Method and assembly set for a sealed connection of a shower or bath tub

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Solution Overview

Problem

Existing sealing methods for bathtubs and shower trays in room corners often result in wrinkles due to non-flat and non-angled distances between the bathtub and room walls, compromising the sealing effect.

Innovation Solution

A method involving a tub sealing tape with a V-shaped incision and a bridging strip that is glued over the cut, allowing for a continuous, wrinkle-free application by adhering to angled walls, and an installation kit with a non-stretchable tub sealing strip and stretchable bridging strip to ensure a uniformly sealed connection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a two-layer structure with transition element overlapping sealing strips is used in the corner area, then the sealing tape can be attached to non-flat and non-angled walls, but wrinkles form and sealing effect is reduced

Engineering Contradiction:
Improveadaptability to non-flat and non-angled wallsVSAvoidsealing uniformity
Core Design Contradiction:
Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The sealing tape is divided into two functional layers: a non-stretchable sealing strip that provides the primary seal, and a stretchable bridging strip that adapts to wall irregularities. This segmentation allows each layer to perform its specific function without interfering with the other, preventing wrinkles while maintaining adaptability.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Different regions of the sealing system have different properties: the sealing strip is non-stretchable to maintain seal integrity, while the bridging strip is stretchable to accommodate wall variations. This local differentiation of material properties resolves the contradiction between adaptability and sealing precision.

Inventive Principle:
Principle #3Local quality

2Manufacturing precision

If the sealing tape is made non-stretchable to maintain seal integrity, then sealing precision is improved, but it cannot adapt to varying distances between bathtub and walls

Engineering Contradiction:
Improvesealing integrityVSAvoidadaptability to varying wall distances
Core Design Contradiction:
Manufacturing precisionVSAdaptability or versatility

Solution Approach 1:

The sealing system is segmented into a non-stretchable sealing strip for maintaining seal integrity and a stretchable bridging strip for adapting to wall variations. This allows the system to simultaneously achieve both sealing precision and adaptability through functional division.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The stretchable bridging strip acts as an intermediary element between the non-stretchable sealing strip and the irregular walls. It mediates the geometric mismatches and distance variations, allowing the sealing strip to maintain its integrity while the system adapts to wall variations.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Ease of operation

If the transition element overlaps the sealing strips, then attachment to angled walls is enabled, but a two-layer structure causes wrinkles

Engineering Contradiction:
Improveease of attachment to angled wallsVSAvoidwrinkle formation
Core Design Contradiction:
Ease of operationVSManufacturing precision

Solution Approach 1:

The sealing system is segmented into a sealing strip layer and a bridging strip layer, where each layer has a specific function. The bridging strip is positioned to bridge wall gaps without creating overlapping layers on the sealing surface, enabling easy attachment while preventing wrinkles.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The bridging strip operates in a different functional dimension than the sealing strip. While the sealing strip provides the seal, the bridging strip handles the geometric adaptation in a separate layer, allowing attachment to angled walls without compromising seal quality.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

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

Enables a uniformly sealed connection between the bathtub and room walls without wrinkles, maintaining the sealing integrity and ease of installation.

Implementation Method 1

a shower tray or bathtub with two walls 91 forming a corner 9 of a room using a tub sealing tape 1. The tub sealing tape 1 is adhered with its sealing-adhesive surface 4 to the tub edge

Methodology Applied
Scientific EffectAdhesion: Adhesive

Implementation Method 2

The incision 6 is covered by a liquid-tight bridging strip 7, which is glued completely over the cut and onto the back of the tub sealing tape 1

Methodology Applied
Scientific EffectAdhesion: Adhesive

Data Source

PatentEP4609768A1Method and assembly set for a sealed connection of a shower or bath tub
Publication Date: 2025.09.03 EDM SYST GMBH
  • EP4609768A1 patent drawingFigure 1~2b
  • EP4609768A1 patent drawingFigure 2c~2d
  • EP4609768A1 patent drawingFigure 3

AI summary

The invention relates to a method for producing a sealed connection of a shower or bathtub (8) with two walls (91) forming a corner (9) of a room, with a tub sealing strip (1) having a nonwoven section (2) in the transverse direction, to which a nonwoven-free section (3) is connected, in which a sealing-adhesive surface (4) is arranged, wherein the tub sealing strip (1) is glued with its sealing-adhesive surface (4) to two adjacent tub sides of the shower or bathtub (8), wherein the tub sealing strip (1) is provided with an incision (6) in the region of the tub corner delimited by the two tub sides in the transverse direction (Y) up to an area in front of the sealing-adhesive surface (4), in a further step, a liquid-tight bridging strip (7) is applied over the incision (6) which is formed in this case in a V-shaped manner and completely covering it, onto the rear side opposite the sealing-adhesive surface (4). the tub sealing tape (1) is glued,In a subsequent step, the shower or bathtub (8) is placed with the corner of the tub against the corner of the room (9) and the tub sealing tape (1) is glued to the adjacent walls (91) with the bridging strip (7), wherein the bridging strip (7) is glued to the adjacent walls (91) in the area of ​​the corner of the room (9). The invention further relates to an assembly kit for carrying out the method.