Viewing Window Lip Seal for Sterile Clean Room Enclosures
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Solution Overview
Problem
Existing viewing window seals in sterile or clean room environments often form uncontrolled corners, gaps, and undercuts, which can lead to contamination, and their assembly is cumbersome due to adhesive bonds or clamping profiles.
Innovation Solution
A full-profile lip seal with a circumferential bead is clamped between parallel clamping surfaces, avoiding gaps and undercuts, and providing a continuous seal around the viewing window, ensuring a reliable and gap-free attachment without adhesives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional window seals with adhesive bonds or clamping profiles are used, then the viewing window can be sealed to the mounting frame, but uncontrolled corners, gaps, and undercuts are formed that become breeding grounds for microbial growth and contamination
Solution Approach 1:
The lip seal is designed with a specific curved profile featuring a rounded sealing lip that contacts the mounting frame. This curvature eliminates sharp corners and flat surfaces where contamination could accumulate, creating a profile that is inherently resistant to microbial growth while maintaining effective sealing.
Solution Approach 2:
The lip seal is made from permanently elastic material that can be elastically deformed during installation between two parallel clamping surfaces. This flexibility allows the seal to conform perfectly to the mounting frame surfaces, eliminating gaps and undercuts that would otherwise form rigid structural weaknesses prone to contamination.
2Reliability
If adhesive bonds are used to attach window seals to mounting frames, then the seal can be fixed, but the installation process becomes cumbersome and time-consuming
Solution Approach 1:
The invention replaces adhesive bonding with a purely mechanical clamping system. The lip seal is attached by elastic deformation between two parallel clamping surfaces, eliminating the need for adhesives entirely. This mechanical approach significantly reduces installation time and complexity while maintaining secure attachment.
Solution Approach 2:
The lip seal utilizes changes in its physical state through elastic deformation during installation. By temporarily deforming the permanently elastic material between clamping surfaces and then allowing it to recover, the seal achieves secure mechanical attachment without requiring chemical bonding processes.
3Reliability
If adhesive bonds with clamping profiles are used for holding window seals, then the seal can be secured, but replacement of defective viewing windows or seals becomes time-consuming
Solution Approach 1:
The lip seal is designed as a separate, modular component that can be independently installed and removed from the mounting frame. The segmentation of the sealing system into discrete elements (lip seal, clamping surfaces, mounting frame) enables quick replacement of defective seals without affecting other components, significantly improving ease of repair.
Solution Approach 2:
The clamping mechanism provides a dynamic attachment system where the lip seal can be easily inserted and secured by elastic deformation between the clamping surfaces. This dynamic mechanical connection allows for quick installation and removal, making replacement of defective seals straightforward and time-efficient.
4Duration of action of stationary object
If the seal's inherent clamping effect diminishes or adhesive bonds are compromised over service life, then the seal continues to function, but uncontrolled corners, gaps, and pockets are exacerbated leading to increased contamination risk
Solution Approach 1:
The lip seal's permanently elastic material provides a self-maintaining clamping effect. As the seal is compressed between the parallel clamping surfaces, its inherent elasticity continuously exerts outward pressure, maintaining constant sealing force without degradation over time. This self-service mechanism ensures the seal remains effective throughout its service life without requiring external adjustment or reinforcement.
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 solution effectively prevents contamination by ensuring a tight, gap-free seal around the viewing window, simplifying assembly, and maintaining sterility and aseptic conditions within the clean room environment.
Implementation Method 1
the lip seal, preferably designed as a solid profile, is elastically deformed with its first lip seal section between two parallel or substantially parallel clamping surfaces
Data Source
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AI summary
The invention relates to a viewing window of an enclosure that forms a clean room or sterile room (3) for the sterile and/or aseptic treatment of packaging means, said window comprising a mounting frame that forms a mounting frame opening, a pane that seals the mounting frame opening, at least one continuous pane seal that seals the transition between the pane and the mounting frame, and means for retaining the pane on the mounting frame.