Multipart Paper Cover with Reinforcement Ring for Stable Stacking
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Solution Overview
Problem
Existing multipart paper covers lack a secure and stable configuration for fitting onto containers, and efficient production methods to ensure reliable stacking and secure attachment to container lip rims.
Innovation Solution
A multipart cover design featuring a one-piece base body with a cover plate and circumferential cover collar, connected to a reinforcement ring via a peripheral skirt or bead, which forms a circumferential step or shoulder for secure engagement with container lip rims, allowing for stable stacking and easy production through folding and pressing techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple base body structure is used, then manufacturing complexity is reduced, but the cover cannot securely engage with container lip rims
Solution Approach 1:
The base body is divided into functionally distinct segments: a cover plate for structural support, a cover collar for engagement, and a reinforcement ring with peripheral skirt for stabilization. This segmentation allows each component to perform its specific function while maintaining overall structural integrity and secure engagement with container lip rims.
Solution Approach 2:
The reinforcement ring is folded over by 180° to create a peripheral skirt that extends in a different spatial dimension. This dimensional transformation creates a circumferential step or shoulder that provides engagement surfaces for the container lip rim, converting a flat 2D structure into a 3D configuration with functional engagement features.
2Reliability
If the reinforcement ring is folded over by 180° to form a peripheral skirt, then secure engagement with container lip rims is achieved, but production steps increase
Solution Approach 1:
The reinforcement ring is pre-formed with the peripheral skirt already folded over by 180° during the manufacturing process. This preliminary action of folding and pressing creates the engagement structure before the cover is assembled onto the container, ensuring proper formation without requiring complex post-assembly operations.
Solution Approach 2:
The peripheral skirt serves multiple functions simultaneously: it connects the reinforcement ring to the cover collar, forms a circumferential step for engagement, and provides structural stabilization. By merging these functions into a single integrated structure, the design reduces the need for separate components and simplifies the overall assembly process.
3Strength
If the peripheral skirt is folded over below the cover plate, then the reinforcement ring is thickened, but the structure becomes more complex
Solution Approach 1:
The reinforcement ring is divided into distinct functional zones: the upper portion connects to the cover collar, the lower portion forms the peripheral skirt, and the circumferential step provides engagement. This segmentation allows the structure to achieve necessary thickness and strength while maintaining clear functional differentiation and simplifying manufacturing.
Solution Approach 2:
Instead of adding thickness to the reinforcement ring through material accumulation, the design inverts the approach by folding the ring over to create a peripheral skirt that provides thickness through geometric configuration. This inversion achieves the desired thickness while using the same amount of material more efficiently.
4Reliability
If a circumferential bead is used instead of a peripheral skirt, then secure fitting on lip rims is achieved, but manufacturing precision requirements increase
Solution Approach 1:
The design allows for parameter changes in the bead formation process, enabling adjustment of the bead's dimensions, position, and shape to optimize engagement with different container lip rim configurations. This flexibility in parameter adjustment maintains secure fitting while accommodating variations in manufacturing precision.
Solution Approach 2:
The circumferential bead is designed to serve multiple functions: it provides secure fitting on various lip rim configurations, creates a circumferential recess for engagement, and can be flattened to accommodate different container shapes. This multi-functionality reduces the need for highly precise manufacturing by allowing the same structure to adapt to different applications.
Data Source
AI summary
A multipart cover made of paper material and including a one-piece base body having a cover plate and a circumferential cover collar extending from the cover plate. The cover collar, when placed onto a container to be closed, extends upwards away from the container, and a reinforcement ring connected to the cover collar by means of a peripheral skirt. The reinforcement ring in a region below the cover plate, on a side of the cover plate opposite to the cover collar, includes a peripheral skirt forming a circumferential step along the periphery on a radially interior side of the reinforcement ring, or includes a circumferential bead along the periphery.