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The daylight providing system for sandwichpanels in pitched roofs. Highly isolating and without condensation burden.

introvideoEN240The ATLAS WINDOWPANEL is a daylight providing system for pitched sandwichpanel roofs. Applicable for every type of type sandwichpanel, high isolating values and without condensation burden.

The ATLAS WINDOWPANEL is protected by an European Patent EP 3 124 714 B1 and Atlas Acomfa is the holder. The inventor A.G. de Klerk is director and one of the shareholders of the company.


foto AdK 100x113The Atlas Windowpanel was invented by Mr. Aad de Klerk, P.E. His invention is the result of extensive research. By answering five questions, Mr. Aad de Klerk tells us more about the Windowpanel's history and patent.

1. When did your first learn about plastic processing?
Aad de Klerk: “That was a long time ago, when I worked for the company owned by my father and uncle. In 1993, I started working at Stabilit in IJmuiden (NL), my father's company, where they produced polyester corrugated and profile sheets. Ever since I have been involved in the production, trade, modification and processing of translucent plastic sheets for roofs and walls. During this time, I developed various product and production innovations. This is how I gained a lot of experience and knowledge on plastic processing and the application of translucent plastic sheets on roofs and walls in the construction industry.”

2. How did you acquire the knowledge needed for this invention?
Aad de Klerk: “Obviously, I learned a lot when I worked at my father's company. Prior to that, I studied Engineering Physics at Delft University of Technology (NL). That's where I learned the theory to understand, qualify and analyse the building physics and characteristics that play an important role in daylight constructions in isolated buildings. This also enables me to assess other factors that are important for our clients, such as the implementation of daylight constructions.”

3. Why did you apply for a patent on the Atlas Windowpanel?
Aad de Klerk: “The Windowpanel solves all problems encountered with products of our competitors. On top of that, it can be applied to all existing sandwich sheets. There are several large multinationals that also supply sandwich sheets and copying the system would be a piece of cake for them. That is why we decided to protect ourselves against this and go through the costly application process for a European patent. Patent law was part of my study anyway and I also learned a lot during my patent battle with TNO (the Netherlands Organisation for Applied Scientific Research). I had graduated but I did manage to win that battle against this renowned Dutch institute in 1994. A student who just graduated and won a battle against TNO; a story so great that on June 9, 1994 it was one of the headlines of the Volkskrant (a well-known Dutch newspaper).”

4. Tell us a bit more about the development of the Windowpanel.
Aad de Klerk: “At the end of the 1990s, there was more interest for the use of insulation in utility and agricultural buildings, which caused a considerable increase in the use of sandwich sheets. In our capacity as the board of Atlas Acomfa, we realised that we had anticipate the need for daylight provisions in isolated buildings more actively. We saw many daylight solutions for sandwich sheets but none of them met the quality requirements for our product portfolio. In 2013, I came up with the idea of the Windowpanel and created the first prototypes. In October 2013, we started checking the patent literature to see if someone else had already come up with the same, simple concept. This wasn't the case, hence we applied for a Dutch patent on February 12, 2014. That same year, we also built a test setup where we could observe the build-up of moisture, a big problem with daylight cassettes, and improve the situation where necessary. In 2016, we had our first pilot project at Welvreugd in Maasland (NL), which was followed by another one in 2017. During these pilot projects we were able to get rid of all the teething troubles.”

MLA AdK 2005. Which patent does apply to the Windowpanel and how do you go about protecting it?
Aad de Klerk: “In 2015, we found out that we had to make a fundamental change with regard to the ventilation. However, since this had not been described in the Dutch patent, we applied for a new and European one on July 29, 2015. On March 21, 2018 Atlas Acomfa definitely acquired the European patent. Monitoring is hard but we do keep our eyes (and ears!) open.  As of late I can monitor things myself from the air as I got my pilot's license for Micro Light Aircrafts in August 2017 and I fly quite regularly over the Netherlands and other parts of Western Europe. Obviously, I look down every now and then to see if I can spot a Windowpanel as I will always recognise my own invention.”


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