A professional who examines mat of fiberglass insulation material for defects, picks out spots and foreign matter, and cuts out nonstandard portions. Respnsibilities include:

• Scans mat for defects as mat passes inspection station of mat machine and picks out grease and binder spots and foreign matter, using knife.
• Lowers blade to cut thick or thin spots of mat that fail to meet standards.
• Records defect and mat machine downtime on production records.
• Aids mat-machine operator in guiding mat under pressure rollers, over inspection light and slitting knives, and under automatic cutters.