Window Film Anchoring Device with Interlocking Engagement Members
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Solution Overview
Problem
Existing window film anchoring devices fail to prevent the separation of window panes from their frames under impact, are exposed to inclement weather, and have limited strength and durability, leading to frequent replacements and reduced light transmission.
Innovation Solution
A window film anchoring device featuring interlocking upper and lower engagement members that constantly press on the film from above and below, preventing lateral motion and enhancing impact resistance by up to 20 psi when applied to two sides and significantly more when applied to four sides, while being easily attachable to existing frames and not exposed to weather.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive strips or tape are used to secure window film to the frame, then the film is held in place, but the adhesive force is of limited strength and the securing means is liable to fail when subjected to relatively low impact of approximately 5-7 psi
Solution Approach 1:
The anchoring device divides the securing function into multiple discrete engagement members (first and second engagement members) that can be independently positioned and interlocked, rather than relying on a single adhesive bond. This segmentation allows the system to distribute impact forces across multiple points of mechanical engagement.
Solution Approach 2:
The patent introduces an intermediary anchoring device with film-engaging surfaces that mechanically interlocks with the window film, serving as a mediator between the film and the frame. This intermediary structure transfers and distributes loads away from weak adhesive bonds to stronger mechanical engagement points.
2Strength
If clamping profile is used to secure window film, then the film is clamped to the frame, but the window film is liable to be dislodged from underneath the film contacting surface when subjected to relatively low impulse of approximately 5-7 psi
Solution Approach 1:
The patent transitions from a single-plane clamping approach to a multi-dimensional interlocking system where engagement members extend beyond the film surface and interlock with each other. This dimensional expansion creates a three-dimensional mechanical lock that prevents film dislodgement from underneath, as the interlocking members resist upward and lateral forces.
Solution Approach 2:
The anchoring device combines multiple materials with different properties: rigid engagement members for structural strength, flexible gaskets for sealing and cushioning, and adhesive components for additional bonding. This composite construction provides both strong attachment and protection against film dislodgement under impulse loads.
3Ease of manufacture
If adhesive securing means are exposed to the exterior, then they can be applied to the frame, but they are exposed to inclement weather conditions and to sunlight, and therefore will detach from the window film or from the window frame over the course of time
Solution Approach 1:
The patent incorporates flexible gaskets as thin film elements that provide weather sealing and protection for the adhesive bonds. These gaskets create a protective barrier between the adhesive securing means and the exterior environment, shielding them from inclement weather and sunlight while maintaining the simplicity of adhesive application.
Solution Approach 2:
The design incorporates protective gaskets and sealing elements that are installed beforehand to cushion and protect the adhesive bonds from environmental damage. This prior protection prevents weathering and UV degradation before they can compromise the adhesive securing means.
4Strength
If anchoring device is added to increase impact resistance, then impact resistance increases, but the device complexity increases with interlocking upper and lower engagement members
Solution Approach 1:
The complex anchoring device is segmented into modular engagement members that can be independently manufactured, installed, and interlocked. This segmentation reduces overall device complexity by breaking down the complex structure into simpler, standardized components that work together to provide high impact resistance.
Data Source
AI summary
A window film anchoring device is disclosed which comprises a first engagement member and a second engagement member between which a free film portion of a film affixed to a window pane is inserted. The first and second engagement members are attached to a corresponding window frame portion, and film engaging surfaces of the first engagement member are in interlocking and lateral motion preventing relation with complementary film engaging surfaces of the second engagement member so as to maintain a constant pressing force on the free film portion. The anchoring device is adapted to be a retrofit kit, and is able to be easily attached to an existing window frame, in order to increase the impact or impulse resistance of the window pane. The anchoring device may also be factory assembled to a newly produced frame.