Computer control in pulp and paper 1961-1969

The pulp and paper industry is a major one in the United States and utilizes many complex processes. The first control computer was installed in 1961, and the number of installations has increased steadily to about 47 in March, 1969. The applications at many of these installations have been published in some technical detail. This paper briefly describes the processes, many of the control problems and the solutions that have been used. Although the paper deals primarily with the U. S. industry, significant developments abroad are mentioned. Economic and technical results published by companies which have installed 21 of the total computers are summarized.