Sealing Tape Expansion Control for Window Renovation

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Solution Overview

Problem

Existing methods for sealing new window frames during renovation are inefficient and unreliable, particularly due to difficulties in accessing and securing flexible foam sealing tapes within channel-shaped recesses in masonry, leading to incomplete sealing and compromised insulation.

Innovation Solution

A method involving a sealing tape with a soft, compression-recoverable foam layer and a rigid layer bonded together, where the tape is inserted into the recess with the rigid layer positioned closer to the bottom, secured at a predetermined distance, and the foam layer expands to seal against the window frame, ensuring a complete and secure seal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If flexible foam sealing tapes with rigid layers are pre-assembled on window frames, then sealing function is provided, but the rigid layer is difficult to access in the desired installation position and it is not possible to check that the recess is completely sealed

Engineering Contradiction:

Improvesealing completenessVSAvoidaccessibility and inspectability

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

Instead of attaching the sealing tape to the window frame and trying to reach into the recess, the invention inverts the approach by inserting the sealing tape into the recess first, then installing the window frame over it. This allows the sealing tape to be properly positioned and inspected before the window frame obscures the view.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The sealing tape is inserted and secured in the recess before the window frame is installed. This preliminary action ensures the sealing is in place and can be inspected before the final assembly step, allowing for verification of complete sealing.

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If new window frames have greater width than old window frames, then modern design requirements are met, but the window frame remains outside the recess requiring additional sealing of the space between the recess bottom and window frame

Engineering Contradiction:

Improvecompatibility with modern window framesVSAvoidsealing process complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The sealing tape is designed with compression-recoverable foam that changes its density and volume parameters. When inserted, it is compressed to fit the recess, then recovers its volume to fill the gap between the recess bottom and the wider window frame, adapting to the increased window frame width.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The sealing tape uses composite material structure with a rigid layer for structural support and positioning, combined with compression-recoverable foam for sealing and gap-filling. This composite approach handles both the positioning requirement and the variable gap depth caused by wider window frames.

Inventive Principle:

Principle #40Composite materials

3Reliability

If sealing tapes are inserted into channel-shaped recesses, then sealing is provided, but varying recess widths and depths make consistent sealing difficult

Engineering Contradiction:

Improvesealing effectivenessVSAvoidaccommodation of varying recess dimensions

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The compression-recoverable foam changes its physical parameters from a compressed state during insertion to an expanded state after installation. This allows the same sealing tape to adapt to varying recess dimensions - when inserted, it fits the narrower space, then expands to fill the complete gap regardless of the original recess depth or width variations.

Inventive Principle:

Principle #35Parameter changes

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

This method guarantees a reliable and efficient sealing of the new window frame in the masonry, accommodating varying recess widths and depths, while maintaining thermal insulation standards, and simplifies the installation process for craftsmen.

Implementation Method 1

a first layer of soft, compression-recoverable foam

Methodology Applied

Scientific EffectCompression recovery: Elastic Recovery

Data Source

PatentEP2584134B1Method for producing a seal in window renovation

Publication Date: 2015.04.08 ISO CHEM GMBH

Figure 1
Figure 2a
Figure 2b

AI summary

The method involves temporarily limiting an expansion of a layer (18) of a sealing tape (16) by clamping a thinner stiff layer (20) directly against side walls of a channel-shaped recess or by clamping the stiff layer indirectly against the side walls of the recess by use of an intermediate clamping aid part and a set of retaining elements, which exerts retaining function on the stiff layer. A window frame (24) is installed in an area of the recess during temporary limitation of the expansion of the layer, where the layer expands until the sealing tape rests against the window frame. The retaining elements are flat retaining strips, screws (36) and nails.