Sealing Membrane Pull-Tab Stiffening Structure
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Solution Overview
Problem
Existing sealing membranes with pull-tabs face challenges in consistent and controlled pre-bending or pre-folding during manufacturing, leading to uncontrolled folding and reduced user-friendliness due to the small size of the pull-tab and difficulties in precise positioning in the production line.
Innovation Solution
Incorporating a stiffening structure with a pattern of embossed or corrugated elevations and depressions that defines an intended folding line across the pull-tab, providing controlled folding and preventing unwanted bending, thereby ensuring the pull-tab remains stiff and easy to grip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the pull-tab is made small to facilitate easy gripping and release, then ease of operation is improved, but manufacturing precision deteriorates due to difficulties in controlling the exact position and consistent pre-bending
Solution Approach 1:
The patent applies a stiffening structure (such as a crease line or pre-formed fold) specifically to the pull-tab region, creating localized structural differentiation. This allows the pull-tab to maintain its small size for easy gripping while the stiffening structure provides the necessary positional control and prevents unwanted bending during manufacturing and storage.
Solution Approach 2:
The patent incorporates a pre-formed fold or crease line in the pull-tab during the manufacturing process. This preliminary action establishes the intended folding line before the product reaches the consumer, ensuring consistent positioning and preventing uncontrolled bending later, thereby resolving the manufacturing precision issue while maintaining the small, grippable size.
2Reliability
If the pull-tab is pre-bent or pre-folded during manufacturing to prevent unwanted bending, then reliability is improved, but device complexity increases due to additional manufacturing steps
Solution Approach 1:
The patent changes the physical parameters of the pull-tab by introducing a stiffening structure with specific geometric features (crease lines, fold lines, or rigidifying elements). This parameter change enables the pull-tab to maintain its shape and folding position without requiring complex active control mechanisms, thus improving reliability while avoiding excessive manufacturing complexity.
Solution Approach 2:
The stiffening structure is designed to automatically guide the folding process and maintain the pull-tab's configuration without requiring additional active control systems or complex manufacturing equipment. The structural features themselves perform the function of controlling the fold, making the system self-regulating and reducing overall device complexity.
3Reliability
If the pull-tab is made stiff to prevent unwanted bending, then reliability is improved, but ease of operation deteriorates due to reduced flexibility
Solution Approach 1:
The patent applies stiffening structures only in specific locations within the pull-tab (such as along the folding line or in the base region), rather than making the entire pull-tab uniformly stiff. This localized stiffening maintains shape control and reliability where needed while preserving flexibility in the gripping portion, thus resolving the contradiction between reliability and ease of operation.
Solution Approach 2:
The pull-tab is divided into functional segments: a stiffened region for structural support and shape control, and a more flexible region for user gripping. This segmentation allows each portion to optimize its properties for its specific function, maintaining reliability through stiffening while preserving ease of operation through flexibility in the gripping zone.
Data Source
AI summary
The invention concerns a sealing membrane (2) for a container (5), said membrane (2) having an edge region (4) intended to be secured around an opening (5a) of the container (5) such as to form a sealing of the container (5), the membrane (2) comprising a pull-tab (1) extending from a portion of the edge region (4) such as to facilitate simplified release of the membrane (2). The invention is characterized in 12 that the pull-tab (1) comprises a stiffening structure (7) arranged in a pattern that defines an intended folding line (3) extending across the pull-tab (1). The invention also concerns a container arrangement (8) comprising a container (5) with an opening (5a) and, at least partly secured to the container (5) around the opening (5a), a sealing membrane (2) of the above type. The invention also concerns a method of manufacturing a sealing membrane (2) of the above type, wherein the method comprises the step of embossing, corrugation, creasing, folding and/or heat shaping the stiffening structure (7).