Flip-Up Pop-Top Can Lid With Puncturing Opening Mechanism
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Solution Overview
Problem
Current pop-top cans are difficult for individuals with arthritis or those with larger fingers to open, and the scored region can be unsanitary as it contacts the contents when opening, with previous solutions like removable pull-tabs posing litter and safety hazards.
Innovation Solution
A pop-top can design featuring a partially detachable lid with a score line, a puncturing means, and an opening mechanism comprising a hub, spokes, a ridge, a lip, and an arm that moves to create a slight opening in the score line, allowing the lid to be lifted upward for opening without contacting the contents, and includes a ratchet mechanism to prevent accidental opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a tab is riveted flat against the top of the can, then the can structure is simple and secure, but it becomes difficult for individuals with arthritis or larger fingers to lift and open
Solution Approach 1:
The opening mechanism transitions from a static flat tab to a dynamic flip-up structure that moves through defined paths. The tab is connected via a pivot point allowing it to rotate upward and outward, creating motion that assists users with limited hand strength. This dynamic movement transforms the opening action from purely vertical lifting to a multi-directional flipping motion that leverages gravity and mechanical advantage.
Solution Approach 2:
A pivot connection serves as an intermediary element between the tab and the can lid, enabling the tab to rotate rather than requiring direct vertical lifting. This pivot point acts as a mechanical mediator that converts a difficult lifting motion into an easier flipping motion, reducing the force required by users with arthritis or larger fingers.
2Ease of manufacture
If the scored region is directed downward into the can, then the opening mechanism is simple, but it contacts the beverage or foodstuff creating unsanitary conditions
Solution Approach 1:
Instead of directing the scored region downward into the can as in traditional designs, the score line is repositioned to extend toward the edge of the lid and the scoring direction is inverted. This causes the separation to occur at the periphery rather than the center, preventing the scored region from contacting the beverage or foodstuff while maintaining manufacturing simplicity.
Solution Approach 2:
The score line geometry is changed from a radial pattern directing inward to a pattern that extends to the lid edge. This dimensional repositioning moves the separation path to a different spatial location (the periphery) where it cannot contaminate the contents, while the scoring process itself remains equally simple to manufacture.
3Ease of operation
If a removable pull-tab is used, then opening becomes easier, but it creates litter, choking hazards, and severed edges that can cause cuts
Solution Approach 1:
The lid is segmented into two parts: a fixed portion remaining on the can and a partially detachable portion that flips up and away. This segmentation allows the opening function to be achieved without complete removal, keeping the tab attached to provide structural support while creating an accessible opening. The partial detachment eliminates the litter and choking hazards of fully removable tabs while maintaining ease of opening.
Solution Approach 2:
The flip-up mechanism and controlled separation path are designed to prevent the tab from becoming a loose projectile or creating sharp severed edges. By guiding the tab through a defined flipping motion and maintaining its connection to the lid, the design preemptively counteracts the potential harms of litter, choking hazards, and cut risks associated with completely removable tabs.
4Ease of operation
If the tab is lifted upward and away from the top of the can, then opening is achieved, but it requires significant force that is difficult for individuals with arthritis or larger fingers
Solution Approach 1:
The opening mechanism uses dynamic motion (flipping) rather than static lifting. The tab rotates through an arc rather than moving purely vertically, allowing users to leverage body weight and gravity to assist the opening force. This dynamic approach reduces the peak force required compared to traditional vertical lifting.
Solution Approach 2:
The flip-up motion follows a curved path rather than a straight vertical line. This curved trajectory allows the tab to be pulled back and then flipped upward, utilizing the user's pulling motion more effectively and reducing the direct upward force needed. The curved path of the pivot connection mechanics provides mechanical advantage.
Data Source
AI summary
The present invention is a flip-up pop-tab in which a partially detachable portion of a lid of a can is separated from the can and hinged away from the opening created in the lid.