Date of Award


Degree Name

Bachelor of Science


Paper Science and Engineering


The purpose of this thesis was to determine the effect of air knife angle and the distance between the air knife blades and backing-roll on coated board properties. Results of the experiment indicated that increasing the angle resulted in more uniform and smaller coated pore size. Increasing the distance resulted in more uniform pores with no effect on size. The optimum angle of operation was found to be between 17 and 20 degrees (approximate impingement angle) and optimum distance was determined to be between 80 and 90 mils. Further work that can be completed as a result of this thesis include; jet patterns of air knife isobars, locating exact optimization of angle and distance, determination of exact air jet angle, and the effect of orifice opening.