Requirements for components in insulating glass edge systems continue to rise — and we are evolving with them. Larger glass formats, an ongoing shortage of skilled labor, and increasing automation significantly heighten the demands placed on connector performance. In collaboration with our long-standing development partner Technoform, we have therefore advanced the EK straight connectors used in spacer systems and aligned them even more precisely with the complex requirements of IGU production.
The edge seal of insulating glass is considered a crucial lever for the overall performance of an IG unit. It must meet high expectations in terms of thermal and mechanical requirements and ensure long-term functionality. Spacers, sealants, desiccants, and connector solutions must interlock with absolute precision so that the entire system maintains all required parameters.
Connectors, in particular, ensure the form- and force-fitting connection of profiles, compensate for production tolerances, and provide process reliability.
In our interview, Michael Kühl, Head of Sales at EDUARD KRONENBERG GmbH, explains the practical requirements and how EK and Technoform align their solutions to them.
Mr. Kühl, EK Connect components are already recognized for their high quality. What improvements were still needed for the straight connectors?
Even strong products can be refined. Together with Technoform we took another developmental step – with the goal of further optimizing both our steel and plastic variants for the latest Warm Edge systems. The focus was on stability, handling, and process reliability. The intensive technical exchange with Technoform helped us fine-tune the connector dimensions even more precisely to the newest profile geometries.
What innovations characterize the revised straight connectors?
We have made targeted improvements to both the steel and plastic versions and now also offer connectors with an integrated bridge.
- Technoform CN84 (Steel) | suitable for SP 13, 14 and 18:
To ensure an even more precise fit to the profile, the steel connector was redesigned and optimized in several respects: A longer bead and lateral embossing improve stability and seal tightness. A modified PSC geometry of serrated edges compensates for tolerances and prevents gaps. Chamfered and graduated connector ends simplify pre-assembly and secure coupling. This connector is available for all common spacer widths from 8 to 24 mm.
- Technoform CN85 (Hybrid with Bridge) | suitable for SP 13, 14 and 18: Building on the improvements of the CN84, this version features an additional plastic bridge that seals the rear of the profiles and prevents desiccant leakage. The design is especially advantageous for large formats and highly stressed frame structures. Initially available for 16 and 18 mm widths.
- Technoform CN80 (Plastic) | suitable for SP 13, 14 and 18: Based on customer and fabricator feedback, the proven EK POLO CN27 was completely redesigned. The CN80 connector series focuses on improved profile fit, easier insertion, and even greater stability. Key features include: Springy Y-cut for easier profile coupling and tolerance compensation. Lateral gearing for optimum locking with profile contour and tolerance adaption. Its predecessor already impressed with outstanding stiffness values. The CN80 raises these even further. In addition, a special asymmetrical version is available for narrow spacer widths to optimize desiccant filling. Available from 10 to 24 mm.
- Technoform CN88 (Plastic with Bridge) | suitable for SP 13, 14 and 18: A bridge-equipped version of the CN80 is currently under development for large, sensitive spacer sizes of 22 and 24 mm.
What benefits do the new connectors offer in practice?
Across manual and automated production environments, the new solutions deliver clear advantages:
- Easier handling: Optimized insertion geometry allows quicker and smoother assembly.
- Increased stability: Reinforced connector construction prevents buckling under load.
- Improved retention: Secure locking mechanisms enhance coupling strength.
- Higher tightness: Better tolerance compensation reduces the risk of gap formation.
- Greater production efficiency: Smooth handling optimizes processes in insulating glass manufacturing.
What does this mean for customers?
The improvements lead to measurable gains in process reliability and long-term structural stability. In increasingly automated production environments, flawless interaction between all components is essential. The optimized straight connectors enable more efficient production with maximum stability. Particularly as automation in insulating glass manufacturing continues to rise, all components must perform perfectly, since manual control and readjustment are not always possible. Offsetting the shortage of skilled workers through more efficient processes and higher levels of automation is only achievable if the connector can meet the highest demands for fast desiccant filling, maximum stability, and a secure, reliable hold.
Our collaborative partnership with Technoform has enabled us to align every detail perfectly, creating genuine added value for our customers. Anyone who would like to experience the benefits firsthand is welcome to request a sample delivery.
EK’s connector solutions are suitable for processing on frame bending machines as well as for manual frame assembly, and they match spacer geometries perfectly. With EK Connect, you rely on innovative connection elements that guarantee the highest levels of quality and performance, ensuring an optimal production process from start to finish – with maximum efficiency and safety.
Partner To All System Manufacturers
EK produces straight and corner connectors as well as Georgian bar accessories in both steel and plastic – all precisely matched to the geometries of all common system suppliers. EK Connect represents a high-performance, future-ready family of connector solutions that ensures consistent quality, superior performance, and maximum process reliability from start to finish. For the right connector solution, visit: