Can End Bead Configuration for High Pressure Resistance
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Solution Overview
Problem
Metal can ends lack sufficient strength to resist deformation under high internal pressure, particularly during food cooking processes, and are often made from thicker materials to compensate for this weakness.
Innovation Solution
A metal can end configuration featuring a curl section, crown section, counter-sink section, score track section, frangible score, outer and inner downward beads, and a center panel, which allows for crimping to form a seam with the can body, providing enhanced strength and resistance to deformation while enabling thinner material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If thicker materials are used to make can ends, then strength and resistance to deformation are improved, but weight and material cost increase
Solution Approach 1:
The patent applies curvature by forming beads (raised rounded portions) on the can end surface. These beads create a domed, curved structure that distributes stress more effectively across the can end, enhancing strength and resistance to deformation without requiring thicker material. The curved geometry of the beads provides structural reinforcement similar to how domes distribute load in architecture.
Solution Approach 2:
The patent adds dimensional complexity by creating three-dimensional bead structures on the two-dimensional can end surface. The beads extend in the radial dimension, creating a multi-layered structural profile with varying depths and heights. This dimensional addition allows the can end to resist deformation through geometric complexity rather than material thickness.
2Strength
If thicker materials are used to make can ends, then resistance to deformation under pressure is improved, but material consumption and manufacturing cost increase
Solution Approach 1:
The bead structures with their curved, domed surfaces distribute applied pressure across a wider area of the can end. This curvature allows the thin material to better withstand high internal pressures during cooking processes by redirecting stress forces along the curved surfaces, reducing the need for additional material consumption.
Solution Approach 2:
The can end features a composite structure combining the base can end material with the bead reinforcement structures. This composite approach integrates structural reinforcement directly into the can end design, creating a multi-functional element that provides both containment and structural strength without requiring separate reinforcement components or additional material layers.
3Strength
If bead configuration is added to can end, then strength is improved, but manufacturing complexity increases
Solution Approach 1:
The bead structures are formed using standard can-making equipment capable of creating curved surfaces. The forming process utilizes the existing equipment's ability to create domed shapes, integrating bead formation into the conventional can end manufacturing sequence without requiring fundamentally different or highly complex specialized machinery.
Solution Approach 2:
The bead structures are created by modifying parameters within the existing manufacturing process, such as adjusting forming pressure, temperature, or tooling geometry during the can end fabrication. These parameter changes allow the standard equipment to produce the reinforced bead structures without adding significant procedural complexity or requiring entirely new manufacturing processes.
Data Source
AI summary
A can end that is attached to a metal can body with a bottom end forming a cavity that may be filled with food, liquid, etc. The can end is made of metal with a bead configuration located in the outer circumference of the can end that increases its resistance to deformation when subjected to high pressure cooking environments and assists in preventing the can end from separating along the frangible score.