substance within a container, featuring dispensing openings and a cap or cover that allows for precise dispensing, preventing substance from entering the retaining space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a dosing closure is used to dispense substances from a container, then dispensing functionality is provided, but substances may unintentionally enter the retaining space causing dosing inaccuracies
Solution Approach 1:
The dosing closure is divided into functionally separate sections: a retaining space for the dosed substance and a separate retention space for preventing unwanted substance entry. The partition wall with channel creates distinct zones that segregate dosing functions from containment functions, allowing each to operate independently without interference.
Solution Approach 2:
The channel in the partition wall acts as an intermediary element between the retaining space and retention space. It allows controlled interaction between the two spaces during dispensing while maintaining their functional independence, enabling the dosing mechanism to work effectively without contamination from the retention space.
2Ease of operation
If the dosing member allows substance flow for dispensing, then dispensing capability is provided, but substance may pass into the retaining space when not intended
Solution Approach 1:
The dosing closure employs dynamic control through the rotatable dosing member with selectively positionable openings. The openings can be rotated into different positions relative to the container opening - aligned for dispensing or misaligned for prevention - allowing the system to dynamically switch between dispensing mode and containment mode based on operational needs.
Solution Approach 2:
The system changes the parameter of substance flow by rotating the dosing member to different angular positions. When the opening aligns with the container opening, substance flow is permitted for dispensing. When misaligned, substance flow is blocked, preventing unwanted entry into the retaining space. This parameter change (angular position) controls the flow state.
3Device complexity
If a simple dosing mechanism is used, then device complexity is reduced, but inability to prevent substance entry into retaining space occurs
Solution Approach 1:
The dosing closure integrates multiple functions into a single device: the rotatable dosing member simultaneously serves as a dispensing control mechanism and a containment barrier. The partition wall with channel provides both structural separation and controlled substance flow management. This multi-functionality achieves precise dosing and substance prevention without requiring separate complex systems.
Solution Approach 2:
The dosing closure features nested structural elements where the partition wall is integrated within the closure body, the channel is formed within the partition wall, and the dosing member rotates within the closure assembly. This nested arrangement achieves complex functionality within a compact structure, maintaining dosing precision without excessive external complexity.
Data Source
AI summary
Doser for a container containing a substance. The doser includes a dosing member configured to be located at least partially inside a dispensing end of a container. The dosing member includes at least a bottom wall, a retaining wall and a retaining space of predetermined volume configured to retain a dispensable amount of said substance. When the doser is arranged on a container and the container dispenses the dispensable amount of the substance, the dosing member substantially prevents the substance contained in the container from either passing into the retaining space or being dispensed with the dispensable amount.