Heikki Ilvespaa

Title: Heikki Ilvespaa: Innovator in Paper Production Technology

Introduction

Heikki Ilvespaa is a notable inventor based in Jyvaskyla, Finland. He has made significant contributions to the field of paper production, holding a total of 16 patents. His innovative methods have advanced the efficiency and quality of paper manufacturing processes.

Latest Patents

One of Heikki Ilvespaa's latest patents is a method for producing surface-treated paper, particularly fine paper. This method involves drying a paper web that has been dewatered by pressing in the forward dryer section. The drying energy is applied asymmetrically in the z-direction from the bottom face of the web. This approach reduces shrinkage in both the machine direction and the cross direction, which typically occurs as the dry solids content increases. The design includes successive groups with single-wire draw that are open downward, allowing paper broke to be removed by gravity onto a conveyor. The paper web, which may curl due to asymmetric forward-drying, is then passed to the finishing section where it is moistened and/or worked plastically to mitigate curling tendencies.

Career Highlights

Heikki Ilvespaa has worked with prominent companies in the paper machinery industry, including Valmet Paper Machinery Inc. and Valmet Corporation. His experience in these organizations has allowed him to refine his expertise in paper production technologies.

Collaborations

Heikki has collaborated with notable coworkers such as Antti Kuhasalo and Allan Liedes, contributing to advancements in the field through teamwork and shared knowledge.

Conclusion

Heikki Ilvespaa's innovative work in paper production technology has significantly impacted the industry. His patents reflect a deep understanding of the complexities involved in manufacturing fine paper, showcasing his dedication to improving production methods.