Easy Open Can End Panel Stiffness via Embossed Ribs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional easy open can ends tend to spring back suddenly during opening, causing liquid to splash and contaminate the user and surroundings due to stored elastic energy in the panel, which is not adequately absorbed by shallow panels.
Innovation Solution
The introduction of embossed or debossed ribs extending across the panel with a maximum depth of at least 0.6 mm and a longitudinal taper, increasing the panel stiffness and reducing energy storage, combined with a reduced score residual thickness and optional arrester features to control the opening process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If shallow panels are used in conventional easy open ends, then the end is suitable for stacking and feeding into the seamer, but the panel springs back suddenly during opening causing liquid to splash
Solution Approach 1:
The patent changes the geometric parameters of the panel by introducing ribs with specific dimensions (depth of 0.4-1.0mm, width of 2-10mm) and spacing (5-20mm apart). These parameter changes increase the panel's stiffness and control its deformation behavior during opening, preventing sudden springback while maintaining manufacturability
Solution Approach 2:
The patent introduces curved or arced rib configurations instead of straight lines. The ribs follow arcs with radii of 5-50mm, creating a curved structural pattern that distributes stress more effectively and controls the panel's bending behavior during opening, reducing sudden springback and liquid splashing
2Object-affected harmful factors
If the panel stiffness is increased to reduce springback, then liquid splashing is reduced, but the complexity of the end structure increases
Solution Approach 1:
The patent divides the panel into multiple segments by introducing ribs that create distinct zones. The panel is segmented into regions separated by ribs spaced 5-20mm apart, allowing controlled deformation in each segment while maintaining overall structural integrity. This segmentation increases stiffness without requiring complete redesign of the entire panel
3Object-affected harmful factors
If deep ribs are introduced to increase panel stiffness, then energy storage is reduced and splashing is minimized, but manufacturing complexity increases
Solution Approach 1:
The patent optimizes the rib depth parameter to a specific range (0.4-1.0mm) that provides sufficient stiffness to reduce energy storage and splashing while remaining manufacturable with standard forming equipment. This parameter optimization balances performance improvement with manufacturing ease
Solution Approach 2:
The patent applies rib features to only specific regions of the panel rather than the entire surface. Ribs are positioned strategically in areas where they provide maximum stiffness benefit, with spacing of 5-20mm between ribs. This partial application reduces manufacturing complexity compared to complete surface treatment while achieving the desired reduction in energy storage
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 results in a smoother, more controllable opening process with reduced splashing and improved cleanliness, maintaining existing manufacturing line speeds and compatibility with existing equipment.
Implementation Method 1
The reason that the panel springs back suddenly is that elastic energy is stored in the end during the tear operation. The amount of energy is related to the degree of deformation in the panel.
Data Source
Figure 1~2
Figure 3~4(c)
Figure 5a~6
AI summary
A metal easy open can end adapted for closing a metal can body is proposed. The can end has a score (27) defining a removable panel (26) and a tab (23), located at an edge region of the panel, for applying a force to the panel to allow the panel to be removed in a tear direction. The panel (26) has at least one embossed and/or debossed rib (25 a-c) extending substantially in said tear direction from a location or locations proximal to said tab to a location or locations proximal to an end of the panel opposite to said edge region. The rib(s) have a depth or height of at least 0.6 mm relative to surrounding panel regions along at least a part of the rib extent.