Vented Beverage Can End Score Design for Glug-Free Pouring
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Solution Overview
Problem
Conventional beverage can ends experience unsteady state flow or 'glugs' during pouring due to inadequate venting after opening, which is not effectively addressed by existing can end configurations.
Innovation Solution
A beverage can end design featuring a score with a main portion and a vent portion, where the score is configured such that actuation of the tab from its horizontal rest position to an intermediate position ruptures the main score portion to pivot the tear panel, and further actuation twists to rupture the score extension, creating a vent portion for improved airflow and smoother pouring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional tear panel design is used, then the can can be opened, but air venting after opening is inadequate causing unsteady state flow or glugs during pouring
Solution Approach 1:
The tear panel is segmented into a main portion and a vent portion, allowing independent functionality for opening and venting. The main portion provides the primary opening while the vent portion creates an air vent pathway, resolving the contradiction by separating the opening function from the venting function.
Solution Approach 2:
The score configuration enables dynamic progression from initial opening to venting. As the tab is actuated, the main score ruptures first to open the main portion, then further actuation ruptures the score extension to open the vent portion, creating a dynamic two-stage opening process that improves both reliability and pouring smoothness.
2Reliability
If the score extension is configured to follow the tab actuation path, then venting is optimized, but the manufacturing precision requirements increase
Solution Approach 1:
The score extension is pre-configured in the can end before use, following the anticipated tab actuation path. This preliminary configuration ensures that when the tab is actuated, the score extension naturally ruptures along the predetermined arcuate path, optimizing venting function while reducing manufacturing precision requirements through design rather than precision control.
3Ease of operation
If the main portion of the tear panel is elongated with aspect ratio between 1.3 and 1.7, then opening is facilitated, but the device complexity increases
Solution Approach 1:
The main portion of the tear panel is elongated in the transverse direction with a specific aspect ratio between 1.3 and 1.7. This parameter change optimizes the opening ease by providing sufficient surface area for the tab to actuate while maintaining a manageable geometric complexity that does not significantly increase device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design significantly reduces 'glugging' and enhances the flow rate by allowing air to enter the can, resulting in faster and more consistent pouring of beverages, with the lift-and-twist score embodiments demonstrating up to twice the flow rate of conventional large opening ends.
Implementation Method 1
The tear panel may include (i) a main portion capable of pivoting about a hinge
Implementation Method 2
further actuation of the tab by twisting from the intermediate position ruptures the score extension
Data Source
Figure 1A~3
Figure 1B~4C
Figure 2
AI summary
A beverage can end for seaming onto a can body may include a peripheral wall, a center panel, a tab attached to the center panel by a rivet (56), a tear panel (41b), a main reference line (RM), a transverse reference line (RT), and a score (31b). The score may include arcuate main score (31b) that defines a main portion of the tear panel (41b) and a score extension (32b) that defines a vent portion. The score may be configured such that actuation of the tab from its horizontal rest position to an intermediate position ruptures the main score portion (31b) to pivot the tear panel main portion (40b) about the hinge and further actuation of the tab by twisting from the intermediate position ruptures the score extension (32b).