A professional who tends filter-screen unit at wet end of fourdrinier machine that makes paper, sheet pulp, or insulation board from pulp stock. Respnsibilities include:

• Adjusts guides to prevent wet felt from running off machine, using wrench.
• Turns valves to regulate flow of water and pulp onto filter screens as requested by fourdrinier-machine operator.
• Scrapes residue from screens with hand rake.
• Observes pickup of pulp from cylinder screens by carrier mat and formation of continuous sheets to detect defects in paper, such as breaks, slivers, dirt, and slime spots.
• Notifies fourdrinier-machine operator of paper defects and machine malfunctions.