Company Filing History:
Years Active: 1977-1980
Title: Innovations of John A Histed
Introduction
John A Histed is a notable inventor based in L'Orignal, Canada. He has made significant contributions to the field of pulp bleaching processes, holding a total of 2 patents. His work focuses on improving the efficiency and effectiveness of bleaching methods used in the paper industry.
Latest Patents
Histed's latest patents include a "Simplified Bleaching Process" and a "Method and Apparatus for Automatically and Simultaneously Controlling." The simplified bleaching process involves a multi-stage approach for alkaline cooked pulps, which includes at least four bleaching stages and no more than three washing steps. This innovative method shortens certain bleaching stages to less than about 15 minutes, enhancing productivity. The second patent provides a method and apparatus for controlling the solution viscosity and degree of brightness of pulp during the bleaching process. This system utilizes optical monitoring devices that feed control signals to regulate the input of bleaching reagents based on the light reflectance values of the pulp.
Career Highlights
Histed is associated with the Canadian International Paper Company, where he applies his expertise in pulp bleaching technologies. His work has contributed to advancements in the efficiency of paper production processes.
Collaborations
Throughout his career, Histed has collaborated with notable colleagues such as William H Lawford and Murray J McLeod. These partnerships have fostered innovation and development in the field of pulp processing.
Conclusion
John A Histed's contributions to the pulp bleaching industry through his patents and collaborations highlight his role as an influential inventor. His innovative approaches continue to impact the efficiency of paper production processes.