Answer: knotter

AnswerCrossword Clue
KNOTTERHarvester device.
KNOTTERDevice for tying, as in a harvester.
knotterone that knots (to tie with a closed loop)
knotterperson or thing that ties knots
knotterdevice that ties knots in thread during the manufacture of yarn
knotterperson or thing that takes out or removes knots