Paper Multi-Part Lid with Reinforcing Bead for Jam-Free Stacking
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Solution Overview
Problem
Existing multi-part lids made from paper materials often suffer from poor sealing and stacking issues due to overlapping edges and lack of stability, leading to insecure fits and jamming when stacked.
Innovation Solution
A multi-part lid design featuring a base body with a continuous peripheral collar and a reinforcing ring that includes a circumferential bead, allowing for a tight seal and secure hold on containers, with the bead engaging behind a mouth roll, and a radially outward bead design that prevents lids from jamming when stacked.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a multi-part lid is made with overlapping edges to ensure structural integrity, then the lid gains strength and stability, but the sealing performance deteriorates due to steps and overlaps that impair tightness
Solution Approach 1:
The lid is divided into a base body and a separate reinforcing ring that can be applied afterward. This segmentation allows the base body to be formed without overlaps for good sealing, while the reinforcing ring adds strength where needed without compromising the seal between the lid and container.
Solution Approach 2:
The base body is formed first with a continuous collar that provides good sealing contact with the container rim. The reinforcing ring is then applied in a subsequent step to the already-formed base body, allowing the sealing surface to be established before adding structural reinforcement elements.
2Stability of the object's composition
If a reinforcing ring is added to the lid collar to enhance stability, then the lid gains structural support, but the device complexity increases due to additional components and assembly steps
Solution Approach 1:
The reinforcing ring is merged with the lid collar through adhesive bonding to create a combined structure that provides both sealing and reinforcement functions. This merging reduces the number of separate components while maintaining the stability benefits of the reinforcing ring.
Solution Approach 2:
The reinforcing ring is applied locally to specific areas of the lid collar where additional strength is needed, rather than requiring the entire lid structure to be more complex. This localized reinforcement maintains simplicity in non-critical areas while providing stability where required.
3Productivity
If lids are stacked for storage and transport, then space efficiency improves, but the lids may jam together due to lack of separation features
Solution Approach 1:
The bead on the reinforcing ring creates an asymmetric profile that prevents lids from sliding too far together during stacking. This asymmetric feature acts as a mechanical stop that maintains separation between stacked lids while allowing them to be stored vertically in a space-efficient manner.
Solution Approach 2:
The bead structure acts as an intermediary element between stacked lids, providing a physical barrier that prevents direct contact and jamming between the lid collars. This intermediary feature enables efficient stacking while maintaining ease of separation.
Data Source
Figure 1~5
Figure 6~7
Figure 8~9
AI summary
The multi-section lid (10) is made of a paper material. A base portion (12) is provided with a cover plate (18) that is equipped with a lid collar (20). The lid collar is locked on an upper edge of the to-be-closed container (16) in the mounted state. A reinforcing ring (14) is provided on the radial outer side of the lid collar to surround the lid collar. An independent claim is included for a method for manufacturing multi-section lid.