David Depasquale

Title: David Depasquale: Innovator in Paper Production

Introduction

David Depasquale is a notable inventor based in Nanaimo, Canada. He has made significant contributions to the field of paper production, particularly through his innovative patent related to filled paper. His work has implications for the manufacturing processes in the paper industry.

Latest Patents

David Depasquale holds a patent for the "Production of filled paper." This invention involves a unique method of creating filled paper by adding a cationising amount of cationic polymer to a slurry of precipitated calcium carbonate. The process includes mixing this slurry into a cellulosic suspension, forming a thin stock, and incorporating anionic particulate material. The method also involves mixing a polymeric retention aid into the thin stock, which includes the precipitated calcium carbonate and the anionic particulate material. The resulting sheet is then drained on a screen and dried. A suitable slurry for this purpose consists of 5 to 70% by weight precipitated calcium carbonate and cationic polymer selected from 0.1 to 1% cationic starch and 0.01 to 0.3% of a high charge density, relatively low molecular weight, cationic polymer.

Career Highlights

Throughout his career, David has worked with several companies, including Allied Colloids Limited and Mineral Technologies, Inc. His experience in these organizations has contributed to his expertise in the field of paper production and innovation.

Collaborations

David has collaborated with various professionals in his field, including his coworker Bruce Evans. These collaborations have likely enhanced his work and contributed to the development of his patent.

Conclusion

David Depasquale is a distinguished inventor whose work in the production of filled paper showcases his innovative spirit and technical expertise. His contributions to the industry are noteworthy and reflect his commitment to advancing paper manufacturing processes.