Skinned Door Panels With Moisture-Resistant Replacement Bottom Rails

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Solution Overview

Problem

Skinned door panels are susceptible to moisture penetration at trimmed edges, leading to issues like swelling, mold formation, and premature failure, necessitating adjustments that compromise their structural integrity.

Innovation Solution

Incorporation of a replacement bottom rail with sealant cavities between the rail and skins, along with pressure relief features, to prevent moisture ingress and enhance durability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the bottom edge of the door panel is trimmed to adjust height, then the door panel can fit within building openings, but moisture penetration occurs at the trimmed edge leading to swelling, mold formation, and premature failure

Engineering Contradiction:

Improveheight adjustment capabilityVSAvoidresistance to moisture penetration

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The bottom rail is separated from the skins and interior stile, allowing independent replacement of the bottom rail component. This segmentation enables height adjustment by removing and replacing the bottom rail without affecting the integrity of the skins and interior stile, while the replacement bottom rail includes moisture protection features

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A replacement bottom rail acts as an intermediary component between the skins and the trimmed edge. This replacement bottom rail includes a moisture barrier and sealant cavities that prevent moisture from reaching the skins and interior stile, thus protecting against moisture penetration while allowing height adjustment

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If height adjustment is performed by trimming the bottom edge, then the door panel fits the opening, but the structural integrity and long-term viability of the door panel are degraded

Engineering Contradiction:

Improveconvenience of height modificationVSAvoidstructural integrity

Core Design Contradiction:

Ease of operationVSStrength

Solution Approach 1:

The original bottom rail is removed (discarded) along with the trimmed portion, and a replacement bottom rail is installed. The replacement bottom rail recovers the structural integrity function by providing a new, intact bottom edge that maintains the door panel's strength and stiffness, while also providing moisture protection

Inventive Principle:

Principle #34Discarding and recovering

Solution Approach 2:

The replacement bottom rail is designed in advance with integrated moisture barrier and sealant cavities, so that when installed after trimming, it immediately provides both structural support and moisture protection without requiring additional protective measures

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250320770A1Skinned door panels with replacement bottom rails

Publication Date: 2025.10.16 ANDERSEN CORPORATION

AI summary

Skinned door panels with replacement bottom rails and related methods are described herein. The skinned door panels with bottom rail replacements and related methods of replacing bottom rails in door panels having a trimmed bottom edge include a replacement bottom rail that is particularly resistant to moisture penetration allowing for convenient modification of the height of the door panels without degrading their long-term viability in use.