We’re excited to unveil our most advanced shrink sleeve seamer yet at LabelExpo Europe 2025, which will be held from September 16-19 at Fira Gran Via in Barcelona, Spain. Visit Booth 5B33 to experience the K3 Plus in action; our third-generation innovation in shrink sleeve converting technology, built for high-speed, high-precision performance.
LabelExpo combines the global label and package printing industry across segments like labels, flexible packaging, and folding cartons. As a leading supplier of converting machines for shrink sleeves and flexible packaging, we’re ready to showcase solutions that transform your product line.
Make Booth 5B33 your destination at LabelExpo 2025 and discover how Karlville is shaping the future of packaging technology.
Engineered for Precision, Built for Efficiency
The K3 Plus Seamer introduces a new era in shrink sleeve converting, designed to optimize performance across short runs, complex label shapes, and demanding applications. It features a friction-free, fingerless forming system that eliminates traditional wear points, delivering superior seam quality while preserving film and ink integrity.
Advanced automation enables lay-flat correction in real time through a feedback loop, while non-stop layout capabilities help minimize downtime and material waste. Combined, these features enable faster, cleaner setups with exceptional repeatability.
Main Advantages of the K3 Plus Seamer
- No forming fingers = no friction = significantly less ink and film wear.
- Fastest setup in the industry, powered by intelligent recipe recall and automated calibration.
- Auto-correct feedback loop ensures real-time seam adjustments and higher output reliability.
- An additional nip roller improves tension stability and enhances film handling.
- Unwind with an independent tension zone allows precise control over forming section.
- Seams as close as 5mm from film edge without compromising performance.
- Tool-free conversion for narrow web labels; no tooling required.
- No wear parts in the forming system = lower maintenance costs and longer equipment life.
- Enhanced tension control and modularity.
- Ability to automate with turrets for unwind and rewind.
Seamless Integration for Smarter Converting
The third-generation K3 Plus Seamer is built for speed, accuracy, and minimal waste.
Key Innovations
- Multiple tension zones allow precise control across unwind, forming, and rewinding stages, ensuring consistent lay-flat performance.
- Brush-tip solvent application delivers pinpoint accuracy with reduced buildup, while digital solvent flow monitoring enhances oversight.
- Optional laser perforation enables tool-free conversion, ideal for short runs, complex containers, and narrow web applications.
Engineered for adaptability and uptime, the K3 Plus offers a significant leap in seam quality, reduced maintenance needs, and unmatched efficiency for converters pushing the limits of innovation.
Shrink Sleeve Converting Solutions That Scale With You
Karlville offers a full suite of shrink sleeve converting machines engineered for precision, efficiency, and adaptability, whether running high-speed production or short runs with complex label shapes.
Our K2 and K3 Plus seamers represent the evolution of sleeve converting. Each is designed to support converters with advanced automation, reduced waste, and seamless scalability.

Visit Karlville at LabelExpo Europe 2025: See the Future of Shrink Sleeve Converting
Karlville continues to lead the way in shrink sleeve converting with cutting-edge solutions that combine automation, precision, and adaptability. From the proven performance of the K2 to the advanced engineering of the K3 Plus, our machines are designed to help converters maximize efficiency and deliver exceptional label quality across every production run.
Come join us at LabelExpo Europe 2025, happening from September 16th to 19th at the Fira Gran Via in Barcelona. Visit us at Booth 5B33 to enjoy live demonstrations, chat with our experts, and discover how Karlville can help take your conversion process to the next level.
About Karlville Development LLC – Karlville Development LLC, also known as Karlville Converting, is a leading provider of converting machinery solutions for flexible packaging, serving both digital and conventional market spaces. Our core converting business is dedicated to delivering exceptional products and services that meet the evolving needs of the packaging industry. For more information, visit our website: www.karlville.com.