A professional who operates battery of machines to refine pulp and shorten fibers as pulp flows continuously through machines to prepare pulp for papermaking. Respnsibilities include:

• Turns handwheels to adjust distance between bedplate and rotor knives to obtain specified fineness of fibers.
• Starts machines and pumps to regulate flow of pulp from beater chests through refining machines to paper machine chest.
• Examines pulp, reviews laboratory test reports, and adjusts machines to ensure that pulp meets specifications.
• May change bedplates and rotor knives, using handtools.
• May clean interior of storage chests, using water hose.