A professional who examines synthetic-fiber thread, passing continuously in front of electric light, for such defects as weak spots, lumps, irregular twisting, grease stains, and snags.

• Rejects lots of thread not meeting plant standard.
• May inspect washed and dried cakes of yarn for loose ends and remove excess thread with scissors and be designated cake inspector.
• May grade skeins of yarn by weight or presence of irregularities and be designated sorter.