Container Closure Measuring Chamber Sealing
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Solution Overview
Problem
Existing container closures for powdered materials suffer from poor sealing, leading to environmental humidity exposure and leakage during measurement and discharge, particularly for hygroscopic substances, and are often complex to manufacture and operate.
Innovation Solution
A container closure with a pivotally movable top nested within a cap, featuring a measuring chamber with improved sealing mechanisms, including a sandwiched structure between side and rear cap walls, and stoppers to secure the top in closed and open positions, ensuring consistent and leak-proof dispensing of powdered materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing container closures with measuring chamber are used, then measuring function is provided, but sealing performance deteriorates leading to humidity ingress and leakage
Solution Approach 1:
The measuring chamber is nested within the closure body, with the chamber positioned inside the cap structure. This nesting arrangement allows the measuring chamber to be integrated into the closure without compromising the overall sealing integrity, as the chamber is surrounded by the cap walls that provide the sealing barrier against humidity and leakage
Solution Approach 2:
The closure design incorporates localized sealing features at critical positions: a sealing bead at the interface between the cap and container opening, and sealing surfaces at the measuring chamber discharge opening. These localized quality enhancements ensure reliable sealing at the most vulnerable points where humidity ingress and leakage are most likely to occur
2Reliability
If complex sealing mechanisms are added to improve sealing, then sealing performance improves, but device complexity increases
Solution Approach 1:
The sealing functions are merged into the cap structure itself rather than being separate components. The cap walls form the measuring chamber boundaries, the cap bottom forms the discharge opening, and sealing beads are integrated into the cap geometry. This merging eliminates the need for separate sealing mechanisms while maintaining reliable sealing performance
Solution Approach 2:
The closure design uses the cap's own structural elements to provide sealing: the cap walls serve as chamber boundaries, the cap bottom provides the discharge opening with integrated sealing surface, and the sealing bead is formed as part of the cap geometry. This self-service approach ensures reliable sealing without adding complex external sealing mechanisms
3Ease of operation
If measuring chamber is made accessible for filling and discharge, then usability improves, but sealing reliability during operation deteriorates
Solution Approach 1:
The closure design incorporates a pivotable cap that can rotate between a closed position (sealing the measuring chamber) and an open position (allowing access for filling and discharge). This dynamic element allows the closure to transition between sealed and accessible states, maintaining sealing reliability when closed while providing ease of operation when opened
Solution Approach 2:
The measuring chamber is pre-filled with powdered material through the pivotable cap mechanism before the actual dispensing operation. This preliminary filling action separates the filling process from the discharge process, allowing the sealing mechanism to be optimized for each function: the cap seals during storage and transport, opens for pre-filling, then seals again for controlled discharge
Data Source
Figure 1A~2B
Figure 3A~5B
Figure 6A~7B
AI summary
The present invention discloses a container closure for powdered material with improved sealing of its measuring chamber. The measuring chamber is defined by four walls: a front chamber wall (46), two side chamber walls (47) connected to the chamber wall (49) and a rear chamber wall (48). Said measuring chamber is enclosed by the top inner surface (45) of the pivotally movable top (30), two front cap walls (41), two rear cap walls (42) together with a front cap tooth (43) and a rear cap tooth (44). Improved sealing of the measuring chamber is achieved in a way that each side chamber wall (47) is sandwiched between the rear cap wall (42) from the inner side of the chamber (40) and the front cap wall (41) from the outer side of the measuring chamber. (40) This solution ensures that the powdered material stays within the said measuring chamber.