Container Lid With External Rivet Prevents Contamination
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Solution Overview
Problem
Existing lids for containers fail to ensure complete hygiene and non-contamination, as the closing element may enter the container during opening, leading to potential contamination or pollution, especially when containing food, drinks, pharmaceutical substances, or other sensitive materials.
Innovation Solution
A lid design featuring a closing element defined by a line of incision with a flexible tongue and a mechanical element that ensures the closing element is lifted without entering the container, remaining attached to the lid, and a variable cross-section line of incision for easy opening and secure attachment, preventing contamination and improving production efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the closing element is connected to the opening lever by a rivet disposed inside the line of incision, then the closing element can be pulled open easily, but the closing element may enter the container during opening causing contamination
Solution Approach 1:
The patent inverts the conventional arrangement by positioning the rivet outside the line of incision rather than inside it. This reversal changes the opening mechanism: the closing element is pulled from its perimeter by the opening lever connected via the externally positioned rivet, causing the entire closing element to be drawn outward away from the container opening, preventing contamination while maintaining ease of operation
Solution Approach 2:
The rivet acts as an intermediary element positioned outside the line of incision, mediating between the opening lever and the closing element. This intermediary positioning ensures that the pulling force is applied in a way that extracts the closing element from the container opening area, preventing contamination while facilitating easy opening
2Productivity
If the closing element is completely separated from the lid during opening, then the delivery aperture is fully opened, but the closing element may be lost or cause contamination
Solution Approach 1:
The closing element is designed to be nested within the lid structure through the line of incision that defines its perimeter. When pulled, it can be fully extracted to open the delivery aperture completely for efficient product flow, yet remains associated with the lid through the incision path, preventing loss and contamination
3Ease of manufacture
If the line of incision has a constant cross-section, then the manufacturing is simpler, but the opening process requires more force and may not provide secure attachment
Solution Approach 1:
The line of incision is designed with variable cross-section characteristics at different locations: certain segments have reduced thickness or modified geometry to facilitate easier separation and opening, while other segments maintain sufficient thickness for secure attachment and manufacturing integrity. This local variation optimizes both manufacturing and opening processes
Data Source
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AI summary
A lid for a container (11) made of metal and able to contain a substance comprises a closing element (12) defined by an incision line (14) provided with a front portion (18), an opening lever (16) disposed across the incision line (14) and comprising a fulcrum front end (20) disposed at the front of the front portion (18), and an intermediate region (23) provided with a flexible tongue (26) attached to the closing element (12). A mechanical element (28) configured to attach the flexible tongue (26) mechanically to the closing element (12) is disposed essentially tangent to the front portion (18) of the incision line (14).