A professional who assists screen tender in removing impurities and uncooked chips from cooked woodpulp. Respnsibilities include:

• Turns valve to activate pump that fills defoamer tank.
• Washes clogged masses of fibers and impurities from screen plates, using water hose.
• Washes and scrapes sand and sludge from rifflers and flow boxes.
• Draws and spreads pulp sample in sheet mold.
• Observes sample against light, and notifies screen tender when sample fails to meet cleaning specifications.
• May remove and replace screen plates, using handtools.
• Performs other duties as described under helper master title.