Company Filing History:
3 out of 20 
2 out of 6 Years Active: 1978-1980
Title: **Innovations by Douglas Wahren: A Pioneer in Paper and Pulp Machinery**
Introduction
Douglas Wahren, an inventive mind hailing from Karlstad, Sweden, has made significant contributions to the field of paper and pulp machinery through his innovative patents. With a total of five patents to his name, Wahren has focused on enhancing the efficiency and functionality of headboxes and forming cylinders used in paper production.
Latest Patents
Among his latest innovations is the "Suspension device for a headbox for paper and pulp machines." This invention allows for a headbox to be pivotally mounted at the ends of multiple control links fixed to the machine frame. By accurately controlling the rotation and translation of these control links, the vertical position and angular relation of the headbox can be precisely set, ensuring it remains fixed in the desired position during operation.
Wahren's invention titled "Two-sided drainage in a roll-type twin-wire former" is another notable contribution. This method involves injecting a jet of stock between two tensioned wires, transporting the wires over a circumferentially grooved forming cylinder. The design enables water to drain both inwardly and outwardly from the forming cylinder during the formation of the web, effectively eliminating substantial two-sidedness of the produced material by regulating the jet stock size, wire speed, and tension.
Career Highlights
Throughout his career, Douglas Wahren has been associated with prominent companies including Aktiebolaget Karlstads Mekaniska Werkstad and Ab Karlstads Mekaniska Werkstad. His work in these organizations has allowed him to apply his innovative ideas to real-world applications, thus contributing to advancements in the paper and pulp industry.
Collaborations
Wahren has worked alongside notable colleagues such as Erik G. Stenberg and Carl Zotterman. Collaborating with such individuals has further enriched his experience and contributed to the collective innovation in their field.
Conclusion
Douglas Wahren stands out as an influential inventor in the realm of paper and pulp machinery. His innovative patents not only showcase his ingenuity but also highlight the importance of continual advancement in industrial processes. Through collaboration and dedication, Wahren's contributions are sure to leave a lasting impact on the industry.