Beverage Can Lid Inner Rib Geometry for Coating Adhesion
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Solution Overview
Problem
Conventional container lids with severe grooves and indentations cause coating flaking or separation, contaminating the contents due to abrupt angles, compromising the integrity and freshness of food and beverage cans.
Innovation Solution
Lids with inner ribs and an outer bead, characterized by specific dimensions and angles, provide structural integrity while minimizing coating separation, featuring concentric alignment and controlled radii to maintain adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional grooves and indentations with large angles are used in lids, then structural integrity and strength are improved, but coating adhesion deteriorates causing flaking and separation
Solution Approach 1:
The patent changes the geometric parameters of the grooves and indentations, specifically reducing the angle from conventional large angles to between 5-45 degrees, and controlling the depth-to-width ratio to be less than 0.5:1. This parameter modification allows the lid to maintain structural strength while preventing coating flaking and separation.
Solution Approach 2:
The patent applies different groove configurations to different locations on the lid. The first groove is positioned at a first location and the second groove at a second location, with each groove having specific angular and depth characteristics tailored to its position. This localized optimization ensures coating adhesion is maintained in critical areas while providing structural reinforcement where needed.
2Stability of the object's composition
If severe grooves and indentations are used to prevent lid crushing, then structural integrity is improved, but coating separation increases contaminating contents
Solution Approach 1:
The patent modifies the geometric parameters of the grooves by limiting the angle to 5-45 degrees and controlling the depth relative to the width (depth-to-width ratio less than 0.5:1). These parameter changes enable the lid to resist crushing and maintain structural integrity during handling and shipping while preventing the severe angles that cause coating to flake and contaminate the contents.
3Ease of manufacture
If conventional lid grooves are used, then manufacturing simplicity is maintained, but coating flaking occurs due to abrupt angles
Solution Approach 1:
The patent specifies precise parameter ranges for groove fabrication: angles between 5-45 degrees and depth-to-width ratios less than 0.5:1. These controlled parameters can be achieved through standard forming and stamping processes, maintaining manufacturing simplicity while ensuring sufficient precision to prevent coating flaking. The parameters are optimized to work with conventional manufacturing capabilities.
Data Source
AI summary
A lid for a container, such as beverage, food, or storage can, may include a lid body and a tab. The lid body may include one or more inner ribs. Each of the one or more inner ribs may have a trough and a peak. The lid body may also include an outer bead. The one or more inner ribs may be concentrically aligned on the lid body radially inward from the outer bead. The one or more inner ribs may be characterized by a width of greater than 1.65 mm measured from the trough of the inner rib to the peak of the inner rib. The tab may be fixed to the lid body.