Paper Multipart Cover With Bead and Reinforcement Ring
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Solution Overview
Problem
Existing multipart covers made of paper materials face challenges in achieving leak-tight closure and secure fit on containers due to overlapping steps and inadequate design for various lip rim configurations, leading to potential leaks and jamming issues during stacking.
Innovation Solution
A multipart cover design featuring a one-piece paper cut-out base body with a continuous cover collar and bead that engages behind the container's lip rim, combined with a reinforcement ring for stability, allowing for self-centering and leak-tight closure, and facilitating easy stacking by preventing jamming through specific geometric configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a multipart cover is made from assembled paper components, then manufacturing flexibility is improved, but overlapping steps are created that compromise leak-tightness
Solution Approach 1:
The patent merges the cover collar and cover plate into a single one-piece base body formed from one paper cut-out, eliminating the overlapping joint between separate components. This integration removes the step that caused leakage while preserving the multipart structure's manufacturing advantages through separate assembly of the base body and reinforcement ring.
2Reliability
If the cover collar is made continuous without steps, then leak-tightness is improved, but adaptability to various lip rim configurations deteriorates
Solution Approach 1:
The patent introduces a bead on the cover collar that can deform elastically during placement to adapt to different lip rim shapes and sizes. This dynamic element allows the continuous cover collar to conform to various container configurations while maintaining leak-tightness, resolving the contradiction between structural continuity and adaptability.
3Reliability
If the cover design includes engagement features for secure hold, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent uses a flexible bead formed from the paper material itself to create the engagement feature. This thin-film approach provides the necessary securing function through elastic deformation and snap-fit engagement with the lip rim, avoiding complex rigid mechanical structures while maintaining reliable hold.
4Reliability
If reinforcement structures are added to prevent jamming during stacking, then reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The patent segments the cover into two main parts: a one-piece base body and a separate reinforcement ring. This segmentation allows the reinforcement function to be added as a distinct component that prevents jamming during stacking, while the base body remains simple and easy to manufacture. The modular approach distributes complexity across separate manufacturing steps.
Data Source
AI summary
A multipart cover made of paper material and including a base body having a cover plate and a circumferential cover collar extending from the cover plate, wherein the cover collar, in a condition where same is placed onto a vessel to be closed, surrounds an upper rim of a vessel to be closed, and a reinforcement ring surrounds the cover collar at least sectionally on the radially exterior side of the cover collar. The cover collar includes at least one bead encircling the cover collar in the circumferential direction, and when viewed in the elevation direction the bead is disposed at a constant distance from the cover plate.