Cover Strip with Elastic Sealing Flap for Uneven Joints
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Solution Overview
Problem
Existing cover strips for window or door frames have complex structures and require a polyurethane foam joint, necessitating a recess and separate sealing steps, which are not efficient for uneven surfaces or residues.
Innovation Solution
A simple, one-piece strip with an integrated sealing system using an expandable or elastic material and self-adhesive tape that adapts to surfaces without the need for a foam joint, allowing for effective sealing without adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cover strip with a foot area and adhesive bead is used, then the sealing function is improved, but the device complexity increases and a recess must be created
Solution Approach 1:
The sealing flap is integrated directly into the cover strip as a unified component, eliminating the need for separate adhesive beads and foot areas. The sealing flap combines the functions of sealing and attachment, creating a simpler one-piece structure that maintains effective sealing performance.
Solution Approach 2:
The sealing function is extracted from the complex multi-part structure (foot area + adhesive bead) and concentrated into a single sealing flap element that is directly attached to the cover strip, reducing overall structural complexity while preserving sealing capability.
2Reliability
If a cover strip with a foot area is used, then the sealing function is improved, but the ease of operation deteriorates due to requiring a recess
Solution Approach 1:
The sealing flap is extracted as a separate, movable element from the main cover strip body, allowing it to be independently positioned and adjusted during installation without requiring pre-formed recesses or complex positioning features.
Solution Approach 2:
The sealing flap is designed to be movable relative to the cover strip, enabling dynamic adjustment during installation to accommodate varying joint conditions and eliminating the need for fixed recesses or pre-positioning requirements.
3Ease of operation
If a flat strip with self-adhesive sealing tape is used, then the ease of operation is improved, but the sealing function deteriorates on uneven surfaces
Solution Approach 1:
The sealing flap is designed with specific local properties (flexibility, thickness, material composition) that enable it to conform to uneven surfaces and fill gaps, while the main cover strip body maintains its structural integrity and ease of installation.
Solution Approach 2:
The sealing flap is constructed as a flexible element that can deform and adapt to irregular surface geometries, ensuring effective sealing contact on uneven substrates while maintaining the simplicity of the overall installation process.
4Strength
If a strip with adhesive layer is used, then the attachment function is improved, but the sealing function deteriorates due to foam residues
Solution Approach 1:
The sealing function is extracted from the adhesive attachment system and assigned to a separate sealing flap element. This separation allows the adhesive to provide strong attachment while the sealing flap provides reliable sealing, with the sealing flap's flexibility enabling it to bridge over foam residues rather than being blocked by them.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The strip provides a seamless seal on uneven surfaces and compensates for foam residues, eliminating the need for a recess and separate sealing steps, ensuring a reliable and flexible sealing solution.
Implementation Method 1
a sealing flap (4) which is integrated into the cover strip (1) and consists of an elastic or expandable material
Implementation Method 2
A (self-)adhesive sealing tape 5 is arranged on the edge region 4 of the strip
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A strip (1) designed to cover an area between a building element (20) and a building component (21) is laterally adhered to the building element (20) using a (self-)adhesive sealing tape (5). A strip (13) provided in the area of the edge (10) of the strip (1) facing the building component (21) in its operating position consists of an expandable or elastic material that, under pressure, rests against the facing surface of the building component (21) and ensures a seal without adhesive. Additionally, a lip (11) provided on the strip (1) rests against the facing surface of the building component (21).